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Saint Louis → Philadelphia

Dec 18, 2026 · return Dec 19, 2026

STL → PHL1 adulteconomyRound trip

10 flight options · 6 airlines

Nonstop flights

Fri, Dec 18 – Sat, Dec 19

Southwest Airlines
10:40 amSTL
2h 10m
Nonstop
1:50 pmPHL
Southwest Airlines
5:25 amPHL
2h 30m
Nonstop
6:55 amSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 18 – Sat, Dec 19

American Airlines
12:19 pmSTL
2h 13m
Nonstop
3:32 pmPHL
American Airlines
8:55 pmPHL
2h 47m
Nonstop
10:42 pmSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 18 – Sat, Dec 19

Southwest Airlines
8:10 pmSTL
2h 10m
Nonstop
11:20 pmPHL
Southwest Airlines
5:25 amPHL
2h 30m
Nonstop
6:55 amSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 18 – Sat, Dec 19

American Airlines
6:02 amSTL
2h 20m
Nonstop
9:22 amPHL
American Airlines
8:55 pmPHL
2h 47m
Nonstop
10:42 pmSTL

Round-trip total · 1 adult · Taxes included

One-stop flights

Fri, Dec 18 – Sat, Dec 19

Frontier Airlines
12:02 pmSTL
5h 30m
ATL · 1h 42m
6:32 pmPHL
Frontier Airlines
12:49 pmPHL
5h 53m
ATL · 1h 30m
5:42 pmSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 18 – Sat, Dec 19

United Airlines
1:23 pmSTL
4h 39m
IAD · 1h 17m
7:02 pmPHL
United Airlines
3:05 pmPHL
5h 30m
IAD · 1h 42m
7:35 pmSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 18 – Sat, Dec 19

Delta Air Lines
10:06 amSTL
5h 38m
ATL · 2h 10m
4:44 pmPHL
Delta Air Lines
9:43 amPHL
4h 47m
DTW · 1h 8m
1:30 pmSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 18 – Sat, Dec 19

Air Canada
4:05 pmSTL
5h 41m
YYZ · 2h 5m
10:46 pmPHL
American Airlines
8:55 pmPHL
2h 47m
Nonstop
10:42 pmSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 18 – Sat, Dec 19

Southwest Airlines
5:30 amSTL
4h 15m
MDW · 1h 10m
10:45 amPHL
Southwest Airlines
5:25 amPHL
2h 30m
Nonstop
6:55 amSTL

Round-trip total · 1 adult · Taxes included

Fri, Dec 18 – Sat, Dec 19

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

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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More dates

