Travel with Axel,
get the best price.

Route overview: Saint Louis to Phoenix (PHX) flight deals

Saint Louis → Phoenix

Aug 21, 2027 · choose your return date

STL → PHX1 adulteconomyOne way and round trips

30 flight options · 3 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.

August 2027

Aug 21, 2027 · One wayFrontier AirlinesUp to 1 stop each way$85.00 Aug 21, 2027 · One waySouthwest AirlinesNonstop$150.00 Aug 21, 2027 – Aug 22, 2027 · 1 nightFrontier Airlines / Southwest AirlinesUp to 1 stop each way$220.00 Aug 21, 2027 – Aug 22, 2027 · 1 nightSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 23, 2027 · 2 nightsFrontier Airlines / American AirlinesUp to 1 stop each way$230.00 Aug 21, 2027 – Aug 23, 2027 · 2 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 24, 2027 · 3 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$220.00 Aug 21, 2027 – Aug 24, 2027 · 3 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 25, 2027 · 4 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$220.00 Aug 21, 2027 – Aug 25, 2027 · 4 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 26, 2027 · 5 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$220.00 Aug 21, 2027 – Aug 26, 2027 · 5 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 27, 2027 · 6 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$220.00 Aug 21, 2027 – Aug 27, 2027 · 6 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 28, 2027 · 7 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$220.00 Aug 21, 2027 – Aug 28, 2027 · 7 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 29, 2027 · 8 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$220.00 Aug 21, 2027 – Aug 29, 2027 · 8 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 30, 2027 · 9 nightsFrontier Airlines / American AirlinesUp to 1 stop each way$230.00 Aug 21, 2027 – Aug 30, 2027 · 9 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Aug 31, 2027 · 10 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$220.00 Aug 21, 2027 – Aug 31, 2027 · 10 nightsSouthwest AirlinesNonstop$280.00 Aug 21, 2027 – Sep 1, 2027 · 11 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$213.00 Aug 21, 2027 – Sep 1, 2027 · 11 nightsSouthwest AirlinesNonstop$273.00 Aug 21, 2027 – Sep 2, 2027 · 12 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$213.00 Aug 21, 2027 – Sep 2, 2027 · 12 nightsSouthwest AirlinesNonstop$273.00 Aug 21, 2027 – Sep 3, 2027 · 13 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$232.60 Aug 21, 2027 – Sep 3, 2027 · 13 nightsSouthwest AirlinesNonstop$292.60 Aug 21, 2027 – Sep 4, 2027 · 14 nightsFrontier Airlines / Southwest AirlinesUp to 1 stop each way$232.60 Aug 21, 2027 – Sep 4, 2027 · 14 nightsSouthwest AirlinesNonstop$292.60

Flights for your trip

  1. Sat, Aug 21 · One way

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX

    One-way total · 1 adult · Taxes included

  2. Sat, Aug 21 · One way

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX

    One-way total · 1 adult · Taxes included

  3. Sat, Aug 21 – Sun, Aug 22

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 45m
    Nonstop
    10:30 amSTL

    Round-trip total · 1 adult · Taxes included

  4. Sat, Aug 21 – Sun, Aug 22

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 45m
    Nonstop
    10:30 amSTL

    Round-trip total · 1 adult · Taxes included

  5. Sat, Aug 21 – Mon, Aug 23

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    American Airlines
    7:56 pmPHX
    2h 56m
    Nonstop
    12:52 am+1STL

    Round-trip total · 1 adult · Taxes included

  6. Sat, Aug 21 – Mon, Aug 23

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 45m
    Nonstop
    10:30 amSTL

    Round-trip total · 1 adult · Taxes included

  7. Sat, Aug 21 – Tue, Aug 24

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  8. Sat, Aug 21 – Tue, Aug 24

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  9. Sat, Aug 21 – Wed, Aug 25

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  10. Sat, Aug 21 – Wed, Aug 25

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  11. Sat, Aug 21 – Fri, Aug 27

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 45m
    Nonstop
    10:30 amSTL

    Round-trip total · 1 adult · Taxes included

  12. Sat, Aug 21 – Fri, Aug 27

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 45m
    Nonstop
    10:30 amSTL

