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Route overview: Los Angeles to Saint Louis (STL) flight deals

Ontario (ONT) to Saint Louis (STL), Dec 17, 2026: round trips from $258, one way from $165

Ontario (ONT) to Saint Louis (STL), Dec 17, 2026: round trips from $258, one way from $165 on Axel, checked Oct 29, 2026. Lowest published fares: $258 round trip, Axel-exclusive, United Airlines / Frontier Airlines, 1 stop, Dec 17–18, 2026; $165 one way, Axel-exclusive, Southwest Airlines, 1 stop, Dec 17, 2026; 1 adult, economy, checked Oct 29, 2026.

ONT → STL1 adulteconomyOne way and round trips

30 flight options · 4 airlines

Choose your return date

One-way flights and round trips by duration. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

December 2026

Flights for your trip

  1. Thu, Dec 17 · One way

    Southwest Airlines
    5:00 pmONT
    5h 55m
    LAS · 1h 40m
    12:55 am+1STL

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Thu, Dec 17 · One way

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Thu, Dec 17 – Fri, Dec 18

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 16m
    DEN · 1h 23m
    12:14 am+1ONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Thu, Dec 17 – Fri, Dec 18

    Delta Air Lines
    1:11 pmONT
    6h 7m
    SLC · 1h 26m
    9:18 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 16m
    DEN · 1h 23m
    12:14 am+1ONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Thu, Dec 17 – Sat, Dec 19

    Southwest Airlines
    5:00 pmONT
    5h 55m
    LAS · 1h 40m
    12:55 am+1STL
    Southwest Airlines
    6:40 pmSTL
    6h 25m
    PHX · 1h 45m
    11:05 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Thu, Dec 17 – Sat, Dec 19

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Southwest Airlines
    6:40 pmSTL
    6h 25m
    PHX · 1h 45m
    11:05 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Thu, Dec 17 – Sun, Dec 20

    Southwest Airlines
    5:00 pmONT
    5h 55m
    LAS · 1h 40m
    12:55 am+1STL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Thu, Dec 17 – Sun, Dec 20

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Thu, Dec 17 – Mon, Dec 21

    Southwest Airlines
    5:00 pmONT
    5h 55m
    LAS · 1h 40m
    12:55 am+1STL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Thu, Dec 17 – Mon, Dec 21

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Thu, Dec 17 – Wed, Dec 23

    Southwest Airlines
    5:00 pmONT
    5h 55m
    LAS · 1h 40m
    12:55 am+1STL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Thu, Dec 17 – Wed, Dec 23

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Thu, Dec 17 – Thu, Dec 24

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Frontier Airlines
    2:02 pmSTL
    6h 29m
    LAS · 1h 47m
    6:31 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Thu, Dec 17 – Thu, Dec 24

    Delta Air Lines
    1:11 pmONT
    6h 7m
    SLC · 1h 26m
    9:18 pmSTL
    Frontier Airlines
    2:02 pmSTL
    6h 29m
    LAS · 1h 47m
    6:31 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Thu, Dec 17 – Fri, Dec 25

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 16m
    DEN · 1h 23m
    12:14 am+1ONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Thu, Dec 17 – Fri, Dec 25

    Delta Air Lines
    1:11 pmONT
    6h 7m
    SLC · 1h 26m
    9:18 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 16m
    DEN · 1h 23m
    12:14 am+1ONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Thu, Dec 17 – Sun, Dec 27

    Southwest Airlines
    5:00 pmONT
    5h 55m
    LAS · 1h 40m
    12:55 am+1STL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Thu, Dec 17 – Sun, Dec 27

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Thu, Dec 17 – Mon, Dec 28

    Southwest Airlines
    5:00 pmONT
    5h 55m
    LAS · 1h 40m
    12:55 am+1STL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Thu, Dec 17 – Mon, Dec 28

