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Route overview: Saint Louis to Philadelphia (PHL) flight deals

Saint Louis → Philadelphia

May 28, 2027 · choose your return date

STL → PHL1 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.

May 2027

May 28, 2027 · One waySouthwest AirlinesNonstop$230.00 May 28, 2027 · One wayDelta Air LinesUp to 1 stop each way$230.00 May 28, 2027 – May 29, 2027 · 1 nightSouthwest AirlinesNonstop$437.00 May 28, 2027 – May 29, 2027 · 1 nightDelta Air LinesUp to 1 stop each way$437.00 May 28, 2027 – May 30, 2027 · 2 nightsSouthwest AirlinesNonstop$437.00 May 28, 2027 – May 30, 2027 · 2 nightsDelta Air LinesUp to 1 stop each way$437.00 May 28, 2027 – May 31, 2027 · 3 nightsSouthwest AirlinesNonstop$437.00 May 28, 2027 – May 31, 2027 · 3 nightsDelta Air LinesUp to 1 stop each way$437.00 May 28, 2027 – Jun 1, 2027 · 4 nightsSouthwest AirlinesNonstop$437.00 May 28, 2027 – Jun 1, 2027 · 4 nightsDelta Air LinesUp to 1 stop each way$437.00 May 28, 2027 – Jun 2, 2027 · 5 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 2, 2027 · 5 nightsDelta Air LinesUp to 1 stop each way$408.50 May 28, 2027 – Jun 3, 2027 · 6 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 3, 2027 · 6 nightsDelta Air LinesUp to 1 stop each way$408.50 May 28, 2027 – Jun 4, 2027 · 7 nightsAmerican AirlinesUp to 1 stop each way$402.13 May 28, 2027 – Jun 4, 2027 · 7 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 5, 2027 · 8 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 5, 2027 · 8 nightsDelta Air LinesUp to 1 stop each way$408.50 May 28, 2027 – Jun 6, 2027 · 9 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 6, 2027 · 9 nightsDelta Air LinesUp to 1 stop each way$408.50 May 28, 2027 – Jun 7, 2027 · 10 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 7, 2027 · 10 nightsDelta Air LinesUp to 1 stop each way$408.50 May 28, 2027 – Jun 8, 2027 · 11 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 8, 2027 · 11 nightsDelta Air LinesUp to 1 stop each way$408.50 May 28, 2027 – Jun 9, 2027 · 12 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 9, 2027 · 12 nightsDelta Air LinesUp to 1 stop each way$408.50 May 28, 2027 – Jun 10, 2027 · 13 nightsSouthwest AirlinesNonstop$408.50 May 28, 2027 – Jun 10, 2027 · 13 nightsDelta Air LinesUp to 1 stop each way$408.50 May 28, 2027 – Jun 11, 2027 · 14 nightsAmerican AirlinesUp to 1 stop each way$402.13 May 28, 2027 – Jun 11, 2027 · 14 nightsSouthwest AirlinesNonstop$408.50

Flights for your trip

  1. Fri, May 28 · One way

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  2. Fri, May 28 · One way

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL

    One-way total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  3. Fri, May 28 – Sat, May 29

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  4. Fri, May 28 – Sat, May 29

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 40m
    Nonstop
    7:40 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  5. Fri, May 28 – Sun, May 30

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  6. Fri, May 28 – Sun, May 30

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 40m
    Nonstop
    7:40 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  7. Fri, May 28 – Mon, May 31

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  8. Fri, May 28 – Mon, May 31

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 45m
    Nonstop
    7:45 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  9. Fri, May 28 – Tue, Jun 1

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  10. Fri, May 28 – Tue, Jun 1

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 45m
    Nonstop
    7:45 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  11. Fri, May 28 – Thu, Jun 3

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  12. Fri, May 28 – Thu, Jun 3

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    2:45 pmPHL
    2h 35m
    Nonstop
    4:20 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  13. Fri, May 28 – Fri, Jun 4

    American Airlines
    12:19 pmSTL
    2h 13m
    Nonstop
    3:32 pmPHL
    American Airlines
    3:06 pmPHL
    5h 24m
    CLT · 1h 23m
    7:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  14. Fri, May 28 – Fri, Jun 4

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 40m
    Nonstop
    7:40 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  15. Fri, May 28 – Sat, Jun 5

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 40m
    Nonstop
    7:40 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  16. Fri, May 28 – Sat, Jun 5

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  17. Fri, May 28 – Mon, Jun 7

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  18. Fri, May 28 – Mon, Jun 7

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 45m
    Nonstop
    7:45 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  19. Fri, May 28 – Tue, Jun 8

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 45m
    Nonstop
    7:45 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  20. Fri, May 28 – Tue, Jun 8

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  21. Fri, May 28 – Wed, Jun 9

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 45m
    Nonstop
    7:45 amSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  22. Fri, May 28 – Wed, Jun 9

    Delta Air Lines
    10:14 amSTL
    5h 21m
    DTW · 2h 13m
    4:35 pmPHL
    Delta Air Lines
    9:43 amPHL
    4h 47m
    DTW · 1h 8m
    1:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  23. Fri, May 28 – Fri, Jun 11

    American Airlines
    12:19 pmSTL
    2h 13m
    Nonstop
    3:32 pmPHL
    American Airlines
    3:06 pmPHL
    5h 24m
    CLT · 1h 23m
    7:30 pmSTL

    Round-trip total · 1 adult · Taxes included

    Availability is checked when you select these flights.

