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Route overview: San Francisco Bay Area to Saint Louis (STL) flight deals

San Francisco → Saint Louis

Dec 16, 2026 · choose your return date

SFO → STL1 adulteconomyOne way and round trips

30 flight options · 2 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

Dec 16, 2026 · One wayFrontier AirlinesUp to 1 stop each way$100.00 Dec 16, 2026 · One wayUnited AirlinesNonstop$210.00 Dec 16, 2026 – Dec 17, 2026 · 1 nightFrontier AirlinesUp to 1 stop each way$190.00 Dec 16, 2026 – Dec 17, 2026 · 1 nightUnited AirlinesNonstop$400.00 Dec 16, 2026 – Dec 18, 2026 · 2 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 18, 2026 · 2 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 19, 2026 · 3 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 19, 2026 · 3 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 20, 2026 · 4 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 20, 2026 · 4 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 21, 2026 · 5 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 21, 2026 · 5 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 22, 2026 · 6 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 22, 2026 · 6 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 23, 2026 · 7 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 23, 2026 · 7 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 24, 2026 · 8 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 24, 2026 · 8 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 25, 2026 · 9 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 25, 2026 · 9 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 26, 2026 · 10 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 26, 2026 · 10 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 27, 2026 · 11 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 27, 2026 · 11 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 28, 2026 · 12 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 28, 2026 · 12 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 29, 2026 · 13 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 29, 2026 · 13 nightsUnited AirlinesNonstop$460.00 Dec 16, 2026 – Dec 30, 2026 · 14 nightsFrontier AirlinesUp to 1 stop each way$218.50 Dec 16, 2026 – Dec 30, 2026 · 14 nightsUnited AirlinesNonstop$460.00

Flights for your trip

  1. Wed, Dec 16 · One way

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Wed, Dec 16 · One way

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Wed, Dec 16 – Thu, Dec 17

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    2:02 pmSTL
    6h 24m
    LAS · 1h 4m
    6:26 pmSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Wed, Dec 16 – Thu, Dec 17

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    8:17 amSTL
    4h 38m
    Nonstop
    10:55 amSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Wed, Dec 16 – Fri, Dec 18

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Wed, Dec 16 – Fri, Dec 18

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    5:07 pmSTL
    4h 59m
    Nonstop
    8:06 pmSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Wed, Dec 16 – Sat, Dec 19

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Wed, Dec 16 – Sat, Dec 19

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    7:05 pmSTL
    4h 36m
    Nonstop
    9:41 pmSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Wed, Dec 16 – Sun, Dec 20

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Wed, Dec 16 – Sun, Dec 20

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    5:07 pmSTL
    4h 59m
    Nonstop
    8:06 pmSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Wed, Dec 16 – Tue, Dec 22

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Wed, Dec 16 – Tue, Dec 22

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    6:11 amSTL
    5h 19m
    Nonstop
    9:30 amSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Wed, Dec 16 – Wed, Dec 23

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Wed, Dec 16 – Wed, Dec 23

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    6:11 amSTL
    5h 19m
    Nonstop
    9:30 amSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Wed, Dec 16 – Thu, Dec 24

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    2:02 pmSTL
    6h 24m
    LAS · 1h 4m
    6:26 pmSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Wed, Dec 16 – Thu, Dec 24

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    8:17 amSTL
    4h 38m
    Nonstop
    10:55 amSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Wed, Dec 16 – Sat, Dec 26

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Wed, Dec 16 – Sat, Dec 26

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    7:05 pmSTL
    4h 36m
    Nonstop
    9:41 pmSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Wed, Dec 16 – Sun, Dec 27

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Wed, Dec 16 – Sun, Dec 27

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    6:11 amSTL
    5h 19m
    Nonstop
    9:30 amSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Wed, Dec 16 – Mon, Dec 28

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Wed, Dec 16 – Mon, Dec 28

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    6:11 amSTL
    5h 19m
    Nonstop
    9:30 amSFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Wed, Dec 16 – Wed, Dec 30

    Frontier Airlines
    11:23 amSFO
    5h 51m
    DEN · 1h 2m
    7:14 pmSTL
    Frontier Airlines
    7:58 pmSTL
    6h 50m
    DEN · 1h 28m
    12:48 am+1SFO