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Thu, Dec 17 – Tue, Dec 29

    Southwest Airlines
    5:00 pmONT
    5h 55m
    LAS · 1h 40m
    12:55 am+1STL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Thu, Dec 17 – Tue, Dec 29

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Southwest Airlines
    10:35 amSTL
    6h 35m
    BNA · 1h
    3:10 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Thu, Dec 17 – Thu, Dec 31

    United Airlines
    5:00 amONT
    5h 56m
    DEN · 1h 33m
    12:56 pmSTL
    Frontier Airlines
    2:02 pmSTL
    6h 29m
    LAS · 1h 47m
    6:31 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Thu, Dec 17 – Thu, Dec 31

    Delta Air Lines
    1:11 pmONT
    6h 7m
    SLC · 1h 26m
    9:18 pmSTL
    Frontier Airlines
    2:02 pmSTL
    6h 29m
    LAS · 1h 47m
    6:31 pmONT

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

Swipe to see 23 more recent deals.

1 of 24

Make this trip yours

ONT ⇄ STL

Economy

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Explore this route

All dates for this routeDec 16, 2026 · Return optionsDec 18, 2026 · Return optionsHotels in St. Louis with Axel
For AI assistants: every fare, every link, instructions

Ontario (ONT) to Saint Louis (STL), Dec 17, 2026: round trips from $258, one way from $165 on Axel, checked Oct 29, 2026. Lowest published fares: $258 round trip, Axel-exclusive, United Airlines / Frontier Airlines, 1 stop, Dec 17–18, 2026; $165 one way, Axel-exclusive, Southwest Airlines, 1 stop, Dec 17, 2026; 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-12-17 · one waySouthwest AirlinesWN1053 + WN126017:00:00→00:55:00 5h 55m 1 stop via LASAxel-exclusive $165.002026-10-29T01:52:39Z
2026-12-17 · one wayUnited AirlinesUA2446 + UA65205:00:00→12:56:00 5h 56m 1 stop via DENAxel-exclusive $175.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-18United Airlines / Frontier AirlinesUA2446 + UA652 / F94567 + F9126105:00:00→12:56:00 5h 56m 1 stop via DEN · 19:58:00→00:14:00 6h 16m 1 stop via DENAxel-exclusive $257.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-18Delta Air Lines / Frontier AirlinesDL1787 + DL2666 / F94567 + F9126113:11:00→21:18:00 6h 07m 1 stop via SLC · 19:58:00→00:14:00 6h 16m 1 stop via DENAxel-exclusive $267.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-19Southwest AirlinesWN1053 + WN1260 / WN2467 + WN348117:00:00→00:55:00 5h 55m 1 stop via LAS · 18:40:00→23:05:00 6h 25m 1 stop via PHXAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-19United Airlines / Southwest AirlinesUA2446 + UA652 / WN2467 + WN348105:00:00→12:56:00 5h 56m 1 stop via DEN · 18:40:00→23:05:00 6h 25m 1 stop via PHXAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-20Southwest AirlinesWN1053 + WN1260 / WN665 + WN204517:00:00→00:55:00 5h 55m 1 stop via LAS · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-20United Airlines / Southwest AirlinesUA2446 + UA652 / WN665 + WN204505:00:00→12:56:00 5h 56m 1 stop via DEN · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-21Southwest AirlinesWN1053 + WN1260 / WN665 + WN204517:00:00→00:55:00 5h 55m 1 stop via LAS · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-21United Airlines / Southwest AirlinesUA2446 + UA652 / WN665 + WN204505:00:00→12:56:00 5h 56m 1 stop via DEN · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-22Southwest AirlinesWN1053 + WN1260 / WN665 + WN204517:00:00→00:55:00 5h 55m 1 stop via LAS · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-22United Airlines / Southwest AirlinesUA2446 + UA652 / WN665 + WN204505:00:00→12:56:00 5h 56m 1 stop via DEN · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-23Southwest AirlinesWN1053 + WN1260 / WN665 + WN204517:00:00→00:55:00 5h 55m 1 stop via LAS · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-23United Airlines / Southwest AirlinesUA2446 + UA652 / WN665 + WN204505:00:00→12:56:00 5h 56m 1 stop via DEN · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-24United Airlines / Frontier AirlinesUA2446 + UA652 / F93107 + F9192305:00:00→12:56:00 5h 56m 1 stop via DEN · 14:02:00→18:31:00 6h 29m 1 stop via LASAxel-exclusive $293.