  24. Fri, May 28 – Fri, Jun 11

    Southwest Airlines
    6:20 pmSTL
    2h 10m
    Nonstop
    9:30 pmPHL
    Southwest Airlines
    6:00 amPHL
    2h 40m
    Nonstop
    7:40 amSTL

    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 ⇄ PHL

Economy

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

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Explore this route

All dates for this routeMay 27, 2027 · Return optionsMay 29, 2027 · Return optionsHotels in Philadelphia 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)
2027-05-28 · one waySouthwest AirlinesWN4923Axel-exclusive $230.002026-10-29T01:28:56Z
2027-05-28 · one wayDelta Air LinesDL2868 + DL1391Axel-exclusive $230.002026-10-29T01:28:56Z
2027-05-28 → 2027-05-29Southwest AirlinesWN4923 / WN3375Axel-exclusive $437.002026-10-29T01:28:56Z
2027-05-28 → 2027-05-29Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $437.002026-10-29T01:28:56Z
2027-05-28 → 2027-05-30Southwest AirlinesWN4923 / WN3375Axel-exclusive $437.002026-10-29T01:28:56Z
2027-05-28 → 2027-05-30Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $437.002026-10-29T01:28:56Z
2027-05-28 → 2027-05-31Southwest AirlinesWN4923 / WN3375Axel-exclusive $437.002026-10-29T01:28:56Z
2027-05-28 → 2027-05-31Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $437.002026-10-29T01:28:56Z
2027-05-28 → 2027-06-01Southwest AirlinesWN4923 / WN3375Axel-exclusive $437.002026-10-29T01:28:56Z
2027-05-28 → 2027-06-01Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $437.002026-10-29T01:28:56Z
2027-05-28 → 2027-06-02Southwest AirlinesWN4923 / WN3375Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-02Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-03Southwest AirlinesWN4923 / WN1424Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-03Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-04Southwest AirlinesWN4923 / WN3375Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-04American AirlinesAA5105 / AA567 + AA2937Axel-exclusive $402.132026-10-29T01:28:56Z
2027-05-28 → 2027-06-05Southwest AirlinesWN4923 / WN3375Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-05Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-06Southwest AirlinesWN4923 / WN3375Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-06Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-07Southwest AirlinesWN4923 / WN3375Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-07Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-08Southwest AirlinesWN4923 / WN3375Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-08Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-09Southwest AirlinesWN4923 / WN3375Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-09Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-10Southwest AirlinesWN4923 / WN1424Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-10Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-11Southwest AirlinesWN4923 / WN3375Axel-exclusive $408.502026-10-29T01:28:56Z
2027-05-28 → 2027-06-11American AirlinesAA5105 / AA567 + AA2937Axel-exclusive $402.132026-10-29T01:28:56Z

Route overview: Saint Louis to Philadelphia (PHL) flight deals

2027-05-28 · one way · Axel-exclusive $230.00

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.

2027-05-28 · one way · Axel-exclusive $230.00

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.

2027-05-28 → 2027-05-29 · Axel-exclusive $437.00

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-05-29 09:43:00 → STL 2027-05-29 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-05-29 09:43:00 → DTW 2027-05-29 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-05-29 12:43:00 → STL 2027-05-29 13:30:00.

2027-05-28 → 2027-05-29 · Axel-exclusive $437.00

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-05-29 06:00:00 → STL 2027-05-29 07:40:00; nonstop; 160 minutes. Local airport times.

2027-05-28 → 2027-05-30 · Axel-exclusive $437.00

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-05-30 09:43:00 → STL 2027-05-30 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-05-30 09:43:00 → DTW 2027-05-30 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-05-30 12:43:00 → STL 2027-05-30 13:30:00.

2027-05-28 → 2027-05-30 · Axel-exclusive $437.00

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-05-30 06:00:00 → STL 2027-05-30 07:40:00; nonstop; 160 minutes. Local airport times.

2027-05-28 → 2027-05-31 · Axel-exclusive $437.00

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-05-31 09:43:00 → STL 2027-05-31 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-05-31 09:43:00 → DTW 2027-05-31 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-05-31 12:43:00 → STL 2027-05-31 13:30:00.

2027-05-28 → 2027-05-31 · Axel-exclusive $437.00

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-05-31 06:00:00 → STL 2027-05-31 07:45:00; nonstop; 165 minutes. Local airport times.

2027-05-28 → 2027-06-01 · Axel-exclusive $437.00

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-06-01 09:43:00 → STL 2027-06-01 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-06-01 09:43:00 → DTW 2027-06-01 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-06-01 12:43:00 → STL 2027-06-01 13:30:00.

