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Route overview: Seattle to Philadelphia (PHL) flight deals

Seattle → Philadelphia

Dec 3, 2026 · return Dec 5, 2026

SEA → PHL1 adulteconomyRound trip

10 flight options · 5 airlines

Nonstop flights

Thu, Dec 3 – Sat, Dec 5

Alaska Airlines
9:28 pmSEA
5h 4m
Nonstop
5:32 am+1PHL
Alaska Airlines
6:46 pmPHL
6h 10m
Nonstop
9:56 pmSEA

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Sat, Dec 5

American Airlines
12:20 pmSEA
5h 5m
Nonstop
8:25 pmPHL
American Airlines
6:48 pmPHL
6h 29m
Nonstop
10:17 pmSEA

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Sat, Dec 5

Alaska Airlines
8:32 amSEA
5h 13m
Nonstop
4:45 pmPHL
Alaska Airlines
6:46 pmPHL
6h 10m
Nonstop
9:56 pmSEA

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Sat, Dec 5

American Airlines
9:15 amSEA
5h 8m
Nonstop
5:23 pmPHL
American Airlines
6:48 pmPHL
6h 29m
Nonstop
10:17 pmSEA

Round-trip total · 1 adult · Taxes included

One-stop flights

Thu, Dec 3 – Sat, Dec 5

Southwest Airlines
6:30 amSEA
7h
MDW · 1h 10m
4:30 pmPHL
Southwest Airlines
6:20 pmPHL
8h 15m
MDW · 1h 10m
11:35 pmSEA

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Sat, Dec 5

United Airlines
5:05 amSEA
7h 46m
DEN · 1h 33m
3:51 pmPHL
United Airlines
9:45 amPHL
8h 47m
ORD · 1h 25m
3:32 pmSEA

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Sat, Dec 5

Delta Air Lines
1:50 pmSEA
7h 4m
MSP · 1h 9m
11:54 pmPHL
Delta Air Lines
7:15 amPHL
8h 21m
SLC · 1h
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Sat, Dec 5

Alaska Airlines
11:40 pmSEA
7h 10m
ORD · 1h 8m
9:50 am+1PHL
Alaska Airlines
6:46 pmPHL
6h 10m
Nonstop
9:56 pmSEA

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Sat, Dec 5

Delta Air Lines
6:00 amSEA
7h 35m
DTW · 1h 47m
4:35 pmPHL
Delta Air Lines
7:15 amPHL
8h 21m
SLC · 1h
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Thu, Dec 3 – Sat, Dec 5

Delta Air Lines
9:38 pmSEA
5h 5m
Nonstop
5:43 am+1PHL
Delta Air Lines
7:15 amPHL
8h 21m
SLC · 1h
12:36 pmSEA

Round-trip total · 1 adult · Taxes included

Make this trip yours

SEA ⇄ 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 routeDec 2, 2026 → Dec 4, 2026Dec 4, 2026 → Dec 6, 2026
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.

Live price for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the flights there to get the current bookable total; the listed prices are the ones issued at the times shown.

Route overview: Seattle to Philadelphia (PHL) flight deals

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-03 → 2026-12-05Alaska AirlinesAS371 / AS443$395.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05American AirlinesAA2358 / AA2500$410.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05Southwest AirlinesWN1550 + WN1623 / WN2108 + WN3032$365.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05United AirlinesUA1686 + UA225 / UA1811 + UA1660$375.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05Delta Air LinesDL942 + DL2703 / DL2023 + DL2995$380.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05Alaska AirlinesAS442 / AS443$395.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05American AirlinesAA771 / AA2500$410.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05Alaska AirlinesAS328 + AA970 / AS443$375.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05Delta Air LinesDL812 + DL1391 / DL2023 + DL2995$380.002026-10-29T01:16:02Z
2026-12-03 → 2026-12-05Delta Air LinesDL1114 / DL2023 + DL2995$405.002026-10-29T01:16:02Z

2026-12-03 → 2026-12-05 · $395.00

  • Alaska Airlines AS371: SEA 2026-12-03 21:28:00 → PHL 2026-12-04 05:32:00; nonstop; 304 minutes. Local airport times.
  • Alaska Airlines AS443: PHL 2026-12-05 18:46:00 → SEA 2026-12-05 21:56:00; nonstop; 370 minutes. Local airport times.

2026-12-03 → 2026-12-05 · $410.00

  • American Airlines AA2358: SEA 2026-12-03 12:20:00 → PHL 2026-12-03 20:25:00; nonstop; 305 minutes. Local airport times.
  • American Airlines AA2500: PHL 2026-12-05 18:48:00 → SEA 2026-12-05 22:17:00; nonstop; 389 minutes. Local airport times.

2026-12-03 → 2026-12-05 · $365.00

  • Southwest Airlines WN1550 / WN1623: SEA 2026-12-03 06:30:00 → PHL 2026-12-03 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-12-03 06:30:00 → MDW 2026-12-03 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-12-03 13:35:00 → PHL 2026-12-03 16:30:00.
  • Southwest Airlines WN2108 / WN3032: PHL 2026-12-05 18:20:00 → SEA 2026-12-05 23:35:00; 1 stop(s) via MDW; 495 minutes. Local airport times.
    • WN2108: PHL 2026-12-05 18:20:00 → MDW 2026-12-05 19:35:00; layover at MDW: 70 minutes.
    • WN3032: MDW 2026-12-05 20:45:00 → SEA 2026-12-05 23:35:00.

