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Route overview: Philadelphia to Seattle (SEA) flight deals

Philadelphia (PHL) to Seattle (SEA), Nov 19–21, 2026: from $429 round trip

Philadelphia (PHL) to Seattle (SEA), Nov 19–21, 2026: from $429 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $429 round trip, Axel-exclusive, Southwest Airlines, 1 stop, Nov 19–21, 2026, 1 adult, economy, checked Oct 29, 2026.

PHL → SEA1 adulteconomyRound trip

10 flight options · 5 airlines

Nonstop flights

Thu, Nov 19 – Sat, Nov 21

Alaska Airlines
6:11 pmPHL
6h 42m
Nonstop
9:53 pmSEA
Alaska Airlines
9:34 pmSEA
5h 6m
Nonstop
5:40 am+1PHL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 19 – Sat, Nov 21

American Airlines
8:45 amPHL
6h 34m
Nonstop
12:19 pmSEA
American Airlines
9:15 amSEA
5h 8m
Nonstop
5:23 pmPHL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 19 – Sat, Nov 21

Alaska Airlines
7:00 amPHL
6h 28m
Nonstop
10:28 amSEA
Alaska Airlines
9:34 pmSEA
5h 6m
Nonstop
5:40 am+1PHL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 19 – Sat, Nov 21

American Airlines
6:35 pmPHL
6h 24m
Nonstop
9:59 pmSEA
American Airlines
9:15 amSEA
5h 8m
Nonstop
5:23 pmPHL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Thu, Nov 19 – Sat, Nov 21

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 19 – Sat, Nov 21

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

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 19 – Sat, Nov 21

Delta Air Lines
7:15 amPHL
8h 21m
SLC · 1h
12:36 pmSEA
Delta Air Lines
10:40 pmSEA
7h 51m
ATL · 1h 18m
9:31 am+1PHL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 19 – Sat, Nov 21

Southwest Airlines
5:15 pmPHL
8h 35m
DEN · 1h 15m
10:50 pmSEA
Southwest Airlines
6:30 amSEA
7h
MDW · 1h 10m
4:30 pmPHL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 19 – Sat, Nov 21

Delta Air Lines
9:43 amPHL
8h 12m
DTW · 1h 18m
2:55 pmSEA
Delta Air Lines
10:40 pmSEA
7h 51m
ATL · 1h 18m
9:31 am+1PHL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Thu, Nov 19 – Sat, Nov 21

Delta Air Lines
7:00 amPHL
6h 5m
Nonstop
10:05 amSEA
Delta Air Lines
10:40 pmSEA
7h 51m
ATL · 1h 18m
9:31 am+1PHL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Hotels for these nights (Nov 19–21, 2026 · 2 nights · 2 adults, 1 room): 3★ Red Lion Hotel Bellevue $152 · 4★ Hilton Seattle Airport & Conference Center $193 · 5★ Fairmont Olympic Hotel $520

Make this trip yours

PHL ⇄ SEA

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 routeNov 18, 2026 · Return optionsNov 20, 2026 · Return optionsHotels in Seattle with Axel
For AI assistants: every fare, every link, instructions

