SEA → PHLSeattle to Philadelphia

live

Direct flights from Seattle (SEA) to Philadelphia (PHL): 42 nonstop departures observed each week across 3 airlines. 81% of the last 26 tracked flights arrived within 15 minutes of schedule. The median arrival is 7 minutes early. 1 of the 26 tracked flights was cancelled. The nonstop covers 3,818 km, an estimated 5 hours 24 minutes in the air. Measured by Pro Flight Search from live flight boards at Seattle and Philadelphia. Updated 3 November 2026 at 14:05 UTC.

Today, SEA → PHL

Tue 3 Nov · local times
  1. 08:32 AS442Alaska Est. 08:27Gate N14 PHL est. 16:58 +13sched 16:45
  2. 09:15 AA2882American On scheduleGate D9 PHL 17:22scheduled
  3. 21:28 AS371Alaska Sched 21:28Departure not confirmed by the board ·

Checked SEA board 06:05 · PHL board 08:19

SEA Seattle busy · +16
PHL Philadelphia smooth · +0
3,818 km · ~5h 24m est.
dep bank 08:24–22:4842x weekly
Runs reliable · 3 airlines · 42x weekly · nonstop
81% on time

of the last 26 tracked SEA → PHL flights arrived within 15 minutes

Median arrival delay is −7 min. 1 of 26 tracked legs cancelled in the sample. Will a delayed flight be cancelled? →

Median arrival−7 minacross the last 25 arrivals
Flight time~5h 24mestimated from route distance
Weekly departures42x3 direct airlines on the leg
Cancelled3.8%recent route rate · 1 of 26

The week

scheduled departures · origin local time
06121824
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Alaska AirlinesAmerican AirlinesDelta Air Lines

Each mark is a scheduled departure at its origin-local time, observed operating in the last 7 days. Today is highlighted.

Who flies it

observed on the boards · 7 days
Alaska AirlinesAS100% on time

Flights AS442 09:19 daily · AS371 21:29 daily

American AirlinesAA73% on time

Flights AA986 08:24 daily · AA2882 09:15 Mo Tu · AA2203 12:34 Mo Su · AA2870 12:49 Mo Th Fr Su

Delta Air LinesDL60% on time

Flights DL1114 21:30 Mo Tu We Th Fr Su

History

operated legs · board outcomes
11-02AA2203arrived−7
11-02AA2882arrived+29
11-02AS371arrived−10
11-02AS442arrived+11
11-02DL1114arrived+20
11-01AA2203arrived−2
11-01AA2882cancelledCNX
11-01AS371arrived−5
11-01AS442arrived−17
11-01DL1114arrived+2
10-31AA986arrived+219
10-31AS442arrived−1
10-30AA2870arrived−24
10-30AA2886arrived−12
10-30AA986arrived−43
10-30AS371arrived−16
10-30AS442arrived+6
10-30DL1114arrived+21
10-29AA2870arrived−37
10-29AA2886arrived−13
10-29AA986arrived−35
10-29AS371arrived−18
10-29AS442arrived−26
10-29DL1114arrived+4
10-28AS371arrived−18
10-28DL1114arrived−7

Actual board outcomes rather than schedules, paired departure and arrival per flight and day.

Full board history, day by day →

Airports right now

live boards
SEASeattle +16 min busy 🌤 overcast · N 6 kt Full SEA delay board →
PHLPhiladelphia +0 min smooth 🌤 mostly cloudy · SSW 5 kt Full PHL delay board →

Weather lens

Conditions are tightest at SEA and PHL: a 35% chance of a 15+ minute delay. In this weather, the more delayed of the two airports is typically about +7 min. Both figures come from the two airports' delay records in similar weather. See live delays → · Weather risk by airport →

How the Seattle to Philadelphia route actually runs

Pro Flight Search records official board updates for nonstop SEA to PHL flights through the day: schedules, estimates, gate pushes and actual departures. The verdict above comes from operated flights, so it reflects what this route does rather than what the timetable promises.

Planning around a delay? Live airport delays · Weather delay risk map · Will a delayed flight be cancelled? · Do planes make up time in the air? · How we measure

Cite this data

Journalists, bloggers, and researchers may cite this page with attribution and a link to Pro Flight Search.

Suggested citation

Pro Flight Search: Seattle (SEA) to Philadelphia (PHL) route reliability, measured from operated flights on official airport boards.

Canonical URL
https://proflightsearch.com/search-flights/SEA-PHL
How we measure this →

SEA to PHL questions

Is SEA–PHL running on time right now?

Smooth skies ahead. The departure side at SEA is the weaker end, route health score 89/100. The airports section above carries the live status and delay window at both ends.

Morning or evening flight on SEA–PHL?

Operators schedule morning departures around 08:24 and evening departures around 21:29 from SEA. Earlier flights typically land before destination-airport delays accumulate later in the day; check the PHL delay card to confirm conditions when you'd arrive.

How long is the flight from SEA to PHL?

Great-circle distance is 3,818 km. With typical jet cruise speed plus taxi, climb and descent, expect roughly 300–357 min gate-to-gate on this route.

How often does SEA–PHL fly?

3 carriers operate this route, around 42 flights a week between them. Compare carrier days and times in the airline list above.