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฿7,045 Cheap Flights from Philadelphia (PHL) to Seattle (SEA)

View ฿7,045 flight on Fri, 4 Sept 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at ฿7,045 for one-way flights and ฿12,405 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿12,405 Return, found 2 days ago
฿12,405
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿12,405 found 2 days ago
Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿12,740 Return, found 2 days ago
฿12,740
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿12,740 found 2 days ago
Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿13,545 Return, found 2 days ago
฿13,545
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿13,545 found 2 days ago
Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿13,880 Return, found 2 days ago
฿13,880
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿13,880 found 2 days ago
Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿14,730 Return, found 2 days ago
฿14,730
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿14,730 found 2 days ago
Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿15,065 Return, found 2 days ago
฿15,065
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿15,065 found 2 days ago
American Airlines
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿15,260 Return, found 2 days ago
฿15,260
Return
found 2 days ago
Select American Airlines flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿15,260 found 2 days ago
Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿15,265 Return, found 2 days ago
฿15,265
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿15,265 found 2 days ago
Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿15,600 Return, found 2 days ago
฿15,600
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿15,600 found 2 days ago
Delta
Fri, 4 Sept - Sat, 12 Sept
PHL
Philadelphia
SEA
Seattle
฿15,730 Return, found 2 days ago
฿15,730
Return
found 2 days ago
Select Delta flight, departing Fri, 4 Sept from Philadelphia to Seattle, returning Sat, 12 Sept, priced at ฿15,730 found 2 days ago

Find the cheapest month to fly from Philadelphia (PHL) to Seattle (SEA)

September is typically the cheapest month to fly

From ฿7,663 - ฿10,686 per traveller.

Frequently asked questions

How much is a flight from Philadelphia Intl. Airport (PHL) to SEA?
If you're planning on travelling from Philadelphia Intl. Airport (PHL) to Seattle - Tacoma Intl. Airport (SEA), round-trip flights start from ฿12,405. 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 kilometres. 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 traveller favourite.
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.

Travel information

Origin airport
Philadelphia Intl.
Destination airport
Seattle - Tacoma Intl.
Return price
฿12,405
Distance
3794 km
Average flight time
3 hours 6 mins

Book with confidence

Perfect flights from Philadelphia to Seattle

Embark on an unforgettable journey without breaking the bank with Expedia's incredible deals on cheap flights from Philadelphia to Seattle. Whether you're aching for a romantic escape with your partner, craving an adventurous solo expedition, or yearning to immerse yourself in the local history and culture, we've got you covered.
 
Picture yourself strolling through the streets of , surrounded by breathtaking architecture and absorbing the vibrant atmosphere of this captivating city. Indulge in the mouth-watering local specialties, from tantalizing street food to exquisite fine dining. With Expedia, you can experience all of this and more, without sacrificing your budget.
 
Our flexible Philadelphia Intl. to Seattle - Tacoma Intl. ticket options cater to your travel preferences, with incredible one-way fares from ฿7,045 and roundtrip prices from ฿12,405. Whether you're planning a short city break or a longer adventure, our dynamic pricing ensures that you find the best deals for your journey.
 
But the magic doesn't stop there. Expedia offers a range of partner services to enhance your trip. Rent a car at Seattle - Tacoma Intl. and explore and its surrounding areas at your own pace. Discover hidden gems off the beaten path, and create unforgettable memories. We also provide a handpicked selection of accommodations, from charming bed and breakfasts to luxury hotels, ensuring that you have a comfortable and memorable stay.
 
Planning your next great adventure is a breeze with Expedia. Our user-friendly platform, unbeatable prices, and round-the-clock customer support are designed to make your travel experience seamless and stress-free. So, why wait? Book your to travel arrangements today and embark on the journey of a lifetime in Seattle.
Perfect flights from Philadelphia to Seattle
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