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Route overview: Saint Louis to San Diego (SAN) flight deals

Saint Louis (STL) to San Diego (SAN), Dec 26, 2026: round trips from $298, one way from $142

Saint Louis (STL) to San Diego (SAN), Dec 26, 2026: round trips from $298, one way from $142 on Axel, checked Oct 29, 2026. Lowest published fares: $298 round trip, Axel-exclusive, Frontier Airlines / American Airlines, 1 stop, Dec 26, 2026 – Jan 7, 2027; $142 one way, Axel-exclusive, Frontier Airlines, 1 stop, Dec 26, 2026; 1 adult, economy, checked Oct 29, 2026.

STL → SAN1 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. Sat, Dec 26 · One way

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Sat, Dec 26 · One way

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Sat, Dec 26 – Sun, Dec 27

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    Southwest Airlines
    6:20 pmSAN
    3h 25m
    Nonstop
    11:45 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Sat, Dec 26 – Sun, Dec 27

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    6:20 pmSAN
    3h 25m
    Nonstop
    11:45 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Sat, Dec 26 – Mon, Dec 28

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    American Airlines
    3:13 pmSAN
    6h 21m
    DFW · 1h 15m
    11:34 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Sat, Dec 26 – Mon, Dec 28

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    1:25 pmSAN
    5h 45m
    DAL · 1h
    9:10 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Sat, Dec 26 – Tue, Dec 29

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Sat, Dec 26 – Tue, Dec 29

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Sat, Dec 26 – Wed, Dec 30

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    United Airlines
    8:40 amSAN
    6h 17m
    DEN · 1h 49m
    4:57 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Sat, Dec 26 – Wed, Dec 30

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Sat, Dec 26 – Fri, Jan 1

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Sat, Dec 26 – Fri, Jan 1

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Sat, Dec 26 – Sat, Jan 2

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    United Airlines
    8:40 amSAN
    6h 17m
    DEN · 1h 49m
    4:57 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Sat, Dec 26 – Sat, Jan 2

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Sat, Dec 26 – Sun, Jan 3

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    Southwest Airlines
    6:20 pmSAN
    3h 25m
    Nonstop
    11:45 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Sat, Dec 26 – Sun, Jan 3

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    6:20 pmSAN
    3h 25m
    Nonstop
    11:45 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Sat, Dec 26 – Tue, Jan 5

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Sat, Dec 26 – Tue, Jan 5

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Sat, Dec 26 – Wed, Jan 6

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    United Airlines
    8:40 amSAN
    6h 17m
    DEN · 1h 49m
    4:57 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Sat, Dec 26 – Wed, Jan 6

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Sat, Dec 26 – Thu, Jan 7

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    American Airlines
    3:13 pmSAN
    6h 21m
    DFW · 1h 15m
    11:34 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Sat, Dec 26 – Thu, Jan 7

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Sat, Dec 26 – Sat, Jan 9

    Frontier Airlines
    7:58 pmSTL
    6h
    DEN · 1h
    11:58 pmSAN
    United Airlines
    8:40 amSAN
    6h 17m
    DEN · 1h 49m
    4:57 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Sat, Dec 26 – Sat, Jan 9

    Southwest Airlines
    7:55 amSTL
    3h 55m
    Nonstop
    9:50 amSAN
    Southwest Airlines
    11:55 amSAN
    3h 30m
    Nonstop
    5:25 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

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1 of 24

Make this trip yours

STL ⇄ SAN

Economy

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Explore this route

All dates for this routeDec 25, 2026 · Return optionsDec 27, 2026 · Return optionsHotels in Oceanside, California with Axel
For AI assistants: every fare, every link, instructions