All dates for this routeOct 30, 2026 → Nov 2, 2026Oct 31, 2026 → Nov 7, 2026Nov 13, 2026 → Nov 16, 2026Nov 14, 2026 → Nov 21, 2026Nov 24, 2026 → Nov 29, 2026Nov 27, 2026 → Nov 30, 2026Nov 28, 2026 → Dec 5, 2026Dec 11, 2026 → Dec 14, 2026Dec 12, 2026 → Dec 19, 2026Dec 22, 2026 → Dec 27, 2026Dec 25, 2026 → Dec 28, 2026Dec 26, 2026 → Jan 2, 2027Dec 30, 2026 → Jan 2, 2027Jan 8, 2027 → Jan 11, 2027Jan 9, 2027 → Jan 16, 2027Jan 15, 2027 → Jan 18, 2027Jan 22, 2027 → Jan 25, 2027Jan 23, 2027 → Jan 30, 2027Feb 5, 2027 → Feb 8, 2027Feb 6, 2027 → Feb 13, 2027Feb 12, 2027 → Feb 15, 2027Mar 5, 2027 → Mar 8, 2027Mar 6, 2027 → Mar 13, 2027Mar 25, 2027 → Mar 29, 2027Apr 2, 2027 → Apr 5, 2027Apr 3, 2027 → Apr 10, 2027Apr 30, 2027 → May 3, 2027May 1, 2027 → May 8, 2027May 28, 2027 → May 31, 2027May 29, 2027 → Jun 5, 2027Jun 25, 2027 → Jun 28, 2027Jun 26, 2027 → Jul 3, 2027Jul 2, 2027 → Jul 6, 2027Jul 23, 2027 → Jul 26, 2027Jul 24, 2027 → Jul 31, 2027Aug 20, 2027 → Aug 23, 2027Aug 21, 2027 → Aug 28, 2027Sep 3, 2027 → Sep 6, 2027Sep 17, 2027 → Sep 20, 2027Oct 30, 2026 · One way
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.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-18 → 2026-12-19Southwest AirlinesWN4922 / WN3375$371.252026-10-29T01:28:56Z
2026-12-18 → 2026-12-19American AirlinesAA5105 / AA5536$393.752026-10-29T01:28:56Z
2026-12-18 → 2026-12-19Frontier AirlinesF94474 + F92298 / F91147 + F94473$219.382026-10-29T01:28:56Z
2026-12-18 → 2026-12-19United AirlinesUA3495 + UA4405 / UA4575 + UA4527$365.632026-10-29T01:28:56Z
2026-12-18 → 2026-12-19Delta Air LinesDL1571 + DL1169 / DL2968 + DL1371$371.252026-10-29T01:28:56Z
2026-12-18 → 2026-12-19Air Canada / American AirlinesAC8890 + AC8520 / AA5536$446.252026-10-29T01:28:56Z
2026-12-18 → 2026-12-19Southwest AirlinesWN4923 / WN3375$371.252026-10-29T01:28:56Z
2026-12-18 → 2026-12-19American AirlinesAA4604 / AA5536$393.752026-10-29T01:28:56Z
2026-12-18 → 2026-12-19Southwest AirlinesWN4173 + WN1082 / WN3375$348.752026-10-29T01:28:56Z
2026-12-18 → 2026-12-19Delta Air LinesDL2868 + DL1391 / DL2968 + DL1371$371.252026-10-29T01:28:56Z

2026-12-18 → 2026-12-19 · $371.25

  • Southwest Airlines WN4922: STL 2026-12-18 10:40:00 → PHL 2026-12-18 13:50:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2026-12-19 05:25:00 → STL 2026-12-19 06:55:00; nonstop; 150 minutes. Local airport times.

2026-12-18 → 2026-12-19 · $393.75

  • American Airlines AA5105: STL 2026-12-18 12:19:00 → PHL 2026-12-18 15:32:00; nonstop; 133 minutes. Local airport times.
  • American Airlines AA5536: PHL 2026-12-19 20:55:00 → STL 2026-12-19 22:42:00; nonstop; 167 minutes. Local airport times.

2026-12-18 → 2026-12-19 · $219.38

  • Frontier Airlines F94474 / F92298: STL 2026-12-18 12:02:00 → PHL 2026-12-18 18:32:00; 1 stop(s) via ATL; 330 minutes. Local airport times.
    • F94474: STL 2026-12-18 12:02:00 → ATL 2026-12-18 14:42:00; layover at ATL: 102 minutes.
    • F92298: ATL 2026-12-18 16:24:00 → PHL 2026-12-18 18:32:00.
  • Frontier Airlines F91147 / F94473: PHL 2026-12-19 12:49:00 → STL 2026-12-19 17:42:00; 1 stop(s) via ATL; 353 minutes. Local airport times.
    • F91147: PHL 2026-12-19 12:49:00 → ATL 2026-12-19 15:19:00; layover at ATL: 90 minutes.
    • F94473: ATL 2026-12-19 16:49:00 → STL 2026-12-19 17:42:00.

2026-12-18 → 2026-12-19 · $365.63

  • United Airlines UA3495 / UA4405: STL 2026-12-18 13:23:00 → PHL 2026-12-18 19:02:00; 1 stop(s) via IAD; 279 minutes. Local airport times.
    • UA3495: STL 2026-12-18 13:23:00 → IAD 2026-12-18 16:33:00; layover at IAD: 77 minutes.
    • UA4405: IAD 2026-12-18 17:50:00 → PHL 2026-12-18 19:02:00.
  • United Airlines UA4575 / UA4527: PHL 2026-12-19 15:05:00 → STL 2026-12-19 19:35:00; 1 stop(s) via IAD; 330 minutes. Local airport times.
    • UA4575: PHL 2026-12-19 15:05:00 → IAD 2026-12-19 16:18:00; layover at IAD: 102 minutes.
    • UA4527: IAD 2026-12-19 18:00:00 → STL 2026-12-19 19:35:00.

