Philadelphia International Airport
Philadelphia, United StatesPHL / KPHL
Major airport · 139 direct destinations · 4 runways · longest runway 12,001 ft
66 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Philadelphia → Seattle
PHL
PhiladelphiaPhiladelphia International Airport
PhiladelphiaPhiladelphia International AirportSEASeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International Airport- Distance
- 2,372 mi
- Estimated flight time
- ~5h 15m
Seattle is currently 3 hours behind Philadelphia.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 2.5 flights a day, observed from October 2025 to September 2026.
- 2.5
- flights per day
- 4
- busiest month · Jul
- 1
- quietest month · Mar
- 5 hr 27 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 2Jan2026
- 2Feb
- 1Mar
- 2Apr
- 3May
- 3Jun
- 4Jul
- 4Aug
- 3Sep
- 2Oct2025
- 3Nov
- 2Dec
Airlines
Who flies it
Alaska Airlinesall year
American Airlinesall year
Delta Air Linessummer
Through the day
Departure times
Local time in Philadelphia. Most departures between 07:00 and 10:00.
- 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
- 2.2Tue
- 2.3Wed
- 2.3Thu
- 2.4Fri
- 2.4Sat
- 2.4Sun
Fleet
Aircraft observed
- Airbus A321neoA21N26%
- Boeing 737 MAX 9B39M24%
- Airbus A321A32123%
- Boeing 737-900B73921%
- Boeing 737 MAX 8B38M4%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 52 |
|
| February 2026 | 2 | 22 |
|
| March 2026 | 1 | 15 |
|
| April 2026 | 2 | 44 |
|
| May 2026 | 3 | 79 |
|
| June 2026 | 3 | 95 |
|
| July 2026 | 4 | 130 |
|
| August 2026 | 4 | 119 |
|
| September 2026 | 3 | 99 |
|
| October 2025 | 2 | 65 |
|
| November 2025 | 3 | 68 |
|
| December 2025 | 2 | 55 |
|
Airlines observed on this route
From observed callsign routes on PHL-SEA - 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 Philadelphia: 139.
- Direct destinations observed from Seattle: 132.
The airports on this route
Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
70 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Philadelphia to Seattle
The observed direct connection between Philadelphia International Airport (PHL) and Seattle–Tacoma International Airport (SEA) 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 Philadelphia from Seattle by air?
- The great-circle distance between Philadelphia International Airport and Seattle–Tacoma International Airport is approximately 2,372 mi.
- How long is the flight from Philadelphia to Seattle?
- 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 Philadelphia to Seattle?
- Yes, a direct connection between PHL and SEA 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 Philadelphia to Seattle?
- On average around 2.5 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 843 observed flights. Mainly Alaska Airlines, American Airlines, Delta Air Lines. That is an observation, not a timetable.
- What is the current time difference between Philadelphia and Seattle?
- Seattle is currently 3 hours behind Philadelphia.
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.