Cheap Flights from Seattle to Philadelphia

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Flight deals from Seattle to Philadelphia

Looking for a cheap last-minute deal or the best round-trip flight from Seattle to Philadelphia? Find the lowest prices on one-way and round-trip tickets right here.

Philadelphia.AED 496 per passenger.Departing Mon, May 4, returning Sat, May 9.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Mon, May 4, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sat, May 9, arriving in Seattle / Tacoma International.Price includes taxes and charges.From AED 496, select.

Philadelphia.AED 553 per passenger.Departing Tue, Apr 14, returning Wed, Apr 29.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Tue, Apr 14, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Wed, Apr 29, arriving in Seattle / Tacoma International.Price includes taxes and charges.From AED 553, select.

Philadelphia.AED 736 per passenger.Departing Wed, Apr 29, returning Sun, May 3.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Wed, Apr 29, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Sun, May 3, arriving in Seattle / Tacoma International.Price includes taxes and charges.From AED 736, select.

Philadelphia.AED 918 per passenger.Departing Mon, Mar 16, returning Thu, Mar 19.Round-trip flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departing from Seattle / Tacoma International on Mon, Mar 16, arriving in Philadelphia International.Inbound indirect flight with Frontier Airlines, departing from Philadelphia International on Thu, Mar 19, arriving in Seattle / Tacoma International.Price includes taxes and charges.From AED 918, select.

Philadelphia.AED 1,017 per passenger.Departing Wed, Apr 1, returning Sat, Apr 4.Round-trip flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departing from Seattle / Tacoma International on Wed, Apr 1, arriving in Philadelphia International.Inbound direct flight with Alaska Airlines departing from Philadelphia International on Sat, Apr 4, arriving in Seattle / Tacoma International.Price includes taxes and charges.From AED 1,017, select.

Philadelphia.AED 1,017 per passenger.Departing Wed, Mar 18, returning Wed, Mar 25.Round-trip flight with Alaska Airlines.Outbound direct flight with Alaska Airlines departing from Seattle / Tacoma International on Wed, Mar 18, arriving in Philadelphia International.Inbound direct flight with Alaska Airlines departing from Philadelphia International on Wed, Mar 25, arriving in Seattle / Tacoma International.Price includes taxes and charges.From AED 1,017, select.

Philadelphia.AED 1,017 per passenger.Departing Tue, Jun 2, returning Sat, Jun 6.Round-trip flight with Delta.Outbound direct flight with Delta departing from Seattle / Tacoma International on Tue, Jun 2, arriving in Philadelphia International.Inbound direct flight with Delta departing from Philadelphia International on Sat, Jun 6, arriving in Seattle / Tacoma International.Price includes taxes and charges.From AED 1,017, select.

Philadelphia.AED 1,017 per passenger.Departing Wed, May 20, returning Mon, May 25.Round-trip flight with Delta.Outbound direct flight with Delta departing from Seattle / Tacoma International on Wed, May 20, arriving in Philadelphia International.Inbound direct flight with Delta departing from Philadelphia International on Mon, May 25, arriving in Seattle / Tacoma International.Price includes taxes and charges.From AED 1,017, select.

Find the cheapest month to fly from Seattle to Philadelphia

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle to Philadelphia flights are currently cheapest in May.

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Direct flights from Seattle to Philadelphia

Alternative Seattle to Philadelphia routes

Looking for the cheapest, fastest or easiest route from Seattle to Philadelphia? You could fly into the following airports instead.

Seattle to Philadelphia: Flight information

The things to know before you go.

Cheapest flight found	AED 496
Cheapest month to fly	May
Average flight time	5 hrs, 16 mins
Most popular airline	American Airlines
Average flights per week	260

Finding cheap flights from Seattle to Philadelphia: Frequently asked questions

How many airports are there in Philadelphia?

There are 6 airports in Philadelphia: Philadelphia International, Blue Bell, Philadelphia Trenton-Mercer, Greater Wilmington, Atlantic City International, and Allentown.