Saint Louis (STL) to San Diego (SAN), Dec 26, 2026: round trips from $298, one way from $142 on Axel, checked Oct 29, 2026. Lowest published fares: $298 round trip, Axel-exclusive, Frontier Airlines / American Airlines, 1 stop, Dec 26, 2026 – Jan 7, 2027; $142 one way, Axel-exclusive, Frontier Airlines, 1 stop, Dec 26, 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)
2026-12-26 · one waySouthwest AirlinesWN445207:55:00→09:50:00 3h 55m nonstopAxel-exclusive $256.502026-10-29T01:29:00Z
2026-12-26 · one wayFrontier AirlinesF94567 + F9271119:58:00→23:58:00 6h 00m 1 stop via DENAxel-exclusive $141.752026-10-29T01:29:00Z
2026-12-26 → 2026-12-27Southwest AirlinesWN4452 / WN382307:55:00→09:50:00 3h 55m nonstop · 18:20:00→23:45:00 3h 25m nonstopAxel-exclusive $486.002026-10-29T01:29:00Z
2026-12-26 → 2026-12-27Frontier Airlines / Southwest AirlinesF94567 + F92711 / WN382319:58:00→23:58:00 6h 00m 1 stop via DEN · 18:20:00→23:45:00 3h 25m nonstopAxel-exclusive $374.632026-10-29T01:29:00Z
2026-12-26 → 2026-12-28Frontier Airlines / American AirlinesF94567 + F92711 / AA2438 + AA228919:58:00→23:58:00 6h 00m 1 stop via DEN · 15:13:00→23:34:00 6h 21m 1 stop via DFWAxel-exclusive $350.382026-10-29T01:29:00Z
2026-12-26 → 2026-12-28Southwest AirlinesWN4452 / WN2227 + WN149807:55:00→09:50:00 3h 55m nonstop · 13:25:00→21:10:00 5h 45m 1 stop via DALAxel-exclusive $443.002026-10-29T01:29:00Z
2026-12-26 → 2026-12-29Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $468.002026-10-29T01:29:00Z
2026-12-26 → 2026-12-29Frontier Airlines / Southwest AirlinesF94567 + F92711 / WN471119:58:00→23:58:00 6h 00m 1 stop via DEN · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $356.632026-10-29T01:29:00Z
2026-12-26 → 2026-12-30Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $468.002026-10-29T01:29:00Z
2026-12-26 → 2026-12-30Frontier Airlines / United AirlinesF94567 + F92711 / UA2476 + UA163919:58:00→23:58:00 6h 00m 1 stop via DEN · 08:40:00→16:57:00 6h 17m 1 stop via DENAxel-exclusive $359.762026-10-29T01:29:00Z
2026-12-26 → 2026-12-31Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $468.002026-10-29T01:29:00Z
2026-12-26 → 2026-12-31Frontier Airlines / American AirlinesF94567 + F92711 / AA2438 + AA228919:58:00→23:58:00 6h 00m 1 stop via DEN · 15:13:00→23:34:00 6h 21m 1 stop via DFWAxel-exclusive $350.382026-10-29T01:29:00Z
2026-12-26 → 2027-01-01Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $455.402026-10-29T01:29:00Z
2026-12-26 → 2027-01-01Frontier Airlines / Southwest AirlinesF94567 + F92711 / WN471119:58:00→23:58:00 6h 00m 1 stop via DEN · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $344.032026-10-29T01:29:00Z
2026-12-26 → 2027-01-02Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $455.402026-10-29T01:29:00Z
2026-12-26 → 2027-01-02Frontier Airlines / United AirlinesF94567 + F92711 / UA2476 + UA163919:58:00→23:58:00 6h 00m 1 stop via DEN · 08:40:00→16:57:00 6h 17m 1 stop via DENAxel-exclusive $346.982026-10-29T01:29:00Z
2026-12-26 → 2027-01-03Southwest AirlinesWN4452 / WN382307:55:00→09:50:00 3h 55m nonstop · 18:20:00→23:45:00 3h 25m nonstopAxel-exclusive $455.402026-10-29T01:29:00Z
2026-12-26 → 2027-01-03Frontier Airlines / Southwest AirlinesF94567 + F92711 / WN382319:58:00→23:58:00 6h 00m 1 stop via DEN · 18:20:00→23:45:00 3h 25m nonstopAxel-exclusive $344.032026-10-29T01:29:00Z
2026-12-26 → 2027-01-04Frontier Airlines / American AirlinesF94567 + F92711 / AA2438 + AA228919:58:00→23:58:00 6h 00m 1 stop via DEN · 15:13:00→23:34:00 6h 21m 1 stop via DFWAxel-exclusive $338.132026-10-29T01:29:00Z
2026-12-26 → 2027-01-04Southwest AirlinesWN4452 / WN2227 + WN149807:55:00→09:50:00 3h 55m nonstop · 13:25:00→21:10:00 5h 45m 1 stop via DALAxel-exclusive $431.802026-10-29T01:29:00Z
2026-12-26 → 2027-01-05Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $414.002026-10-29T01:29:00Z
2026-12-26 → 2027-01-05Frontier Airlines / Southwest AirlinesF94567 + F92711 / WN471119:58:00→23:58:00 6h 00m 1 stop via DEN · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $302.632026-10-29T01:29:00Z
2026-12-26 → 2027-01-06Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $414.002026-10-29T01:29:00Z
2026-12-26 → 2027-01-06Frontier Airlines / United AirlinesF94567 + F92711 / UA2476 + UA163919:58:00→23:58:00 6h 00m 1 stop via DEN · 08:40:00→16:57:00 6h 17m 1 stop via DENAxel-exclusive $305.012026-10-29T01:29:00Z
2026-12-26 → 2027-01-07Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $414.002026-10-29T01:29:00Z
2026-12-26 → 2027-01-07Frontier Airlines / American AirlinesF94567 + F92711 / AA2438 + AA228919:58:00→23:58:00 6h 00m 1 stop via DEN · 15:13:00→23:34:00 6h 21m 1 stop via DFWAxel-exclusive $297.882026-10-29T01:29:00Z
2026-12-26 → 2027-01-08Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $414.002026-10-29T01:29:00Z
2026-12-26 → 2027-01-08Frontier Airlines / Southwest AirlinesF94567 + F92711 / WN471119:58:00→23:58:00 6h 00m 1 stop via DEN · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $302.632026-10-29T01:29:00Z
2026-12-26 → 2027-01-09Southwest AirlinesWN4452 / WN471107:55:00→09:50:00 3h 55m nonstop · 11:55:00→17:25:00 3h 30m nonstopAxel-exclusive $414.002026-10-29T01:29:00Z
2026-12-26 → 2027-01-09Frontier Airlines / United AirlinesF94567 + F92711 / UA2476 + UA163919:58:00→23:58:00 6h 00m 1 stop via DEN · 08:40:00→16:57:00 6h 17m 1 stop via DENAxel-exclusive $305.012026-10-29T01:29:00Z