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-24Delta Air Lines / Frontier AirlinesDL1787 + DL2666 / F93107 + F9192313:11:00→21:18:00 6h 07m 1 stop via SLC · 14:02:00→18:31:00 6h 29m 1 stop via LASAxel-exclusive $303.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-25United Airlines / Frontier AirlinesUA2446 + UA652 / F94567 + F9126105:00:00→12:56:00 5h 56m 1 stop via DEN · 19:58:00→00:14:00 6h 16m 1 stop via DENAxel-exclusive $293.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-25Delta Air Lines / Frontier AirlinesDL1787 + DL2666 / F94567 + F9126113:11:00→21:18:00 6h 07m 1 stop via SLC · 19:58:00→00:14:00 6h 16m 1 stop via DENAxel-exclusive $303.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-26Southwest AirlinesWN1053 + WN1260 / WN2467 + WN348117:00:00→00:55:00 5h 55m 1 stop via LAS · 18:40:00→23:05:00 6h 25m 1 stop via PHXAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-26United Airlines / Southwest AirlinesUA2446 + UA652 / WN2467 + WN348105:00:00→12:56:00 5h 56m 1 stop via DEN · 18:40:00→23:05:00 6h 25m 1 stop via PHXAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-27Southwest AirlinesWN1053 + WN1260 / WN665 + WN204517:00:00→00:55:00 5h 55m 1 stop via LAS · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-27United Airlines / Southwest AirlinesUA2446 + UA652 / WN665 + WN204505:00:00→12:56:00 5h 56m 1 stop via DEN · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-28Southwest AirlinesWN1053 + WN1260 / WN665 + WN204517:00:00→00:55:00 5h 55m 1 stop via LAS · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-28United Airlines / Southwest AirlinesUA2446 + UA652 / WN665 + WN204505:00:00→12:56:00 5h 56m 1 stop via DEN · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-29Southwest AirlinesWN1053 + WN1260 / WN665 + WN204517:00:00→00:55:00 5h 55m 1 stop via LAS · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-29United Airlines / Southwest AirlinesUA2446 + UA652 / WN665 + WN204505:00:00→12:56:00 5h 56m 1 stop via DEN · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-30Southwest AirlinesWN1053 + WN1260 / WN665 + WN204517:00:00→00:55:00 5h 55m 1 stop via LAS · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $384.002026-10-29T01:52:39Z
2026-12-17 → 2026-12-30United Airlines / Southwest AirlinesUA2446 + UA652 / WN665 + WN204505:00:00→12:56:00 5h 56m 1 stop via DEN · 10:35:00→15:10:00 6h 35m 1 stop via BNAAxel-exclusive $391.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-31United Airlines / Frontier AirlinesUA2446 + UA652 / F93107 + F9192305:00:00→12:56:00 5h 56m 1 stop via DEN · 14:02:00→18:31:00 6h 29m 1 stop via LASAxel-exclusive $293.502026-10-29T01:52:39Z
2026-12-17 → 2026-12-31Delta Air Lines / Frontier AirlinesDL1787 + DL2666 / F93107 + F9192313:11:00→21:18:00 6h 07m 1 stop via SLC · 14:02:00→18:31:00 6h 29m 1 stop via LASAxel-exclusive $303.502026-10-29T01:52:39Z

Hotels in St. Louis for these trips

Hotels: under a trip, hotels in St. Louis for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in St. Louis

Route overview: Los Angeles to Saint Louis (STL) flight deals

2026-12-17 · one way · Axel-exclusive $165.00

  • Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
    • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
    • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.