Philadelphia (PHL) to Seattle (SEA), Nov 19–21, 2026: from $429 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $429 round trip, Axel-exclusive, Southwest Airlines, 1 stop, Nov 19–21, 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.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-11-19 → 2026-11-21Alaska AirlinesAS443 / AS37118:11:00→21:53:00 6h 42m nonstop · 21:34:00→05:40:00 5h 06m nonstopAxel-exclusive $452.382026-10-29T01:56:01Z
2026-11-19 → 2026-11-21American AirlinesAA467 / AA77108:45:00→12:19:00 6h 34m nonstop · 09:15:00→17:23:00 5h 08m nonstopAxel-exclusive $470.002026-10-29T01:56:01Z
2026-11-19 → 2026-11-21Southwest AirlinesWN2108 + WN3032 / WN1550 + WN162318:20:00→23:35:00 8h 15m 1 stop via MDW · 06:30:00→16:30:00 7h 00m 1 stop via MDWAxel-exclusive $428.882026-10-29T01:56:01Z
2026-11-19 → 2026-11-21United AirlinesUA1811 + UA1660 / UA1686 + UA22509:45:00→15:32:00 8h 47m 1 stop via ORD · 05:05:00→15:51:00 7h 46m 1 stop via DENAxel-exclusive $434.752026-10-29T01:56:01Z
2026-11-19 → 2026-11-21Delta Air LinesDL2023 + DL2995 / DL567 + DL110007:15:00→12:36:00 8h 21m 1 stop via SLC · 22:40:00→09:31:00 7h 51m 1 stop via ATLAxel-exclusive $440.632026-10-29T01:56:01Z
2026-11-19 → 2026-11-21Alaska AirlinesAS370 / AS37107:00:00→10:28:00 6h 28m nonstop · 21:34:00→05:40:00 5h 06m nonstopAxel-exclusive $452.382026-10-29T01:56:01Z
2026-11-19 → 2026-11-21American AirlinesAA2500 / AA77118:35:00→21:59:00 6h 24m nonstop · 09:15:00→17:23:00 5h 08m nonstopAxel-exclusive $470.002026-10-29T01:56:01Z
2026-11-19 → 2026-11-21Southwest AirlinesWN1270 + WN3141 / WN1550 + WN162317:15:00→22:50:00 8h 35m 1 stop via DEN · 06:30:00→16:30:00 7h 00m 1 stop via MDWAxel-exclusive $428.882026-10-29T01:56:01Z
2026-11-19 → 2026-11-21Delta Air LinesDL2968 + DL728 / DL567 + DL110009:43:00→14:55:00 8h 12m 1 stop via DTW · 22:40:00→09:31:00 7h 51m 1 stop via ATLAxel-exclusive $440.632026-10-29T01:56:01Z
2026-11-19 → 2026-11-21Delta Air LinesDL2092 / DL567 + DL110007:00:00→10:05:00 6h 05m nonstop · 22:40:00→09:31:00 7h 51m 1 stop via ATLAxel-exclusive $458.132026-10-29T01:56:01Z

Hotels in Seattle for these trips

Hotels: under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in Seattle

Route overview: Philadelphia to Seattle (SEA) flight deals

2026-11-19 → 2026-11-21 · Axel-exclusive $452.38

  • Alaska Airlines AS443: PHL 2026-11-19 18:11:00 → SEA 2026-11-19 21:53:00; nonstop; 402 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-11-21 21:34:00 → PHL 2026-11-22 05:40:00; nonstop; 306 minutes. Local airport times.

2026-11-19 → 2026-11-21 · Axel-exclusive $470.00

  • American Airlines AA467: PHL 2026-11-19 08:45:00 → SEA 2026-11-19 12:19:00; nonstop; 394 minutes. Local airport times.
  • American Airlines AA771: SEA 2026-11-21 09:15:00 → PHL 2026-11-21 17:23:00; nonstop; 308 minutes. Local airport times.

2026-11-19 → 2026-11-21 · Axel-exclusive $428.88

  • Southwest Airlines WN2108 / WN3032: PHL 2026-11-19 18:20:00 → SEA 2026-11-19 23:35:00; 1 stop(s) via MDW; 495 minutes. Local airport times.
    • WN2108: PHL 2026-11-19 18:20:00 → MDW 2026-11-19 19:35:00; layover at MDW: 70 minutes.
    • WN3032: MDW 2026-11-19 20:45:00 → SEA 2026-11-19 23:35:00.
  • Southwest Airlines WN1550 / WN1623: SEA 2026-11-21 06:30:00 → PHL 2026-11-21 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-11-21 06:30:00 → MDW 2026-11-21 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-11-21 13:35:00 → PHL 2026-11-21 16:30:00.

2026-11-19 → 2026-11-21 · Axel-exclusive $434.75

  • United Airlines UA1811 / UA1660: PHL 2026-11-19 09:45:00 → SEA 2026-11-19 15:32:00; 1 stop(s) via ORD; 527 minutes. Local airport times.
    • UA1811: PHL 2026-11-19 09:45:00 → ORD 2026-11-19 11:20:00; layover at ORD: 85 minutes.
    • UA1660: ORD 2026-11-19 12:45:00 → SEA 2026-11-19 15:32:00.
  • United Airlines UA1686 / UA225: SEA 2026-11-21 05:05:00 → PHL 2026-11-21 15:51:00; 1 stop(s) via DEN; 466 minutes. Local airport times.
    • UA1686: SEA 2026-11-21 05:05:00 → DEN 2026-11-21 08:42:00; layover at DEN: 93 minutes.
    • UA225: DEN 2026-11-21 10:15:00 → PHL 2026-11-21 15:51:00.