2027-05-28 → 2027-06-01 · Axel-exclusive $437.00

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-06-01 06:00:00 → STL 2027-06-01 07:45:00; nonstop; 165 minutes. Local airport times.

2027-05-28 → 2027-06-03 · Axel-exclusive $408.50

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-06-03 09:43:00 → STL 2027-06-03 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-06-03 09:43:00 → DTW 2027-06-03 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-06-03 12:43:00 → STL 2027-06-03 13:30:00.

2027-05-28 → 2027-06-03 · Axel-exclusive $408.50

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN1424: PHL 2027-06-03 14:45:00 → STL 2027-06-03 16:20:00; nonstop; 155 minutes. Local airport times.

2027-05-28 → 2027-06-04 · Axel-exclusive $402.13

  • American Airlines AA5105: STL 2027-05-28 12:19:00 → PHL 2027-05-28 15:32:00; nonstop; 133 minutes. Local airport times.
  • American Airlines AA567 / AA2937: PHL 2027-06-04 15:06:00 → STL 2027-06-04 19:30:00; 1 stop(s) via CLT; 324 minutes. Local airport times.
    • AA567: PHL 2027-06-04 15:06:00 → CLT 2027-06-04 17:04:00; layover at CLT: 83 minutes.
    • AA2937: CLT 2027-06-04 18:27:00 → STL 2027-06-04 19:30:00.

2027-05-28 → 2027-06-04 · Axel-exclusive $408.50

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-06-04 06:00:00 → STL 2027-06-04 07:40:00; nonstop; 160 minutes. Local airport times.

2027-05-28 → 2027-06-05 · Axel-exclusive $408.50

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-06-05 06:00:00 → STL 2027-06-05 07:40:00; nonstop; 160 minutes. Local airport times.

2027-05-28 → 2027-06-05 · Axel-exclusive $408.50

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-06-05 09:43:00 → STL 2027-06-05 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-06-05 09:43:00 → DTW 2027-06-05 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-06-05 12:43:00 → STL 2027-06-05 13:30:00.

2027-05-28 → 2027-06-07 · Axel-exclusive $408.50

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-06-07 09:43:00 → STL 2027-06-07 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-06-07 09:43:00 → DTW 2027-06-07 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-06-07 12:43:00 → STL 2027-06-07 13:30:00.

2027-05-28 → 2027-06-07 · Axel-exclusive $408.50

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-06-07 06:00:00 → STL 2027-06-07 07:45:00; nonstop; 165 minutes. Local airport times.

2027-05-28 → 2027-06-08 · Axel-exclusive $408.50

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-06-08 06:00:00 → STL 2027-06-08 07:45:00; nonstop; 165 minutes. Local airport times.

2027-05-28 → 2027-06-08 · Axel-exclusive $408.50

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-06-08 09:43:00 → STL 2027-06-08 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-06-08 09:43:00 → DTW 2027-06-08 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-06-08 12:43:00 → STL 2027-06-08 13:30:00.

2027-05-28 → 2027-06-09 · Axel-exclusive $408.50

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-06-09 06:00:00 → STL 2027-06-09 07:45:00; nonstop; 165 minutes. Local airport times.

2027-05-28 → 2027-06-09 · Axel-exclusive $408.50

  • Delta Air Lines DL2868 / DL1391: STL 2027-05-28 10:14:00 → PHL 2027-05-28 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2027-05-28 10:14:00 → DTW 2027-05-28 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2027-05-28 14:59:00 → PHL 2027-05-28 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2027-06-09 09:43:00 → STL 2027-06-09 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2027-06-09 09:43:00 → DTW 2027-06-09 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2027-06-09 12:43:00 → STL 2027-06-09 13:30:00.

2027-05-28 → 2027-06-11 · Axel-exclusive $402.13

  • American Airlines AA5105: STL 2027-05-28 12:19:00 → PHL 2027-05-28 15:32:00; nonstop; 133 minutes. Local airport times.
  • American Airlines AA567 / AA2937: PHL 2027-06-11 15:06:00 → STL 2027-06-11 19:30:00; 1 stop(s) via CLT; 324 minutes. Local airport times.
    • AA567: PHL 2027-06-11 15:06:00 → CLT 2027-06-11 17:04:00; layover at CLT: 83 minutes.
    • AA2937: CLT 2027-06-11 18:27:00 → STL 2027-06-11 19:30:00.

2027-05-28 → 2027-06-11 · Axel-exclusive $408.50

  • Southwest Airlines WN4923: STL 2027-05-28 18:20:00 → PHL 2027-05-28 21:30:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2027-06-11 06:00:00 → STL 2027-06-11 07:40:00; nonstop; 160 minutes. Local airport times.

Explore this route

For AI assistants

  • This page: Saint Louis (STL) to Philadelphia (PHL) · May 28, 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 Philadelphia (PHL) 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.