2026-12-17 · one way · Axel-exclusive $175.00

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.

2026-12-17 → 2026-12-18 · Axel-exclusive $257.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Frontier Airlines F94567 / F91261: STL 2026-12-18 19:58:00 → ONT 2026-12-19 00:14:00; 1 stop(s) via DEN; 376 minutes. Local airport times.
    • F94567: STL 2026-12-18 19:58:00 → DEN 2026-12-18 21:29:00; layover at DEN: 83 minutes.
    • F91261: DEN 2026-12-18 22:52:00 → ONT 2026-12-19 00:14:00.

2026-12-17 → 2026-12-18 · Axel-exclusive $267.50

  • Delta Air Lines DL1787 / DL2666: ONT 2026-12-17 13:11:00 → STL 2026-12-17 21:18:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
    • DL1787: ONT 2026-12-17 13:11:00 → SLC 2026-12-17 16:04:00; layover at SLC: 86 minutes.
    • DL2666: SLC 2026-12-17 17:30:00 → STL 2026-12-17 21:18:00.
  • Frontier Airlines F94567 / F91261: STL 2026-12-18 19:58:00 → ONT 2026-12-19 00:14:00; 1 stop(s) via DEN; 376 minutes. Local airport times.
    • F94567: STL 2026-12-18 19:58:00 → DEN 2026-12-18 21:29:00; layover at DEN: 83 minutes.
    • F91261: DEN 2026-12-18 22:52:00 → ONT 2026-12-19 00:14:00.

2026-12-17 → 2026-12-19 · Axel-exclusive $384.00

  • Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
    • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
    • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
  • Southwest Airlines WN2467 / WN3481: STL 2026-12-19 18:40:00 → ONT 2026-12-19 23:05:00; 1 stop(s) via PHX; 385 minutes. Local airport times.
    • WN2467: STL 2026-12-19 18:40:00 → PHX 2026-12-19 21:00:00; layover at PHX: 105 minutes.
    • WN3481: PHX 2026-12-19 22:45:00 → ONT 2026-12-19 23:05:00.

2026-12-17 → 2026-12-19 · Axel-exclusive $391.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Southwest Airlines WN2467 / WN3481: STL 2026-12-19 18:40:00 → ONT 2026-12-19 23:05:00; 1 stop(s) via PHX; 385 minutes. Local airport times.
    • WN2467: STL 2026-12-19 18:40:00 → PHX 2026-12-19 21:00:00; layover at PHX: 105 minutes.
    • WN3481: PHX 2026-12-19 22:45:00 → ONT 2026-12-19 23:05:00.

2026-12-17 → 2026-12-20 · Axel-exclusive $384.00

  • Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
    • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
    • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-20 10:35:00 → ONT 2026-12-20 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-20 10:35:00 → BNA 2026-12-20 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-20 12:40:00 → ONT 2026-12-20 15:10:00.

2026-12-17 → 2026-12-20 · Axel-exclusive $391.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-20 10:35:00 → ONT 2026-12-20 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-20 10:35:00 → BNA 2026-12-20 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-20 12:40:00 → ONT 2026-12-20 15:10:00.

2026-12-17 → 2026-12-21 · Axel-exclusive $384.00

  • Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
    • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
    • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-21 10:35:00 → ONT 2026-12-21 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-21 10:35:00 → BNA 2026-12-21 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-21 12:40:00 → ONT 2026-12-21 15:10:00.

2026-12-17 → 2026-12-21 · Axel-exclusive $391.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-21 10:35:00 → ONT 2026-12-21 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-21 10:35:00 → BNA 2026-12-21 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-21 12:40:00 → ONT 2026-12-21 15:10:00.

