Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
75 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Seattle → Philadelphia
SEA
SeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International AirportPHLPhiladelphiaPhiladelphia International Airport
PhiladelphiaPhiladelphia International Airport- Distance
- 2,372 mi
- Estimated flight time
- ~5h 15m
Philadelphia is currently 3 hours ahead of Seattle.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 2.75 flights a day, observed from October 2025 to September 2026.
- 2.8
- flights per day
- 5
- busiest month · Jun
- 1
- quietest month · Feb
- 4 hr 28 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 2Jan2026
- 1Feb
- 2Mar
- 2.5Apr
- 3May
- 5Jun
- 5Jul
- 4Aug
- 4Sep
- 3.5Oct2025
- 2Nov
- 2Dec
Airlines
Who flies it
American Airlinesall year
Alaska Airlinesall year
Delta Air Linessummer
Through the day
Departure times
Local time in Seattle. Most departures between 21:00 and 00:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 2.4Mon
- 1.8Tue
- 2.3Wed
- 2.5Thu
- 2.3Fri
- 2.5Sat
- 2.9Sun
Fleet
Aircraft observed
- Airbus A321A32132%
- Airbus A321neoA21N21%
- Boeing 737 MAX 9B39M20%
- Boeing 737-900B73920%
- Boeing 737-800B7385%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 38 |
|
| February 2026 | 1 | 25 |
|
| March 2026 | 2 | 43 |
|
| April 2026 | 2.5 | 71 |
|
| May 2026 | 3 | 73 |
|
| June 2026 | 5 | 112 |
|
| July 2026 | 5 | 133 |
|
| August 2026 | 4 | 98 |
|
| September 2026 | 4 | 89 |
|
| October 2025 | 3.5 | 80 |
|
| November 2025 | 2 | 56 |
|
| December 2025 | 2 | 39 |
|
Airlines observed on this route
From observed callsign routes on SEA-PHL - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Seattle: 132.
- Direct destinations observed from Philadelphia: 139.
The airports on this route
Philadelphia International Airport
Philadelphia, United StatesPHL / KPHL
Major airport · 139 direct destinations · 4 runways · longest runway 12,001 ft
67 °F · RainSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
BFI PHLKing County International Airport - Boeing FieldSeattle is about 6 mi from Seattle.View route →SEA EWRNewark Liberty International AirportNewark is about 80 mi from Philadelphia.View route →SEA BWIBaltimore/Washington International Thurgood Marshall AirportBaltimore is about 90 mi from Philadelphia.View route →
About the route from Seattle to Philadelphia
The observed direct connection between Seattle–Tacoma International Airport (SEA) and Philadelphia International Airport (PHL) covers approximately 2,372 mi. The estimated flight time is around 5h 15m. Alaska Airlines, American Airlines and Delta Air Lines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Seattle from Philadelphia by air?
- The great-circle distance between Seattle–Tacoma International Airport and Philadelphia International Airport is approximately 2,372 mi.
- How long is the flight from Seattle to Philadelphia?
- Based on the distance, the estimated flight time is about 5h 15m. This is an estimate, not a schedule.
- Is there a direct connection from Seattle to Philadelphia?
- Yes, a direct connection between SEA and PHL has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Alaska Airlines, American Airlines and Delta Air Lines.
- How often is there a flight from Seattle to Philadelphia?
- On average around 2.75 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 857 observed flights. Mainly American Airlines, Alaska Airlines, Delta Air Lines. That is an observation, not a timetable.
- What is the current time difference between Seattle and Philadelphia?
- Philadelphia is currently 3 hours ahead of Seattle.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.