Seattle to Philadelphia flights from $381
Flights starting at $381. Choose between Alaska Airlines, American Airlines, or United Airlines to find the best price.
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Tips to know when travelling to Philadelphia
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Weekly direct flights
Mondays | Tuesdays | Wednesdays | Thursdays | Fridays | Saturdays | Sundays | |
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Direct flights | 4 | 4 | 4 | 4 | 4 | 3 | 4 |
American Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.
Alaska Airlines on Mondays, Tuesdays, Wednesdays, Thursdays, Fridays, Saturdays, and Sundays.
Check-in for a flight from Seattle to Philadelphia
Name | Carrier code | IATA Code | Passport needed during booking | Online check-in available |
---|---|---|---|---|
Alaska Airlines | ASA | AS | Yes | Opens 24 days before flight Closes 1 hours before flight |
American Airlines | AAL | AA | Yes | No |
United Airlines | UAL | UA | Yes | No |
Spirit Airlines | NKS | NK | No | Opens 24 days before flight Closes 1 hours before flight |
Frontier Airlines | FFT | F9 | No | Opens 24 days before flight Closes 1 hours before flight |
Philadelphia travel tips
1) Have breakfast at self-catering Di Bruno Bros in Philadelphia | Start your day in Philadelphia with breakfast at self-serve cafe upstairs Di Bruno Bros at 1730 Chestnut Street. Then, you may buy some good things like canned goods, olive oils, coffee, crackers, jams, jellies and cheeses. |
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2) See what life was like for early American settlers in Philadelphia | Make sure to walk around Elfreth's Alley in Philadelphia, America's oldest continuously inhabited residential street. Take a cup of flavoured coffee at ICI Macarons & Cafe; admire the gorgeous preserved homes and walk the cobblestone streets to see what life was like for early American settlers. |
3) Remember about BYOB (bring your own bottle) in the restaurants in Philadelphia | Philadelphia (as Pennsylvania itself) has some strange liquor laws. Spirits are extremely expensive at local restaurants. Many establishments let you visitors bring their own alcohol, so feel free to ask if it is possible. |
United States COVID-19 travel restrictions

Latest COVID-19 restrictions
United States
Travel is allowed
No proof of a negative pre-departure COVID-19 test required
No quarantine required

Most travelers from Seattle, SEA with proof of full COVID-19 vaccination can enter Philadelphia, PHL.
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Information is provided as guidance only and accurate at the time of publishing. Always check government websites and airline materials before booking and traveling.
Learn more about COVID-19 restrictions in United States in our dedicated Stories article.
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