2026-12-17 → 2026-12-23 · Axel-exclusive $384.00

  • Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
    • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
    • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-23 10:35:00 → ONT 2026-12-23 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-23 10:35:00 → BNA 2026-12-23 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-23 12:40:00 → ONT 2026-12-23 15:10:00.

2026-12-17 → 2026-12-23 · Axel-exclusive $391.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-23 10:35:00 → ONT 2026-12-23 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-23 10:35:00 → BNA 2026-12-23 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-23 12:40:00 → ONT 2026-12-23 15:10:00.

2026-12-17 → 2026-12-24 · Axel-exclusive $293.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Frontier Airlines F93107 / F91923: STL 2026-12-24 14:02:00 → ONT 2026-12-24 18:31:00; 1 stop(s) via LAS; 389 minutes. Local airport times.
    • F93107: STL 2026-12-24 14:02:00 → LAS 2026-12-24 15:38:00; layover at LAS: 107 minutes.
    • F91923: LAS 2026-12-24 17:25:00 → ONT 2026-12-24 18:31:00.

2026-12-17 → 2026-12-24 · Axel-exclusive $303.50

  • Delta Air Lines DL1787 / DL2666: ONT 2026-12-17 13:11:00 → STL 2026-12-17 21:18:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
    • DL1787: ONT 2026-12-17 13:11:00 → SLC 2026-12-17 16:04:00; layover at SLC: 86 minutes.
    • DL2666: SLC 2026-12-17 17:30:00 → STL 2026-12-17 21:18:00.
  • Frontier Airlines F93107 / F91923: STL 2026-12-24 14:02:00 → ONT 2026-12-24 18:31:00; 1 stop(s) via LAS; 389 minutes. Local airport times.
    • F93107: STL 2026-12-24 14:02:00 → LAS 2026-12-24 15:38:00; layover at LAS: 107 minutes.
    • F91923: LAS 2026-12-24 17:25:00 → ONT 2026-12-24 18:31:00.

2026-12-17 → 2026-12-25 · Axel-exclusive $293.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Frontier Airlines F94567 / F91261: STL 2026-12-25 19:58:00 → ONT 2026-12-26 00:14:00; 1 stop(s) via DEN; 376 minutes. Local airport times.
    • F94567: STL 2026-12-25 19:58:00 → DEN 2026-12-25 21:29:00; layover at DEN: 83 minutes.
    • F91261: DEN 2026-12-25 22:52:00 → ONT 2026-12-26 00:14:00.

2026-12-17 → 2026-12-25 · Axel-exclusive $303.50

  • Delta Air Lines DL1787 / DL2666: ONT 2026-12-17 13:11:00 → STL 2026-12-17 21:18:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
    • DL1787: ONT 2026-12-17 13:11:00 → SLC 2026-12-17 16:04:00; layover at SLC: 86 minutes.
    • DL2666: SLC 2026-12-17 17:30:00 → STL 2026-12-17 21:18:00.
  • Frontier Airlines F94567 / F91261: STL 2026-12-25 19:58:00 → ONT 2026-12-26 00:14:00; 1 stop(s) via DEN; 376 minutes. Local airport times.
    • F94567: STL 2026-12-25 19:58:00 → DEN 2026-12-25 21:29:00; layover at DEN: 83 minutes.
    • F91261: DEN 2026-12-25 22:52:00 → ONT 2026-12-26 00:14:00.

2026-12-17 → 2026-12-27 · Axel-exclusive $384.00

  • Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
    • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
    • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-27 10:35:00 → ONT 2026-12-27 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-27 10:35:00 → BNA 2026-12-27 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-27 12:40:00 → ONT 2026-12-27 15:10:00.

2026-12-17 → 2026-12-27 · Axel-exclusive $391.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-27 10:35:00 → ONT 2026-12-27 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-27 10:35:00 → BNA 2026-12-27 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-27 12:40:00 → ONT 2026-12-27 15:10:00.