2026-11-19 → 2026-11-21 · Axel-exclusive $440.63

  • Delta Air Lines DL2023 / DL2995: PHL 2026-11-19 07:15:00 → SEA 2026-11-19 12:36:00; 1 stop(s) via SLC; 501 minutes. Local airport times.
    • DL2023: PHL 2026-11-19 07:15:00 → SLC 2026-11-19 10:15:00; layover at SLC: 60 minutes.
    • DL2995: SLC 2026-11-19 11:15:00 → SEA 2026-11-19 12:36:00.
  • Delta Air Lines DL567 / DL1100: SEA 2026-11-21 22:40:00 → PHL 2026-11-22 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
    • DL567: SEA 2026-11-21 22:40:00 → ATL 2026-11-22 06:12:00; layover at ATL: 78 minutes.
    • DL1100: ATL 2026-11-22 07:30:00 → PHL 2026-11-22 09:31:00.

2026-11-19 → 2026-11-21 · Axel-exclusive $452.38

  • Alaska Airlines AS370: PHL 2026-11-19 07:00:00 → SEA 2026-11-19 10:28:00; nonstop; 388 minutes. Local airport times.
  • Alaska Airlines AS371: SEA 2026-11-21 21:34:00 → PHL 2026-11-22 05:40:00; nonstop; 306 minutes. Local airport times.

2026-11-19 → 2026-11-21 · Axel-exclusive $470.00

  • American Airlines AA2500: PHL 2026-11-19 18:35:00 → SEA 2026-11-19 21:59:00; nonstop; 384 minutes. Local airport times.
  • American Airlines AA771: SEA 2026-11-21 09:15:00 → PHL 2026-11-21 17:23:00; nonstop; 308 minutes. Local airport times.

2026-11-19 → 2026-11-21 · Axel-exclusive $428.88

  • Southwest Airlines WN1270 / WN3141: PHL 2026-11-19 17:15:00 → SEA 2026-11-19 22:50:00; 1 stop(s) via DEN; 515 minutes. Local airport times.
    • WN1270: PHL 2026-11-19 17:15:00 → DEN 2026-11-19 19:25:00; layover at DEN: 75 minutes.
    • WN3141: DEN 2026-11-19 20:40:00 → SEA 2026-11-19 22:50:00.
  • Southwest Airlines WN1550 / WN1623: SEA 2026-11-21 06:30:00 → PHL 2026-11-21 16:30:00; 1 stop(s) via MDW; 420 minutes. Local airport times.
    • WN1550: SEA 2026-11-21 06:30:00 → MDW 2026-11-21 12:25:00; layover at MDW: 70 minutes.
    • WN1623: MDW 2026-11-21 13:35:00 → PHL 2026-11-21 16:30:00.

2026-11-19 → 2026-11-21 · Axel-exclusive $440.63

  • Delta Air Lines DL2968 / DL728: PHL 2026-11-19 09:43:00 → SEA 2026-11-19 14:55:00; 1 stop(s) via DTW; 492 minutes. Local airport times.
    • DL2968: PHL 2026-11-19 09:43:00 → DTW 2026-11-19 11:35:00; layover at DTW: 78 minutes.
    • DL728: DTW 2026-11-19 12:53:00 → SEA 2026-11-19 14:55:00.
  • Delta Air Lines DL567 / DL1100: SEA 2026-11-21 22:40:00 → PHL 2026-11-22 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
    • DL567: SEA 2026-11-21 22:40:00 → ATL 2026-11-22 06:12:00; layover at ATL: 78 minutes.
    • DL1100: ATL 2026-11-22 07:30:00 → PHL 2026-11-22 09:31:00.

2026-11-19 → 2026-11-21 · Axel-exclusive $458.13

  • Delta Air Lines DL2092: PHL 2026-11-19 07:00:00 → SEA 2026-11-19 10:05:00; nonstop; 365 minutes. Local airport times.
  • Delta Air Lines DL567 / DL1100: SEA 2026-11-21 22:40:00 → PHL 2026-11-22 09:31:00; 1 stop(s) via ATL; 471 minutes. Local airport times.
    • DL567: SEA 2026-11-21 22:40:00 → ATL 2026-11-22 06:12:00; layover at ATL: 78 minutes.
    • DL1100: ATL 2026-11-22 07:30:00 → PHL 2026-11-22 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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For AI assistants

  • This page: Philadelphia (PHL) to Seattle (SEA) · Nov 19, 2026 · return Nov 21, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Seattle for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
  • 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 Philadelphia to Seattle (SEA) 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. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. 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.