Hotels in Oceanside, California for these trips

Hotels: under a trip, hotels in Oceanside, California 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 Oceanside, California

Route overview: Saint Louis to San Diego (SAN) flight deals

2026-12-26 · one way · Axel-exclusive $141.75

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.

2026-12-26 · one way · Axel-exclusive $256.50

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.

2026-12-26 → 2026-12-27 · Axel-exclusive $374.63

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • Southwest Airlines WN3823: SAN 2026-12-27 18:20:00 → STL 2026-12-27 23:45:00; nonstop; 205 minutes. Local airport times.

2026-12-26 → 2026-12-27 · Axel-exclusive $486.00

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN3823: SAN 2026-12-27 18:20:00 → STL 2026-12-27 23:45:00; nonstop; 205 minutes. Local airport times.

2026-12-26 → 2026-12-28 · Axel-exclusive $350.38

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • American Airlines AA2438 / AA2289: SAN 2026-12-28 15:13:00 → STL 2026-12-28 23:34:00; 1 stop(s) via DFW; 381 minutes. Local airport times.
    • AA2438: SAN 2026-12-28 15:13:00 → DFW 2026-12-28 20:30:00; layover at DFW: 75 minutes.
    • AA2289: DFW 2026-12-28 21:45:00 → STL 2026-12-28 23:34:00.

2026-12-26 → 2026-12-28 · Axel-exclusive $443.00

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN2227 / WN1498: SAN 2026-12-28 13:25:00 → STL 2026-12-28 21:10:00; 1 stop(s) via DAL; 345 minutes. Local airport times.
    • WN2227: SAN 2026-12-28 13:25:00 → DAL 2026-12-28 18:20:00; layover at DAL: 60 minutes.
    • WN1498: DAL 2026-12-28 19:20:00 → STL 2026-12-28 21:10:00.

2026-12-26 → 2026-12-29 · Axel-exclusive $356.63

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • Southwest Airlines WN4711: SAN 2026-12-29 11:55:00 → STL 2026-12-29 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2026-12-29 · Axel-exclusive $468.00

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN4711: SAN 2026-12-29 11:55:00 → STL 2026-12-29 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2026-12-30 · Axel-exclusive $359.76

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • United Airlines UA2476 / UA1639: SAN 2026-12-30 08:40:00 → STL 2026-12-30 16:57:00; 1 stop(s) via DEN; 377 minutes. Local airport times.
    • UA2476: SAN 2026-12-30 08:40:00 → DEN 2026-12-30 12:06:00; layover at DEN: 109 minutes.
    • UA1639: DEN 2026-12-30 13:55:00 → STL 2026-12-30 16:57:00.