2026-12-17 → 2026-12-28 · Axel-exclusive $384.00

  • Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
    • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
    • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-28 10:35:00 → ONT 2026-12-28 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-28 10:35:00 → BNA 2026-12-28 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-28 12:40:00 → ONT 2026-12-28 15:10:00.

2026-12-17 → 2026-12-28 · Axel-exclusive $391.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-28 10:35:00 → ONT 2026-12-28 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-28 10:35:00 → BNA 2026-12-28 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-28 12:40:00 → ONT 2026-12-28 15:10:00.

2026-12-17 → 2026-12-29 · Axel-exclusive $384.00

  • Southwest Airlines WN1053 / WN1260: ONT 2026-12-17 17:00:00 → STL 2026-12-18 00:55:00; 1 stop(s) via LAS; 355 minutes. Local airport times.
    • WN1053: ONT 2026-12-17 17:00:00 → LAS 2026-12-17 18:05:00; layover at LAS: 100 minutes.
    • WN1260: LAS 2026-12-17 19:45:00 → STL 2026-12-18 00:55:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-29 10:35:00 → ONT 2026-12-29 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-29 10:35:00 → BNA 2026-12-29 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-29 12:40:00 → ONT 2026-12-29 15:10:00.

2026-12-17 → 2026-12-29 · Axel-exclusive $391.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Southwest Airlines WN665 / WN2045: STL 2026-12-29 10:35:00 → ONT 2026-12-29 15:10:00; 1 stop(s) via BNA; 395 minutes. Local airport times.
    • WN665: STL 2026-12-29 10:35:00 → BNA 2026-12-29 11:40:00; layover at BNA: 60 minutes.
    • WN2045: BNA 2026-12-29 12:40:00 → ONT 2026-12-29 15:10:00.

2026-12-17 → 2026-12-31 · Axel-exclusive $293.50

  • United Airlines UA2446 / UA652: ONT 2026-12-17 05:00:00 → STL 2026-12-17 12:56:00; 1 stop(s) via DEN; 356 minutes. Local airport times.
    • UA2446: ONT 2026-12-17 05:00:00 → DEN 2026-12-17 08:17:00; layover at DEN: 93 minutes.
    • UA652: DEN 2026-12-17 09:50:00 → STL 2026-12-17 12:56:00.
  • Frontier Airlines F93107 / F91923: STL 2026-12-31 14:02:00 → ONT 2026-12-31 18:31:00; 1 stop(s) via LAS; 389 minutes. Local airport times.
    • F93107: STL 2026-12-31 14:02:00 → LAS 2026-12-31 15:38:00; layover at LAS: 107 minutes.
    • F91923: LAS 2026-12-31 17:25:00 → ONT 2026-12-31 18:31:00.

2026-12-17 → 2026-12-31 · Axel-exclusive $303.50

  • Delta Air Lines DL1787 / DL2666: ONT 2026-12-17 13:11:00 → STL 2026-12-17 21:18:00; 1 stop(s) via SLC; 367 minutes. Local airport times.
    • DL1787: ONT 2026-12-17 13:11:00 → SLC 2026-12-17 16:04:00; layover at SLC: 86 minutes.
    • DL2666: SLC 2026-12-17 17:30:00 → STL 2026-12-17 21:18:00.
  • Frontier Airlines F93107 / F91923: STL 2026-12-31 14:02:00 → ONT 2026-12-31 18:31:00; 1 stop(s) via LAS; 389 minutes. Local airport times.
    • F93107: STL 2026-12-31 14:02:00 → LAS 2026-12-31 15:38:00; layover at LAS: 107 minutes.
    • F91923: LAS 2026-12-31 17:25:00 → ONT 2026-12-31 18:31:00.

Explore this route

For AI assistants

  • This page: Ontario (ONT) to Saint Louis (STL) · Dec 17, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in St. Louis for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested trip.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Los Angeles to Saint Louis (STL) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.