    Round-trip total · 1 adult · Taxes included

  13. Sat, Aug 21 – Sat, Aug 28

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:10 amPHX
    2h 50m
    Nonstop
    10:00 amSTL

    Round-trip total · 1 adult · Taxes included

  14. Sat, Aug 21 – Sat, Aug 28

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:10 amPHX
    2h 50m
    Nonstop
    10:00 amSTL

    Round-trip total · 1 adult · Taxes included

  15. Sat, Aug 21 – Sun, Aug 29

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 45m
    Nonstop
    10:30 amSTL

    Round-trip total · 1 adult · Taxes included

  16. Sat, Aug 21 – Sun, Aug 29

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 45m
    Nonstop
    10:30 amSTL

    Round-trip total · 1 adult · Taxes included

  17. Sat, Aug 21 – Tue, Aug 31

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  18. Sat, Aug 21 – Tue, Aug 31

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  19. Sat, Aug 21 – Wed, Sep 1

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  20. Sat, Aug 21 – Wed, Sep 1

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  21. Sat, Aug 21 – Thu, Sep 2

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  22. Sat, Aug 21 – Thu, Sep 2

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:45 amPHX
    2h 50m
    Nonstop
    10:35 amSTL

    Round-trip total · 1 adult · Taxes included

  23. Sat, Aug 21 – Sat, Sep 4

    Frontier Airlines
    7:58 pmSTL
    5h 51m
    DEN · 1h 7m
    11:49 pmPHX
    Southwest Airlines
    5:10 amPHX
    2h 50m
    Nonstop
    10:00 amSTL

    Round-trip total · 1 adult · Taxes included

  24. Sat, Aug 21 – Sat, Sep 4

    Southwest Airlines
    6:40 pmSTL
    3h 20m
    Nonstop
    8:00 pmPHX
    Southwest Airlines
    5:10 amPHX
    2h 50m
    Nonstop
    10:00 amSTL

    Round-trip total · 1 adult · Taxes included

Swipe to see 23 more recent deals.

1 of 24

Make this trip yours

STL ⇄ PHX

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Southwest Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeAug 20, 2027 · Return optionsAug 22, 2027 · Return optionsHotels in Phoenix 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)
2027-08-21 · one waySouthwest AirlinesWN2467Axel-exclusive $150.002026-10-29T01:28:56Z
2027-08-21 · one wayFrontier AirlinesF94567 + F94753Axel-exclusive $85.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-22Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-22Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $220.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-23Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-23Frontier Airlines / American AirlinesF94567 + F94753 / AA2043Axel-exclusive $230.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-24Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-24Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $220.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-25Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-25Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $220.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-26Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-26Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $220.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-27Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-27Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $220.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-28Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-28Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $220.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-29Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-29Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $220.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-30Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-30Frontier Airlines / American AirlinesF94567 + F94753 / AA2043Axel-exclusive $230.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-31Southwest AirlinesWN2467 / WN3524Axel-exclusive $280.002026-10-29T01:28:56Z
2027-08-21 → 2027-08-31Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $220.002026-10-29T01:28:56Z
2027-08-21 → 2027-09-01Southwest AirlinesWN2467 / WN3524Axel-exclusive $273.002026-10-29T01:28:56Z
2027-08-21 → 2027-09-01Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $213.002026-10-29T01:28:56Z
2027-08-21 → 2027-09-02Southwest AirlinesWN2467 / WN3524Axel-exclusive $273.002026-10-29T01:28:56Z
2027-08-21 → 2027-09-02Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $213.002026-10-29T01:28:56Z
2027-08-21 → 2027-09-03Southwest AirlinesWN2467 / WN3524Axel-exclusive $292.602026-10-29T01:28:56Z
2027-08-21 → 2027-09-03Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $232.602026-10-29T01:28:56Z
2027-08-21 → 2027-09-04Southwest AirlinesWN2467 / WN3524Axel-exclusive $292.602026-10-29T01:28:56Z
2027-08-21 → 2027-09-04Frontier Airlines / Southwest AirlinesF94567 + F94753 / WN3524Axel-exclusive $232.602026-10-29T01:28:56Z

Route overview: Saint Louis to Phoenix (PHX) flight deals

2027-08-21 · one way · Axel-exclusive $85.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.

2027-08-21 · one way · Axel-exclusive $150.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.

