Seattle (SEA) to Philadelphia (PHL), Dec 18–20, 2026: from $241 one way

Seattle (SEA) to Philadelphia (PHL), Dec 18–20, 2026: from $241 one way on Axel, checked Oct 29, 2026. Lowest published fare: $241 one way, Axel-exclusive, Alaska Airlines, 1 stop, Dec 18, 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: Seattle to Philadelphia (PHL) flight deals

2026-12-19 · one way · Axel-exclusive $266.50

• Alaska Airlines AS442: SEA 2026-12-19 09:05:00 → PHL 2026-12-19 17:08:00; nonstop; 303 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $279.50

• American Airlines AA2203: SEA 2026-12-20 12:34:00 → PHL 2026-12-20 20:35:00; nonstop; 301 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $292.50

• Delta Air Lines DL1114: SEA 2026-12-20 21:38:00 → PHL 2026-12-21 05:43:00; nonstop; 305 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $247.00

• Southwest Airlines WN1550 / WN1623: SEA 2026-12-18 06:30:00 → PHL 2026-12-18 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
  • WN1550: SEA 2026-12-18 06:30:00 → MDW 2026-12-18 12:25:00; layover at MDW: 70 minutes.
  • WN1623: MDW 2026-12-18 13:35:00 → PHL 2026-12-18 16:30:00.

2026-12-19 · one way · Axel-exclusive $253.50

• United Airlines UA1686 / UA225: SEA 2026-12-19 05:05:00 → PHL 2026-12-19 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
  • UA1686: SEA 2026-12-19 05:05:00 → DEN 2026-12-19 08:42:00; layover at DEN: 93 minutes.
  • UA225: DEN 2026-12-19 10:15:00 → PHL 2026-12-19 15:51:00.

2026-12-18 · one way · Axel-exclusive $266.50

• Alaska Airlines AS371: SEA 2026-12-18 21:33:00 → PHL 2026-12-19 05:42:00; nonstop; 309 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $266.50

• Alaska Airlines AS442: SEA 2026-12-20 09:05:00 → PHL 2026-12-20 17:08:00; nonstop; 303 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $266.50

• Alaska Airlines AS442: SEA 2026-12-18 09:05:00 → PHL 2026-12-18 17:08:00; nonstop; 303 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $266.50

• Alaska Airlines AS371: SEA 2026-12-20 21:33:00 → PHL 2026-12-21 05:42:00; nonstop; 309 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $266.50

• Alaska Airlines AS371: SEA 2026-12-19 21:33:00 → PHL 2026-12-20 05:42:00; nonstop; 309 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $279.50

• American Airlines AA771: SEA 2026-12-18 09:15:00 → PHL 2026-12-18 17:23:00; nonstop; 308 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $279.50

• American Airlines AA467: SEA 2026-12-18 12:42:00 → PHL 2026-12-18 20:44:00; nonstop; 302 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $279.50

• American Airlines AA467: SEA 2026-12-19 12:42:00 → PHL 2026-12-19 20:44:00; nonstop; 302 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $279.50

• American Airlines AA771: SEA 2026-12-19 09:15:00 → PHL 2026-12-19 17:23:00; nonstop; 308 minutes. Local airport times.

2026-12-20 · one way · Axel-exclusive $279.50

• American Airlines AA771: SEA 2026-12-20 09:15:00 → PHL 2026-12-20 17:23:00; nonstop; 308 minutes. Local airport times.

2026-12-18 · one way · Axel-exclusive $292.50

• Delta Air Lines DL1114: SEA 2026-12-18 21:38:00 → PHL 2026-12-19 05:43:00; nonstop; 305 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $292.50

• Delta Air Lines DL1114: SEA 2026-12-19 21:38:00 → PHL 2026-12-20 05:43:00; nonstop; 305 minutes. Local airport times.

2026-12-19 · one way · Axel-exclusive $240.50

• Alaska Airlines AS328 / AA970: SEA 2026-12-19 23:40:00 → PHL 2026-12-20 09:50:00; 1 stop(s) via ORD; 430 minutes. Local airport times.
  • AS328: SEA 2026-12-19 23:40:00 → ORD 2026-12-20 05:37:00; layover at ORD: 68 minutes.
  • AA970: ORD 2026-12-20 06:45:00 → PHL 2026-12-20 09:50:00.

2026-12-20 · one way · Axel-exclusive $240.50

• Alaska Airlines AS328 / AA970: SEA 2026-12-20 23:40:00 → PHL 2026-12-21 09:50:00; 1 stop(s) via ORD; 430 minutes. Local airport times.
  • AS328: SEA 2026-12-20 23:40:00 → ORD 2026-12-21 05:37:00; layover at ORD: 68 minutes.
  • AA970: ORD 2026-12-21 06:45:00 → PHL 2026-12-21 09:50:00.

2026-12-18 · one way · Axel-exclusive $240.50

• Alaska Airlines AS328 / AA970: SEA 2026-12-18 23:40:00 → PHL 2026-12-19 09:50:00; 1 stop(s) via ORD; 430 minutes. Local airport times.
  • AS328: SEA 2026-12-18 23:40:00 → ORD 2026-12-19 05:37:00; layover at ORD: 68 minutes.
  • AA970: ORD 2026-12-19 06:45:00 → PHL 2026-12-19 09:50:00.

2026-12-19 · one way · Axel-exclusive $247.00

• Southwest Airlines WN1550 / WN1623: SEA 2026-12-19 06:30:00 → PHL 2026-12-19 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
  • WN1550: SEA 2026-12-19 06:30:00 → MDW 2026-12-19 12:25:00; layover at MDW: 70 minutes.
  • WN1623: MDW 2026-12-19 13:35:00 → PHL 2026-12-19 16:30:00.

