Your next trip, last seen at €111
When to fly
Explore datesFind the dates that work for you
The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €111, departing 7 Dec 2026 (Last checked: 27 Oct 2026)One-way fareCheck live prices for this route
- Airlines seen
- American Airlines, Alaska Airlines, Delta Air Lines, Frontier Airlines, Southwest Airlines, United Airlines
- Reported fastest flight
- 5h 03m
- Non-stop
- Yes
About this route
Explore the fares we observed from Seattle to Philadelphia. Prices move often, so pick your dates to see the latest options.
- Route distance
- 3,819 km
- Reported fastest flight
- 5h 03m
- Alternative airports
- BFI, TTN
Route-level information; individual journeys vary.
Published schedules report non-stop service with American Airlines, Alaska Airlines. Check current timetables.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Airport to city: straight-line distance
- King County International Airport - Boeing Field (BFI) → Seattle, city gazetteer reference point (47.6062, -122.3321): ≈ 9 km.
- Seattle–Tacoma International Airport (SEA) → Seattle, city gazetteer reference point (47.6062, -122.3321): ≈ 18 km.
- Philadelphia International Airport (PHL) → Philadelphia, city gazetteer reference point (39.9523, -75.1638): ≈ 11 km.
- Trenton Mercer Airport (TTN) → Philadelphia, city gazetteer reference point (39.9523, -75.1638): ≈ 47 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Frequently asked
How much is a flight from Seattle to Philadelphia?
The lowest fare Routavio has observed is €111, found on 27 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Seattle to Philadelphia?
In our observations December 2026 is the cheapest month so far, at €111.
Are there direct flights from Seattle to Philadelphia?
Yes. Published schedules report non-stop flights on this route with American Airlines, Alaska Airlines.
Which airlines fly from Seattle to Philadelphia?
Routavio has seen these carriers on the route: American Airlines, Alaska Airlines, Delta Air Lines, Frontier Airlines, Southwest Airlines, United Airlines.
How long does the flight from Seattle to Philadelphia take?
Across the 73 fares Routavio observed, the average journey time is 17h 41m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Seattle to Philadelphia fares were non-stop?
38 of the 74 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.