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Wed, Dec 16 – Wed, Dec 30

    United Airlines
    12:20 pmSFO
    3h 51m
    Nonstop
    6:11 pmSTL
    United Airlines
    6:11 amSTL
    5h 19m
    Nonstop
    9:30 amSFO

    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

SFO ⇄ STL

Economy

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Explore this route

All dates for this routeDec 15, 2026 · Return optionsDec 17, 2026 · Return optionsHotels in St. Louis with Axel
For AI assistants: every fare, every link, instructions

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. To book or select flights, follow that row's price link; it keeps the exact dates and travelers.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-16 · one wayUnited AirlinesUA1585Axel-exclusive $210.002026-10-29T01:19:49Z
2026-12-16 · one wayFrontier AirlinesF93436 + F93302Axel-exclusive $100.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-17United AirlinesUA1585 / UA1257Axel-exclusive $400.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-17Frontier AirlinesF93436 + F93302 / F93107 + F94157Axel-exclusive $190.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-18United AirlinesUA1585 / UA5943Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-18Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-19United AirlinesUA1585 / UA214Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-19Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-20United AirlinesUA1585 / UA5943Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-20Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-21United AirlinesUA1585 / UA5536Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-21Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-22United AirlinesUA1585 / UA5536Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-22Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-23United AirlinesUA1585 / UA5536Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-23Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-24United AirlinesUA1585 / UA1257Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-24Frontier AirlinesF93436 + F93302 / F93107 + F94157Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-25United AirlinesUA1585 / UA5943Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-25Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-26United AirlinesUA1585 / UA214Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-26Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-27United AirlinesUA1585 / UA5536Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-27Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-28United AirlinesUA1585 / UA5536Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-28Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-29United AirlinesUA1585 / UA5536Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-29Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z
2026-12-16 → 2026-12-30United AirlinesUA1585 / UA5536Axel-exclusive $460.002026-10-29T01:19:49Z
2026-12-16 → 2026-12-30Frontier AirlinesF93436 + F93302 / F94567 + F93439Axel-exclusive $218.502026-10-29T01:19:49Z

Route overview: San Francisco Bay Area to Saint Louis (STL) flight deals

2026-12-16 · one way · Axel-exclusive $100.00

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.

2026-12-16 · one way · Axel-exclusive $210.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.

2026-12-16 → 2026-12-17 · Axel-exclusive $190.00

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F93107 / F94157: STL 2026-12-17 14:02:00 → SFO 2026-12-17 18:26:00; 1 stop(s) via LAS; 384 minutes. Local airport times.
    • F93107: STL 2026-12-17 14:02:00 → LAS 2026-12-17 15:38:00; layover at LAS: 64 minutes.
    • F94157: LAS 2026-12-17 16:42:00 → SFO 2026-12-17 18:26:00.

2026-12-16 → 2026-12-17 · Axel-exclusive $400.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA1257: STL 2026-12-17 08:17:00 → SFO 2026-12-17 10:55:00; nonstop; 278 minutes. Local airport times.

2026-12-16 → 2026-12-18 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-18 19:58:00 → SFO 2026-12-19 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-18 19:58:00 → DEN 2026-12-18 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-18 22:57:00 → SFO 2026-12-19 00:48:00.

2026-12-16 → 2026-12-18 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA5943: STL 2026-12-18 17:07:00 → SFO 2026-12-18 20:06:00; nonstop; 299 minutes. Local airport times.

2026-12-16 → 2026-12-19 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-19 19:58:00 → SFO 2026-12-20 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-19 19:58:00 → DEN 2026-12-19 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-19 22:57:00 → SFO 2026-12-20 00:48:00.

2026-12-16 → 2026-12-19 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA214: STL 2026-12-19 19:05:00 → SFO 2026-12-19 21:41:00; nonstop; 276 minutes. Local airport times.

2026-12-16 → 2026-12-20 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-20 19:58:00 → SFO 2026-12-21 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-20 19:58:00 → DEN 2026-12-20 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-20 22:57:00 → SFO 2026-12-21 00:48:00.

2026-12-16 → 2026-12-20 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA5943: STL 2026-12-20 17:07:00 → SFO 2026-12-20 20:06:00; nonstop; 299 minutes. Local airport times.