2026-12-03 → 2026-12-05 · $375.00

  • United Airlines UA1686 / UA225: SEA 2026-12-03 05:05:00 → PHL 2026-12-03 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-12-03 05:05:00 → DEN 2026-12-03 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-12-03 10:15:00 → PHL 2026-12-03 15:51:00.
  • United Airlines UA1811 / UA1660: PHL 2026-12-05 09:45:00 → SEA 2026-12-05 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-12-05 09:45:00 → ORD 2026-12-05 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-12-05 12:45:00 → SEA 2026-12-05 15:32:00.

2026-12-03 → 2026-12-05 · $380.00

  • Delta Air Lines DL942 / DL2703: SEA 2026-12-03 13:50:00 → PHL 2026-12-03 23:54:00; 1 stop(s) via MSP; 424 minutes. Local airport times.
    • DL942: SEA 2026-12-03 13:50:00 → MSP 2026-12-03 19:11:00; layover at MSP: 69 minutes.
    • DL2703: MSP 2026-12-03 20:20:00 → PHL 2026-12-03 23:54:00.
  • Delta Air Lines DL2023 / DL2995: PHL 2026-12-05 07:15:00 → SEA 2026-12-05 12:36:00; 1 stop(s) via SLC; 501 minutes. Local airport times.
    • DL2023: PHL 2026-12-05 07:15:00 → SLC 2026-12-05 10:15:00; layover at SLC: 60 minutes.
    • DL2995: SLC 2026-12-05 11:15:00 → SEA 2026-12-05 12:36:00.

2026-12-03 → 2026-12-05 · $395.00

  • Alaska Airlines AS442: SEA 2026-12-03 08:32:00 → PHL 2026-12-03 16:45:00; nonstop; 313 minutes. Local airport times.
  • Alaska Airlines AS443: PHL 2026-12-05 18:46:00 → SEA 2026-12-05 21:56:00; nonstop; 370 minutes. Local airport times.

2026-12-03 → 2026-12-05 · $410.00

  • American Airlines AA771: SEA 2026-12-03 09:15:00 → PHL 2026-12-03 17:23:00; nonstop; 308 minutes. Local airport times.
  • American Airlines AA2500: PHL 2026-12-05 18:48:00 → SEA 2026-12-05 22:17:00; nonstop; 389 minutes. Local airport times.

2026-12-03 → 2026-12-05 · $375.00

  • Alaska Airlines AS328 / AA970: SEA 2026-12-03 23:40:00 → PHL 2026-12-04 09:50:00; 1 stop(s) via ORD; 430 minutes. Local airport times.
    • AS328: SEA 2026-12-03 23:40:00 → ORD 2026-12-04 05:37:00; layover at ORD: 68 minutes.
    • AA970: ORD 2026-12-04 06:45:00 → PHL 2026-12-04 09:50:00.
  • Alaska Airlines AS443: PHL 2026-12-05 18:46:00 → SEA 2026-12-05 21:56:00; nonstop; 370 minutes. Local airport times.

2026-12-03 → 2026-12-05 · $380.00

  • Delta Air Lines DL812 / DL1391: SEA 2026-12-03 06:00:00 → PHL 2026-12-03 16:35:00; 1 stop(s) via DTW; 455 minutes. Local airport times.
    • DL812: SEA 2026-12-03 06:00:00 → DTW 2026-12-03 13:12:00; layover at DTW: 107 minutes.
    • DL1391: DTW 2026-12-03 14:59:00 → PHL 2026-12-03 16:35:00.
  • Delta Air Lines DL2023 / DL2995: PHL 2026-12-05 07:15:00 → SEA 2026-12-05 12:36:00; 1 stop(s) via SLC; 501 minutes. Local airport times.
    • DL2023: PHL 2026-12-05 07:15:00 → SLC 2026-12-05 10:15:00; layover at SLC: 60 minutes.
    • DL2995: SLC 2026-12-05 11:15:00 → SEA 2026-12-05 12:36:00.

2026-12-03 → 2026-12-05 · $405.00

  • Delta Air Lines DL1114: SEA 2026-12-03 21:38:00 → PHL 2026-12-04 05:43:00; nonstop; 305 minutes. Local airport times.
  • Delta Air Lines DL2023 / DL2995: PHL 2026-12-05 07:15:00 → SEA 2026-12-05 12:36:00; 1 stop(s) via SLC; 501 minutes. Local airport times.
    • DL2023: PHL 2026-12-05 07:15:00 → SLC 2026-12-05 10:15:00; layover at SLC: 60 minutes.
    • DL2995: SLC 2026-12-05 11:15:00 → SEA 2026-12-05 12:36:00.

Explore this route

For AI assistants

  • This page: Seattle (SEA) to Philadelphia (PHL) · Dec 3, 2026 · return Dec 5, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
  • 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 Seattle 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. Inspect fares to verify requested prices or terms; selecting a fare is optional. Use that fare’s booking link to preserve its Membership price basis. State anything unverified. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and explain what remains unresolved. Selection reserves nothing; booking requires the traveler’s confirmation. 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.