2026-12-18 → 2026-12-19 · $371.25

  • Delta Air Lines DL1571 / DL1169: STL 2026-12-18 10:06:00 → PHL 2026-12-18 16:44:00; 1 stop(s) via ATL; 338 minutes. Local airport times.
    • DL1571: STL 2026-12-18 10:06:00 → ATL 2026-12-18 12:36:00; layover at ATL: 130 minutes.
    • DL1169: ATL 2026-12-18 14:46:00 → PHL 2026-12-18 16:44:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2026-12-19 09:43:00 → STL 2026-12-19 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2026-12-19 09:43:00 → DTW 2026-12-19 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2026-12-19 12:43:00 → STL 2026-12-19 13:30:00.

2026-12-18 → 2026-12-19 · $446.25

  • Air Canada AC8890 / AC8520: STL 2026-12-18 16:05:00 → PHL 2026-12-18 22:46:00; 1 stop(s) via YYZ; 341 minutes. Local airport times.
    • AC8890: STL 2026-12-18 16:05:00 → YYZ 2026-12-18 19:05:00; layover at YYZ: 125 minutes.
    • AC8520: YYZ 2026-12-18 21:10:00 → PHL 2026-12-18 22:46:00.
  • American Airlines AA5536: PHL 2026-12-19 20:55:00 → STL 2026-12-19 22:42:00; nonstop; 167 minutes. Local airport times.

2026-12-18 → 2026-12-19 · $371.25

  • Southwest Airlines WN4923: STL 2026-12-18 20:10:00 → PHL 2026-12-18 23:20:00; nonstop; 130 minutes. Local airport times.
  • Southwest Airlines WN3375: PHL 2026-12-19 05:25:00 → STL 2026-12-19 06:55:00; nonstop; 150 minutes. Local airport times.

2026-12-18 → 2026-12-19 · $393.75

  • American Airlines AA4604: STL 2026-12-18 06:02:00 → PHL 2026-12-18 09:22:00; nonstop; 140 minutes. Local airport times.
  • American Airlines AA5536: PHL 2026-12-19 20:55:00 → STL 2026-12-19 22:42:00; nonstop; 167 minutes. Local airport times.

2026-12-18 → 2026-12-19 · $348.75

  • Southwest Airlines WN4173 / WN1082: STL 2026-12-18 05:30:00 → PHL 2026-12-18 10:45:00; 1 stop(s) via MDW; 255 minutes. Local airport times.
    • WN4173: STL 2026-12-18 05:30:00 → MDW 2026-12-18 06:35:00; layover at MDW: 70 minutes.
    • WN1082: MDW 2026-12-18 07:45:00 → PHL 2026-12-18 10:45:00.
  • Southwest Airlines WN3375: PHL 2026-12-19 05:25:00 → STL 2026-12-19 06:55:00; nonstop; 150 minutes. Local airport times.

2026-12-18 → 2026-12-19 · $371.25

  • Delta Air Lines DL2868 / DL1391: STL 2026-12-18 10:14:00 → PHL 2026-12-18 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
    • DL2868: STL 2026-12-18 10:14:00 → DTW 2026-12-18 12:46:00; layover at DTW: 133 minutes.
    • DL1391: DTW 2026-12-18 14:59:00 → PHL 2026-12-18 16:35:00.
  • Delta Air Lines DL2968 / DL1371: PHL 2026-12-19 09:43:00 → STL 2026-12-19 13:30:00; 1 stop(s) via DTW; 287 minutes. Local airport times.
    • DL2968: PHL 2026-12-19 09:43:00 → DTW 2026-12-19 11:35:00; layover at DTW: 68 minutes.
    • DL1371: DTW 2026-12-19 12:43:00 → STL 2026-12-19 13:30:00.

More dates for this route