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

Popular airlines from Philadelphia Intl. Airport (PHL) to Seattle, WA (BFI-Boeing Field)

Alternative airports near Seattle

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Seattle - Tacoma Intl. SEA. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $537
SEA
Seattle - Tacoma Intl.
Cheapest
Average driving time to city center20 min
Flights from $537
Select flight to Snohomish County - Paine Field PAE. Average driving time to city center is 29 minutes. Flights from $924
PAE
Snohomish County - Paine Field
Average driving time to city center29 min
Flights from $924

Frequently asked questions

How much does a flight from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI) cost?
Get a cheap one-way flight or cheap return flight from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight deals on this route.
What is the cheapest month to fly from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI)?
The cheapest month to fly from PHL to BFI is , when demand is low. Off-peak months are generally when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI)?
Expedia's filter tool lets you easily compare different airlines, travel time and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest PHL to BFI flight.
How many flights per day from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI)?
Nonstop flights from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from PHL to BFI?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays are often the quietest.* However, this can vary based on the airline, time of year and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI)?
To avoid possible delays on the Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI) route, fly before 3 PM. Departures after this time are 22% more likely to be canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Seattle from Philadelphia Intl. Airport (PHL)?
If you're traveling on a direct flight from Philadelphia Intl. Airport (PHL) to Seattle, Seattle - Tacoma Intl. Airport (SEA) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI) last-minute?
Holding off until right before your break to book a ticket from PHL to BFI often results in higher prices. While you may come across some last-minute deals, there's no guarantee. Be flexible with your travel plans for the best chance of scoring a bargain.
Is it cheaper to book a PHL to BFI flight and hotel package?
You'll generally save money by booking a PHL to BFI flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's simple to manage everything in one convenient place. Once you've selected your ideal accommodations and flights, consider adding extras such as activities, car rentals and tours.
Can I cancel or change the date of my flight from Philadelphia Intl. Airport (PHL) to Boeing Field Airport (BFI)?
If you booked your PHL to BFI flight in the last 24 hours, you may be able to modify or cancel it at no cost. Depending on the airline and the type of fare you purchased, additional charges may apply for changes beyond that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal for more information.

Travel information

Travel information

Origin airport
Philadelphia Intl.
Destination airport
Boeing Field
Distance
2371 mi

Book with confidence

Book with confidence

Philadelphia to Seattle Flights

The cheapest times to fly from Philadelphia to Seattle

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Philadelphia to Seattle are during the month of . You can find some of the cheapest flights from Philadelphia to Seattle with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Philadelphia to Seattle

Sunday is one of the best days to book for cheap flights from Philadelphia to Seattle: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Philadelphia to Seattle

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Philadelphia to Seattle in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Philadelphia to Seattle flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Philadelphia to Seattle airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Philadelphia to Seattle Flights

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*Available to One Key members.