Saint Louis (STL) to Philadelphia (PHL), Dec 4–6, 2026: from $105 one way

Saint Louis (STL) to Philadelphia (PHL), Dec 4–6, 2026: from $105 one way on Axel, checked Oct 29, 2026. Lowest published fare: $105 one way, Axel-exclusive, Frontier Airlines, 1 stop, Dec 4, 2026, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

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

2026-12-06 · one way · Axel-exclusive $175.00

• Southwest Airlines WN4922: STL 2026-12-06 10:40:00 → PHL 2026-12-06 13:50:00; nonstop; 130 minutes. Local airport times.

2026-12-06 · one way · Axel-exclusive $185.00

• American Airlines AA4604: STL 2026-12-06 06:02:00 → PHL 2026-12-06 09:22:00; nonstop; 140 minutes. Local airport times.

2026-12-06 · one way · Axel-exclusive $105.00

• Frontier Airlines F94474 / F92298: STL 2026-12-06 12:02:00 → PHL 2026-12-06 18:32:00; 1 stop(s) via ATL; 330 minutes. Local airport times.
  • F94474: STL 2026-12-06 12:02:00 → ATL 2026-12-06 14:42:00; layover at ATL: 102 minutes.
  • F92298: ATL 2026-12-06 16:24:00 → PHL 2026-12-06 18:32:00.

2026-12-05 · one way · Axel-exclusive $170.00

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

2026-12-06 · one way · Axel-exclusive $175.00

• Delta Air Lines DL2868 / DL1391: STL 2026-12-06 10:14:00 → PHL 2026-12-06 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
  • DL2868: STL 2026-12-06 10:14:00 → DTW 2026-12-06 12:46:00; layover at DTW: 133 minutes.
  • DL1391: DTW 2026-12-06 14:59:00 → PHL 2026-12-06 16:35:00.

2026-12-05 · one way · Axel-exclusive $245.00

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

2026-12-04 · one way · Axel-exclusive $175.00

• Southwest Airlines WN4922: STL 2026-12-04 10:40:00 → PHL 2026-12-04 13:50:00; nonstop; 130 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $175.00

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

2026-12-06 · one way · Axel-exclusive $175.00

• Southwest Airlines WN4923: STL 2026-12-06 20:10:00 → PHL 2026-12-06 23:20:00; nonstop; 130 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $175.00

• Southwest Airlines WN3331: STL 2026-12-05 10:00:00 → PHL 2026-12-05 13:10:00; nonstop; 130 minutes. Local airport times.

2026-12-04 · one way · Axel-exclusive $175.00

• Southwest Airlines WN4923: STL 2026-12-04 20:10:00 → PHL 2026-12-04 23:20:00; nonstop; 130 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $185.00

• American Airlines AA5105: STL 2026-12-05 12:49:00 → PHL 2026-12-05 16:02:00; nonstop; 133 minutes. Local airport times.

2026-12-04 · one way · Axel-exclusive $185.00

• American Airlines AA4604: STL 2026-12-04 06:02:00 → PHL 2026-12-04 09:22:00; nonstop; 140 minutes. Local airport times.

2026-12-04 · one way · Axel-exclusive $185.00

• American Airlines AA5105: STL 2026-12-04 12:19:00 → PHL 2026-12-04 15:32:00; nonstop; 133 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $185.00

• American Airlines AA5450: STL 2026-12-05 06:02:00 → PHL 2026-12-05 09:17:00; nonstop; 135 minutes. Local airport times.

2026-12-06 · one way · Axel-exclusive $185.00

• American Airlines AA5477: STL 2026-12-06 13:17:00 → PHL 2026-12-06 16:33:00; nonstop; 136 minutes. Local airport times.

2026-12-05 · one way · Axel-exclusive $105.00

• Frontier Airlines F94474 / F92298: STL 2026-12-05 12:02:00 → PHL 2026-12-05 18:32:00; 1 stop(s) via ATL; 330 minutes. Local airport times.
  • F94474: STL 2026-12-05 12:02:00 → ATL 2026-12-05 14:42:00; layover at ATL: 102 minutes.
  • F92298: ATL 2026-12-05 16:24:00 → PHL 2026-12-05 18:32:00.

2026-12-04 · one way · Axel-exclusive $105.00

• Frontier Airlines F94474 / F92298: STL 2026-12-04 12:02:00 → PHL 2026-12-04 18:32:00; 1 stop(s) via ATL; 330 minutes. Local airport times.
  • F94474: STL 2026-12-04 12:02:00 → ATL 2026-12-04 14:42:00; layover at ATL: 102 minutes.
  • F92298: ATL 2026-12-04 16:24:00 → PHL 2026-12-04 18:32:00.