2026-12-20 · one way · Axel-exclusive $247.00

• Southwest Airlines WN1550 / WN1623: SEA 2026-12-20 06:30:00 → PHL 2026-12-20 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
  • WN1550: SEA 2026-12-20 06:30:00 → MDW 2026-12-20 12:25:00; layover at MDW: 70 minutes.
  • WN1623: MDW 2026-12-20 13:35:00 → PHL 2026-12-20 16:30:00.

2026-12-20 · one way · Axel-exclusive $253.50

• United Airlines UA1686 / UA225: SEA 2026-12-20 05:05:00 → PHL 2026-12-20 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
  • UA1686: SEA 2026-12-20 05:05:00 → DEN 2026-12-20 08:42:00; layover at DEN: 93 minutes.
  • UA225: DEN 2026-12-20 10:15:00 → PHL 2026-12-20 15:51:00.

2026-12-18 · one way · Axel-exclusive $253.50

• United Airlines UA1686 / UA225: SEA 2026-12-18 05:05:00 → PHL 2026-12-18 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
  • UA1686: SEA 2026-12-18 05:05:00 → DEN 2026-12-18 08:42:00; layover at DEN: 93 minutes.
  • UA225: DEN 2026-12-18 10:15:00 → PHL 2026-12-18 15:51:00.

2026-12-18 · one way · Axel-exclusive $260.00

• Delta Air Lines DL942 / DL2703: SEA 2026-12-18 13:50:00 → PHL 2026-12-18 23:54:00; 1 stop(s) via MSP; 424 minutes. Local airport times.
  • DL942: SEA 2026-12-18 13:50:00 → MSP 2026-12-18 19:11:00; layover at MSP: 69 minutes.
  • DL2703: MSP 2026-12-18 20:20:00 → PHL 2026-12-18 23:54:00.

2026-12-20 · one way · Axel-exclusive $260.00

• Delta Air Lines DL942 / DL2703: SEA 2026-12-20 13:50:00 → PHL 2026-12-20 23:54:00; 1 stop(s) via MSP; 424 minutes. Local airport times.
  • DL942: SEA 2026-12-20 13:50:00 → MSP 2026-12-20 19:11:00; layover at MSP: 69 minutes.
  • DL2703: MSP 2026-12-20 20:20:00 → PHL 2026-12-20 23:54:00.

2026-12-19 · one way · Axel-exclusive $260.00

• Delta Air Lines DL567 / DL1100: SEA 2026-12-19 22:40:00 → PHL 2026-12-20 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
  • DL567: SEA 2026-12-19 22:40:00 → ATL 2026-12-20 06:12:00; layover at ATL: 78 minutes.
  • DL1100: ATL 2026-12-20 07:30:00 → PHL 2026-12-20 09:31:00.

2026-12-18 · one way · Axel-exclusive $260.00

• Delta Air Lines DL812 / DL1391: SEA 2026-12-18 06:00:00 → PHL 2026-12-18 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
  • DL812: SEA 2026-12-18 06:00:00 → DTW 2026-12-18 13:12:00; layover at DTW: 107 minutes.
  • DL1391: DTW 2026-12-18 14:59:00 → PHL 2026-12-18 16:35:00.

2026-12-20 · one way · Axel-exclusive $260.00

• Delta Air Lines DL812 / DL1391: SEA 2026-12-20 06:00:00 → PHL 2026-12-20 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
  • DL812: SEA 2026-12-20 06:00:00 → DTW 2026-12-20 13:12:00; layover at DTW: 107 minutes.
  • DL1391: DTW 2026-12-20 14:59:00 → PHL 2026-12-20 16:35:00.

2026-12-19 · one way · Axel-exclusive $260.00

• Delta Air Lines DL942 / DL2703: SEA 2026-12-19 13:50:00 → PHL 2026-12-19 23:54:00; 1 stop(s) via MSP; 424 minutes. Local airport times.
  • DL942: SEA 2026-12-19 13:50:00 → MSP 2026-12-19 19:11:00; layover at MSP: 69 minutes.
  • DL2703: MSP 2026-12-19 20:20:00 → PHL 2026-12-19 23:54:00.

2026-12-18 · one way · Axel-exclusive $260.00

• Delta Air Lines DL567 / DL1100: SEA 2026-12-18 22:40:00 → PHL 2026-12-19 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
  • DL567: SEA 2026-12-18 22:40:00 → ATL 2026-12-19 06:12:00; layover at ATL: 78 minutes.
  • DL1100: ATL 2026-12-19 07:30:00 → PHL 2026-12-19 09:31:00.

2026-12-19 · one way · Axel-exclusive $260.00

• Delta Air Lines DL812 / DL1391: SEA 2026-12-19 06:00:00 → PHL 2026-12-19 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
  • DL812: SEA 2026-12-19 06:00:00 → DTW 2026-12-19 13:12:00; layover at DTW: 107 minutes.
  • DL1391: DTW 2026-12-19 14:59:00 → PHL 2026-12-19 16:35:00.

2026-12-20 · one way · Axel-exclusive $260.00

• Delta Air Lines DL567 / DL1100: SEA 2026-12-20 22:40:00 → PHL 2026-12-21 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
  • DL567: SEA 2026-12-20 22:40:00 → ATL 2026-12-21 06:12:00; layover at ATL: 78 minutes.
  • DL1100: ATL 2026-12-21 07:30:00 → PHL 2026-12-21 09:31:00.

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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