2027-08-21 → 2027-08-22 · Axel-exclusive $220.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-08-22 05:45:00 → STL 2027-08-22 10:30:00; nonstop; 165 minutes. Local airport times.

2027-08-21 → 2027-08-22 · Axel-exclusive $280.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-08-22 05:45:00 → STL 2027-08-22 10:30:00; nonstop; 165 minutes. Local airport times.

2027-08-21 → 2027-08-23 · Axel-exclusive $230.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • American Airlines AA2043: PHX 2027-08-23 19:56:00 → STL 2027-08-24 00:52:00; nonstop; 176 minutes. Local airport times.

2027-08-21 → 2027-08-23 · Axel-exclusive $280.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-08-23 05:45:00 → STL 2027-08-23 10:30:00; nonstop; 165 minutes. Local airport times.

2027-08-21 → 2027-08-24 · Axel-exclusive $220.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-08-24 05:45:00 → STL 2027-08-24 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-08-24 · Axel-exclusive $280.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-08-24 05:45:00 → STL 2027-08-24 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-08-25 · Axel-exclusive $220.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-08-25 05:45:00 → STL 2027-08-25 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-08-25 · Axel-exclusive $280.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-08-25 05:45:00 → STL 2027-08-25 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-08-27 · Axel-exclusive $220.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-08-27 05:45:00 → STL 2027-08-27 10:30:00; nonstop; 165 minutes. Local airport times.

2027-08-21 → 2027-08-27 · Axel-exclusive $280.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-08-27 05:45:00 → STL 2027-08-27 10:30:00; nonstop; 165 minutes. Local airport times.

2027-08-21 → 2027-08-28 · Axel-exclusive $220.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-08-28 05:10:00 → STL 2027-08-28 10:00:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-08-28 · Axel-exclusive $280.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-08-28 05:10:00 → STL 2027-08-28 10:00:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-08-29 · Axel-exclusive $220.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-08-29 05:45:00 → STL 2027-08-29 10:30:00; nonstop; 165 minutes. Local airport times.

2027-08-21 → 2027-08-29 · Axel-exclusive $280.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-08-29 05:45:00 → STL 2027-08-29 10:30:00; nonstop; 165 minutes. Local airport times.

2027-08-21 → 2027-08-31 · Axel-exclusive $220.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-08-31 05:45:00 → STL 2027-08-31 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-08-31 · Axel-exclusive $280.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-08-31 05:45:00 → STL 2027-08-31 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-09-01 · Axel-exclusive $213.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-09-01 05:45:00 → STL 2027-09-01 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-09-01 · Axel-exclusive $273.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-09-01 05:45:00 → STL 2027-09-01 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-09-02 · Axel-exclusive $213.00

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-09-02 05:45:00 → STL 2027-09-02 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-09-02 · Axel-exclusive $273.00

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-09-02 05:45:00 → STL 2027-09-02 10:35:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-09-04 · Axel-exclusive $232.60

  • Frontier Airlines F94567 / F94753: STL 2027-08-21 19:58:00 → PHX 2027-08-21 23:49:00; 1 stop(s) via DEN; 351 minutes. Local airport times.
    • F94567: STL 2027-08-21 19:58:00 → DEN 2027-08-21 21:29:00; layover at DEN: 67 minutes.
    • F94753: DEN 2027-08-21 22:36:00 → PHX 2027-08-21 23:49:00.
  • Southwest Airlines WN3524: PHX 2027-09-04 05:10:00 → STL 2027-09-04 10:00:00; nonstop; 170 minutes. Local airport times.

2027-08-21 → 2027-09-04 · Axel-exclusive $292.60

  • Southwest Airlines WN2467: STL 2027-08-21 18:40:00 → PHX 2027-08-21 20:00:00; nonstop; 200 minutes. Local airport times.
  • Southwest Airlines WN3524: PHX 2027-09-04 05:10:00 → STL 2027-09-04 10:00:00; nonstop; 170 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Saint Louis (STL) to Phoenix (PHX) · Aug 21, 2027 · 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 Saint Louis to Phoenix (PHX) 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. Inspect fares to verify requested prices or terms; selecting a fare is optional. Use that fare’s booking link to preserve its Membership price basis. State anything unverified. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and explain what remains unresolved. Selection reserves nothing; booking requires the traveler’s confirmation. 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.