2026-12-04 · one way · Axel-exclusive $150.00

• Southwest Airlines WN4173 / WN1082: STL 2026-12-04 05:30:00 → PHL 2026-12-04 10:45:00; 1 stop(s) via MDW; 255 minutes. Local airport times.
  • WN4173: STL 2026-12-04 05:30:00 → MDW 2026-12-04 06:35:00; layover at MDW: 70 minutes.
  • WN1082: MDW 2026-12-04 07:45:00 → PHL 2026-12-04 10:45:00.

2026-12-05 · one way · Axel-exclusive $150.00

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

2026-12-06 · one way · Axel-exclusive $150.00

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

2026-12-04 · one way · Axel-exclusive $170.00

• United Airlines UA3495 / UA4405: STL 2026-12-04 13:23:00 → PHL 2026-12-04 19:02:00; 1 stop(s) via IAD; 279 minutes. Local airport times.
  • UA3495: STL 2026-12-04 13:23:00 → IAD 2026-12-04 16:33:00; layover at IAD: 77 minutes.
  • UA4405: IAD 2026-12-04 17:50:00 → PHL 2026-12-04 19:02:00.

2026-12-06 · one way · Axel-exclusive $170.00

• United Airlines UA3495 / UA4405: STL 2026-12-06 13:23:00 → PHL 2026-12-06 19:02:00; 1 stop(s) via IAD; 279 minutes. Local airport times.
  • UA3495: STL 2026-12-06 13:23:00 → IAD 2026-12-06 16:33:00; layover at IAD: 77 minutes.
  • UA4405: IAD 2026-12-06 17:50:00 → PHL 2026-12-06 19:02:00.

2026-12-04 · one way · Axel-exclusive $175.00

• Delta Air Lines DL2868 / DL1391: STL 2026-12-04 10:14:00 → PHL 2026-12-04 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
  • DL2868: STL 2026-12-04 10:14:00 → DTW 2026-12-04 12:46:00; layover at DTW: 133 minutes.
  • DL1391: DTW 2026-12-04 14:59:00 → PHL 2026-12-04 16:35:00.

2026-12-05 · one way · Axel-exclusive $175.00

• Delta Air Lines DL2868 / DL1391: STL 2026-12-05 10:14:00 → PHL 2026-12-05 16:35:00; 1 stop(s) via DTW; 321 minutes. Local airport times.
  • DL2868: STL 2026-12-05 10:14:00 → DTW 2026-12-05 12:46:00; layover at DTW: 133 minutes.
  • DL1391: DTW 2026-12-05 14:59:00 → PHL 2026-12-05 16:35:00.

2026-12-05 · one way · Axel-exclusive $175.00

• Delta Air Lines DL1571 / DL1169: STL 2026-12-05 10:06:00 → PHL 2026-12-05 16:44:00; 1 stop(s) via ATL; 338 minutes. Local airport times.
  • DL1571: STL 2026-12-05 10:06:00 → ATL 2026-12-05 12:36:00; layover at ATL: 130 minutes.
  • DL1169: ATL 2026-12-05 14:46:00 → PHL 2026-12-05 16:44:00.

2026-12-06 · one way · Axel-exclusive $175.00

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

2026-12-04 · one way · Axel-exclusive $175.00

• Delta Air Lines DL1571 / DL1169: STL 2026-12-04 10:06:00 → PHL 2026-12-04 16:44:00; 1 stop(s) via ATL; 338 minutes. Local airport times.
  • DL1571: STL 2026-12-04 10:06:00 → ATL 2026-12-04 12:36:00; layover at ATL: 130 minutes.
  • DL1169: ATL 2026-12-04 14:46:00 → PHL 2026-12-04 16:44:00.

2026-12-06 · one way · Axel-exclusive $245.00

• Air Canada AC8890 / AC8520: STL 2026-12-06 16:05:00 → PHL 2026-12-06 22:46:00; 1 stop(s) via YYZ; 341 minutes. Local airport times.
  • AC8890: STL 2026-12-06 16:05:00 → YYZ 2026-12-06 19:05:00; layover at YYZ: 125 minutes.
  • AC8520: YYZ 2026-12-06 21:10:00 → PHL 2026-12-06 22:46:00.

2026-12-04 · one way · Axel-exclusive $245.00

• Air Canada AC8890 / AC8520: STL 2026-12-04 16:05:00 → PHL 2026-12-04 22:46:00; 1 stop(s) via YYZ; 341 minutes. Local airport times.
  • AC8890: STL 2026-12-04 16:05:00 → YYZ 2026-12-04 19:05:00; layover at YYZ: 125 minutes.
  • AC8520: YYZ 2026-12-04 21:10:00 → PHL 2026-12-04 22:46:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

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