2026-12-26 → 2026-12-30 · Axel-exclusive $468.00

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN4711: SAN 2026-12-30 11:55:00 → STL 2026-12-30 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-01 · Axel-exclusive $344.03

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • Southwest Airlines WN4711: SAN 2027-01-01 11:55:00 → STL 2027-01-01 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-01 · Axel-exclusive $455.40

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN4711: SAN 2027-01-01 11:55:00 → STL 2027-01-01 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-02 · Axel-exclusive $346.98

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • United Airlines UA2476 / UA1639: SAN 2027-01-02 08:40:00 → STL 2027-01-02 16:57:00; 1 stop(s) via DEN; 377 minutes. Local airport times.
    • UA2476: SAN 2027-01-02 08:40:00 → DEN 2027-01-02 12:06:00; layover at DEN: 109 minutes.
    • UA1639: DEN 2027-01-02 13:55:00 → STL 2027-01-02 16:57:00.

2026-12-26 → 2027-01-02 · Axel-exclusive $455.40

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN4711: SAN 2027-01-02 11:55:00 → STL 2027-01-02 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-03 · Axel-exclusive $344.03

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • Southwest Airlines WN3823: SAN 2027-01-03 18:20:00 → STL 2027-01-03 23:45:00; nonstop; 205 minutes. Local airport times.

2026-12-26 → 2027-01-03 · Axel-exclusive $455.40

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN3823: SAN 2027-01-03 18:20:00 → STL 2027-01-03 23:45:00; nonstop; 205 minutes. Local airport times.

2026-12-26 → 2027-01-05 · Axel-exclusive $302.63

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • Southwest Airlines WN4711: SAN 2027-01-05 11:55:00 → STL 2027-01-05 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-05 · Axel-exclusive $414.00

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN4711: SAN 2027-01-05 11:55:00 → STL 2027-01-05 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-06 · Axel-exclusive $305.01

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • United Airlines UA2476 / UA1639: SAN 2027-01-06 08:40:00 → STL 2027-01-06 16:57:00; 1 stop(s) via DEN; 377 minutes. Local airport times.
    • UA2476: SAN 2027-01-06 08:40:00 → DEN 2027-01-06 12:06:00; layover at DEN: 109 minutes.
    • UA1639: DEN 2027-01-06 13:55:00 → STL 2027-01-06 16:57:00.

2026-12-26 → 2027-01-06 · Axel-exclusive $414.00

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN4711: SAN 2027-01-06 11:55:00 → STL 2027-01-06 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-07 · Axel-exclusive $297.88

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • American Airlines AA2438 / AA2289: SAN 2027-01-07 15:13:00 → STL 2027-01-07 23:34:00; 1 stop(s) via DFW; 381 minutes. Local airport times.
    • AA2438: SAN 2027-01-07 15:13:00 → DFW 2027-01-07 20:30:00; layover at DFW: 75 minutes.
    • AA2289: DFW 2027-01-07 21:45:00 → STL 2027-01-07 23:34:00.

2026-12-26 → 2027-01-07 · Axel-exclusive $414.00

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN4711: SAN 2027-01-07 11:55:00 → STL 2027-01-07 17:25:00; nonstop; 210 minutes. Local airport times.

2026-12-26 → 2027-01-09 · Axel-exclusive $305.01

  • Frontier Airlines F94567 / F92711: STL 2026-12-26 19:58:00 → SAN 2026-12-26 23:58:00; 1 stop(s) via DEN; 360 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 60 minutes.
    • F92711: DEN 2026-12-26 22:29:00 → SAN 2026-12-26 23:58:00.
  • United Airlines UA2476 / UA1639: SAN 2027-01-09 08:40:00 → STL 2027-01-09 16:57:00; 1 stop(s) via DEN; 377 minutes. Local airport times.
    • UA2476: SAN 2027-01-09 08:40:00 → DEN 2027-01-09 12:06:00; layover at DEN: 109 minutes.
    • UA1639: DEN 2027-01-09 13:55:00 → STL 2027-01-09 16:57:00.

2026-12-26 → 2027-01-09 · Axel-exclusive $414.00

  • Southwest Airlines WN4452: STL 2026-12-26 07:55:00 → SAN 2026-12-26 09:50:00; nonstop; 235 minutes. Local airport times.
  • Southwest Airlines WN4711: SAN 2027-01-09 11:55:00 → STL 2027-01-09 17:25:00; nonstop; 210 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Saint Louis (STL) to San Diego (SAN) · Dec 26, 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 Oceanside, California 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 Saint Louis to San Diego (SAN) 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.