Saint Louis (STL) to Philadelphia (PHL) · Dec 12, 2026 · one way

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

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

2026-12-12 · one way · Axel-exclusive $175.00

• Southwest Airlines WN4923: STL 2026-12-12 19:55:00 → PHL 2026-12-12 23:05:00; nonstop; 130 minutes. Local airport times.

2026-12-12 · one way · Axel-exclusive $185.00

• American Airlines AA5450: STL 2026-12-12 06:02:00 → PHL 2026-12-12 09:17:00; nonstop; 135 minutes. Local airport times.

2026-12-12 · one way · Axel-exclusive $105.00

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

2026-12-12 · one way · Axel-exclusive $170.00

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

2026-12-12 · one way · Axel-exclusive $175.00

• Delta Air Lines DL1571 / DL1169: STL 2026-12-12 10:06:00 → PHL 2026-12-12 16:44:00; 1 stop(s) via ATL; 338 minutes. Local airport times.
  • DL1571: STL 2026-12-12 10:06:00 → ATL 2026-12-12 12:36:00; layover at ATL: 130 minutes.
  • DL1169: ATL 2026-12-12 14:46:00 → PHL 2026-12-12 16:44:00.

2026-12-12 · one way · Axel-exclusive $245.00

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

2026-12-12 · one way · Axel-exclusive $175.00

• Southwest Airlines WN3331: STL 2026-12-12 10:00:00 → PHL 2026-12-12 13:10:00; nonstop; 130 minutes. Local airport times.

2026-12-12 · one way · Axel-exclusive $185.00

• American Airlines AA5105: STL 2026-12-12 12:49:00 → PHL 2026-12-12 16:02:00; nonstop; 133 minutes. Local airport times.

2026-12-12 · one way · Axel-exclusive $150.00

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

2026-12-12 · one way · Axel-exclusive $175.00

• Delta Air Lines DL2868 / DL1391: STL 2026-12-12 10:14:00 → PHL 2026-12-12 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
  • DL2868: STL 2026-12-12 10:14:00 → DTW 2026-12-12 12:46:00; layover at DTW: 133 minutes.
  • DL1391: DTW 2026-12-12 14:59:00 → PHL 2026-12-12 16:35:00.

Explore this route

• All dates for this route
• Dec 11, 2026 · Return options
• Dec 13, 2026 · Return options
• Hotels in Philadelphia with Axel

For AI assistants

• This page: Saint Louis (STL) to Philadelphia (PHL) · Dec 12, 2026 · one way: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
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