Cheap Flights from Philadelphia (PHL) to Seattle (SEA) from HK$1,121~

View HK$1,121 flight on Fri, 30 May 2025Opens in a new window

Popular airlines from Philadelphia Intl. Airport (PHL) to Seattle-Tacoma International Airport (SEA)

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Find Cheap Flights from Philadelphia (PHL) to Seattle (SEA)

Prices were available within the past 7 days and start at HK$1,121 for one-way flights and HK$2,940 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$2,940 Return, found 2 days ago
HK$2,940
Return
found 2 days ago
Select Delta flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$2,940 found 2 days ago
Delta
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,101 Return, found 2 days ago
HK$3,101
Return
found 2 days ago
Select Delta flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,101 found 2 days ago
Delta
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,167 Return, found 2 days ago
HK$3,167
Return
found 2 days ago
Select Delta flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,167 found 2 days ago
American Airlines
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,252 Return, found 2 days ago
HK$3,252
Return
found 2 days ago
Select American Airlines flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,252 found 2 days ago
Delta
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,327 Return, found 2 days ago
HK$3,327
Return
found 2 days ago
Select Delta flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,327 found 2 days ago
Delta
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,328 Return, found 2 days ago
HK$3,328
Return
found 2 days ago
Select Delta flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,328 found 2 days ago
Delta
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,445 Return, found 2 days ago
HK$3,445
Return
found 2 days ago
Select Delta flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,445 found 2 days ago
Delta
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,478 Return, found 2 days ago
HK$3,478
Return
found 2 days ago
Select Delta flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,478 found 2 days ago
Delta
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,488 Return, found 2 days ago
HK$3,488
Return
found 2 days ago
Select Delta flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,488 found 2 days ago
United
Tue, 17 Jun - Mon, 22 Dec
PHL
Philadelphia
SEA
Seattle
HK$3,553 Return, found 2 days ago
HK$3,553
Return
found 2 days ago
Select United flight, departing Tue, 17 Jun from Philadelphia to Seattle, returning Mon, 22 Dec, priced at HK$3,553 found 2 days ago

Frequently asked questions

How much is a flight from Philadelphia Intl. Airport (PHL) to SEA?
If you’re planning on traveling from Philadelphia Intl. Airport (PHL) to Seattle - Tacoma Intl. Airport (SEA), round-trip flights start from HK$2,940. This figure is based on airfares available within the last 7 days on Expedia for flights departing within the next year, so don’t hang about. Book now and save yourself both money and time. Prices and availability are subject to change. Additional terms apply.
Do I need to pay a cancellation fee if I cancel my flight from Philadelphia Intl. Airport (PHL) to Sea-Tac Airport?
We understand that circumstances change unexpectedly, so we’ve made it as simple as possible for you to cancel your flight online. Just visit the Customer Service Portal and follow the instructions.
How do I find cheap flights from Philadelphia Airport to Sea-Tac Airport that have flexible change policies?
Many airlines offer the option to reschedule your flight without a change fee. All you pay is the difference between the original flight and the new flight. When you’re searching for PHL to SEA flights, you’ll see a “no change fees” filter for you to select.
How far is the flight from Philadelphia Intl. Airport (PHL) to Sea-Tac Airport?
The flying distance between PHL and SEA is 3,800 kilometers. Sneak in a nap or make a start on the latest bestseller and the journey will zip by.
Which airlines fly direct from Philadelphia Intl. Airport (PHL) to Sea-Tac Airport?
There are a few airlines that fly from PHL to Seattle - Tacoma Intl. Airport (SEA). Alaska Airlines (AS) is a great choice, offering 30 flights every month. Operating 30 flights each month on this route, American Airlines (AA) is another traveler favorite.
Are PHL to Seattle - Tacoma Intl. Airport (SEA) flight tickets cheaper when they're purchased at the last minute?
Last-minute bookings from PHL to Seattle - Tacoma Intl. Airport (SEA) can be hit-or-miss. You may be able to score a great bargain, but then again, you could miss out! If you’d rather play it safe and start planning your trip early on, Expedia compares flight deals up to 12 months in advance. Just keep in mind that not all airlines publish their prices that far in advance. Our suggestion? Check back often as prices are updated regularly.
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