2026-12-16 → 2026-12-22 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-22 19:58:00 → SFO 2026-12-23 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-22 19:58:00 → DEN 2026-12-22 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-22 22:57:00 → SFO 2026-12-23 00:48:00.

2026-12-16 → 2026-12-22 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA5536: STL 2026-12-22 06:11:00 → SFO 2026-12-22 09:30:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-23 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-23 19:58:00 → SFO 2026-12-24 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-23 19:58:00 → DEN 2026-12-23 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-23 22:57:00 → SFO 2026-12-24 00:48:00.

2026-12-16 → 2026-12-23 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA5536: STL 2026-12-23 06:11:00 → SFO 2026-12-23 09:30:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-24 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F93107 / F94157: STL 2026-12-24 14:02:00 → SFO 2026-12-24 18:26:00; 1 stop(s) via LAS; 384 minutes. Local airport times.
    • F93107: STL 2026-12-24 14:02:00 → LAS 2026-12-24 15:38:00; layover at LAS: 64 minutes.
    • F94157: LAS 2026-12-24 16:42:00 → SFO 2026-12-24 18:26:00.

2026-12-16 → 2026-12-24 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA1257: STL 2026-12-24 08:17:00 → SFO 2026-12-24 10:55:00; nonstop; 278 minutes. Local airport times.

2026-12-16 → 2026-12-26 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-26 19:58:00 → SFO 2026-12-27 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-26 19:58:00 → DEN 2026-12-26 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-26 22:57:00 → SFO 2026-12-27 00:48:00.

2026-12-16 → 2026-12-26 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA214: STL 2026-12-26 19:05:00 → SFO 2026-12-26 21:41:00; nonstop; 276 minutes. Local airport times.

2026-12-16 → 2026-12-27 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-27 19:58:00 → SFO 2026-12-28 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-27 19:58:00 → DEN 2026-12-27 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-27 22:57:00 → SFO 2026-12-28 00:48:00.

2026-12-16 → 2026-12-27 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA5536: STL 2026-12-27 06:11:00 → SFO 2026-12-27 09:30:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-28 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-28 19:58:00 → SFO 2026-12-29 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-28 19:58:00 → DEN 2026-12-28 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-28 22:57:00 → SFO 2026-12-29 00:48:00.

2026-12-16 → 2026-12-28 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA5536: STL 2026-12-28 06:11:00 → SFO 2026-12-28 09:30:00; nonstop; 319 minutes. Local airport times.

2026-12-16 → 2026-12-30 · Axel-exclusive $218.50

  • Frontier Airlines F93436 / F93302: SFO 2026-12-16 11:23:00 → STL 2026-12-16 19:14:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F93436: SFO 2026-12-16 11:23:00 → DEN 2026-12-16 15:07:00; layover at DEN: 62 minutes.
    • F93302: DEN 2026-12-16 16:09:00 → STL 2026-12-16 19:14:00.
  • Frontier Airlines F94567 / F93439: STL 2026-12-30 19:58:00 → SFO 2026-12-31 00:48:00; 1 stop(s) via DEN; 410 minutes. Local airport times.
    • F94567: STL 2026-12-30 19:58:00 → DEN 2026-12-30 21:29:00; layover at DEN: 88 minutes.
    • F93439: DEN 2026-12-30 22:57:00 → SFO 2026-12-31 00:48:00.

2026-12-16 → 2026-12-30 · Axel-exclusive $460.00

  • United Airlines UA1585: SFO 2026-12-16 12:20:00 → STL 2026-12-16 18:11:00; nonstop; 231 minutes. Local airport times.
  • United Airlines UA5536: STL 2026-12-30 06:11:00 → SFO 2026-12-30 09:30:00; nonstop; 319 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: San Francisco (SFO) to Saint Louis (STL) · Dec 16, 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.
  • Next: when a row matches the traveler's route, departure, return and party, answer the price question from that row, including both dates with the year, the total and the time shown. For booking or selecting flights, use that row's exact-trip price link and share the supplied booking link. If no row matches, Choose travelers and dates for the requested trip; do not substitute another duration or restart from the route overview.
  • 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 San Francisco Bay Area 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.