How much are round-trip flights from Seattle to Philadelphia?

The best price we found for a round-trip flight from Seattle to Philadelphia is AED 496. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.

How long does it take to fly from Seattle to Philadelphia?

5 hours and 16 minutes is the average flight time from Seattle to Philadelphia.

Which airlines fly direct from Seattle to Philadelphia?

American Airlines, British Airways and Alaska Airlines fly direct from Seattle to Philadelphia.

How many flights are there a week from Seattle to Philadelphia?

There are 585 flights per week flying from Seattle to Philadelphia, as of February 2026.

When is the cheapest time to fly from Seattle to Philadelphia?

The cheapest month to fly from Seattle to Philadelphia is usually May.

What's the cheapest airport to fly to in Philadelphia?

If you're flying from Seattle, the cheapest airport near Philadelphia is Philadelphia International – which is 11.2 km away from the center of Philadelphia. We've found flights to this airport from AED 496.

Which upcoming date is cheapest to fly from Seattle to Philadelphia on?

After crunching the numbers on our flight calendar, we found that it is currently cheapest to fly from Seattle to Philadelphia on Monday, May 4, 2026.

Can I get a direct flight from Seattle to Philadelphia?

Yes – the average flight time is 5 hours and 16 minutes.

How can I get the best flight deal from Seattle to Philadelphia?

We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Philadelphia but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

When is the best time to book flights to Philadelphia?

We crunched all the numbers in our flight calendar, and it looks like the cheapest time to book a flight to Philadelphia is around 40 days in advance, so don’t leave your flight to the last minute.

What’s the weather like in Philadelphia?

In February, the average temperature is usually around 0°C. July is typically the warmest month in Philadelphia, when it usually averages around 30°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging -5°C. The rainiest month is July.

Which is the cheapest airline to fly with from Seattle to Philadelphia?

The cheapest airline that flies to Philadelphia is Frontier Airlines, and the cheapest airline that flies to Blue Bell Airport is Alaska Airlines.

Flying from Seattle to Philadelphia: what you need to know

Kick off your travels at Seattle-Tacoma International Airport (SEA), the main airport in Seattle. Explore flights from Seattle to Philadelphia that leave from this base.
When it comes to touching down in Philadelphia, Philadelphia International Airport (PHL) is a primary hub. Another is Trenton-Mercer Airport (TTN).
The average time for a direct Seattle to Philadelphia flight is 5 hours 10 minutes.
Philadelphia is three hours ahead of Seattle and follows the UTC-4 timezone.
The busiest route for flights from Seattle to Philadelphia is from Seattle-Tacoma International Airport (SEA) to Philadelphia International Airport (PHL). Take your pick of 21 services every week between these two airports. If you'd like to set off at the first opportunity, the earliest flight from SEA to PHL is the 08:30 Alaska Airlines option. If you prefer traveling later, the last departure is at 23:52 with American Airlines.
Give yourself enough time to catch your Seattle to Philadelphia flight. Generally, it's best to arrive at least two hours before international departures and an hour ahead for domestic flights.
During popular months like July, you'll want to get to the airport well in advance. Plan to arrive two hours before domestic departures and four hours ahead for international flights when you fly during high season in general.

How to find the cheapest flights from Seattle to Philadelphia

Score cheap Seattle to Philadelphia flights by booking two months ahead. According to our research, that's the ideal time frame for finding a bargain.
May is the best month for scoring an incredible deal on a plane ticket from Seattle to Philadelphia. If you're looking to travel at a different time of year, the 'Whole month' tool will show you the lowest prices for every month.
Spend less time searching for cheap flights from Seattle to Philadelphia by creating a Price Alert. We'll send you an email or notification through the app when a special offer becomes available.
Tailor your flights using filters. Choose your ideal arrival and departure times, airlines and total journey duration. You can also sort your results by 'Fastest,' 'Best' or 'Cheapest' Seattle to Philadelphia flights.

Flying from Seattle

Seattle-Tacoma International Airport (SEA)

If you're searching for a direct flight from Seattle to Philadelphia, you can depart from Seattle-Tacoma International Airport (SEA). Get from SEA to Philadelphia International Airport (PHL) in one continuous trip.
Look out for promotions with Alaska Airlines. This carrier offers direct Seattle to Philadelphia plane tickets from SEA.
SEA is around 18 kilometers from central Seattle. If you're catching a cab, driving or ride-sharing from the center, it'll take you 20 minutes or so to get there, depending on the traffic. If you're using public transport, expect the journey time to be around 55 minutes.
Looking for a convenient hotel near Seattle-Tacoma International Airport? If you've booked an early flight from Seattle to Philadelphia, these accommodation options will have you sleeping moments from your departure gate:
Seattle-Tacoma International Airport scores top marks for on-time performance. 81.27% of flights that depart SEA arrive at their destination as scheduled.

Arriving in Philadelphia

Philadelphia International Airport (PHL)

Philadelphia International Airport (PHL) is approximately 11 kilometers from the center of Philadelphia. If you're catching a cab or a ride-share, the drive will take around 15 minutes.
Traveling to the center on public transport will take you around 45 minutes.
The last thing you want is a lengthy journey to your hotel if you're arriving on a late flight from Seattle to Philadelphia. Check in to one of these accommodation options near PHL instead:
Get on the fast track to adventure by picking up a Philadelphia International Airport rental car. Grab your wheels from Dollar, Thrifty or Budget and experience the lesser-explored corners of Philadelphia and beyond.
Reserving your vehicle from Philadelphia International Airport around three weeks ahead gives you the best chance of locking in a great deal.
The street address for PHL is 8500 Essington Ave.

Trenton-Mercer Airport (TTN)

As soon as your flight from Seattle to Philadelphia has touched down, you can get to the city center in about 40 minutes by car. Central Philadelphia is roughly 48 kilometers from Trenton-Mercer Airport (TTN).
You can expect the trip to take roughly 1 hour 45 minutes on public transport.
Forget about inconvenient public transport timetables or long cab lines. Pick up a Trenton-Mercer Airport rental car and take your trip in whatever direction you choose. Check out the availability and rates from Budget, National and Enterprise.
Snap up a deal by reserving your ride from TTN four weeks ahead of time. You'll also have access to a greater selection of vehicles.
Trenton-Mercer Airport can be found at Scotch Road, Terminal Building.

Best time to go to Philadelphia

February is the quietest month for flights from Seattle to Philadelphia, while August is the busiest. Choose the ideal time to visit Philadelphia based on whether you prefer a laid-back vibe or a lively atmosphere.
Lock in a Seattle to Philadelphia ticket departing in July if you want to explore the city during its warmest month. Expect temperatures in Philadelphia to range from 18ºC (64ºF) to 32ºC (90ºF).
If you'd rather travel in cooler conditions, look for a cheap flight from Seattle to Philadelphia in January when temperatures average between -7ºC (19ºF) and 9ºC (48ºF).

More about Philadelphia

When it comes to searching for somewhere to rest your head, you'll find the most popular stays in Philadelphia right here. Browse these hotels as soon as you've locked in your flight from Seattle to Philadelphia:
Liberty Bell and Independence Hall are a couple of top-rated attractions to add to your Philadelphia must-do list. Keep the sightseeing going at Philadelphia Museum of Art.

Explore more of United States

Philadelphia has plenty going for it, but there are so many other parts of United States just waiting to be discovered. About 129 kilometers north-east of Philadelphia, a trip to New York will keep your itinerary busy. Don't miss top attractions like Statue of Liberty, Central Park and Empire State Building.
Boston is another sought-after destination in United States and is around 434 kilometers north-east of Philadelphia. No trip is complete without dropping by Freedom Trail, Museum of Fine Arts Boston and Boston Tea Party Ships & Museum.