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PHL - SEA

Find cheap flights from Philadelphia to Seattle

1 adult
0 bags
Sat 1/6
Sat 8/6

Search hundreds of travel sites at once for deals on flights to Seattle

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Seattle, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Philadelphia to Seattle, as well as popular online travel agencies
In the last 7 days, travellers have searched 43,740,974 times on KAYAK, and here is why:

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Flights from Philadelphia to Seattle - Travel Insights & Trends

Get data-powered insights and trends into flights from Philadelphia to Seattle to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Philadelphia to Seattle?

The average price of all flights from Philadelphia to Seattle clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Seattle on a Monday, as we generally find the cheapest rates on that day for this route. On the other hand, Saturday is the most expensive day to fly from Philadelphia to Seattle. For your return ticket, we recommend flying on a Sunday and avoiding Mondays for the best deals.

What is the cheapest month to fly from Philadelphia to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Philadelphia to Seattle, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from Philadelphia to Seattle is October, where tickets cost C$ 418 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is C$ 856 and C$ 848 respectively.

How far in advance should I book a flight from Philadelphia to Seattle?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Philadelphia to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Philadelphia to Seattle, you should book around 2 weeks before departure. For the absolute cheapest price, our data suggests you should book 63 days before departure.

Which airlines fly direct between Philadelphia and Seattle?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from Philadelphia to Seattle.
There are 2 airlines that fly direct from Philadelphia to Seattle. They are Alaska Airlines and American Airlines. The cheapest airline for this route is Alaska Airlines, with the best deal found costing C$ 272. On average, the best prices for this route can be found at American Airlines.

How many flights are there between Philadelphia and Seattle per day?

Each day, there are between 3 and 4 nonstop flights that take off from Philadelphia and land in Seattle, with an average flight time of 5h 57m. The most common departure time is 6:00 p.m. and most flights take off in the evening. Each week, there are 23 flights. The most frequent day of departure is Tuesday, when 17% of all weekly flights depart. The fewest flights depart on a Saturday.

Which cabin class options are there for flights between Philadelphia and Seattle?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There is only one cabin class option available for the route, which is Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

What’s the earliest departure time from Philadelphia to Seattle?

Early birds can take the earliest flight from Philadelphia at 7:00 am and will be landing in Seattle at 9:51 am.

What’s the latest departure time from Philadelphia to Seattle?

If you prefer to fly at night, the latest flight from Philadelphia to Seattle jets off at 7:16 pm and lands at 10:29 pm.

Good to know

Low season

February

High season

August
Best time to beat the crowds (15% less expensive on average)
Most popular time to fly (14% more expensive on average)

When to book flights from Philadelphia to Seattle

Are your dates flexible? Find out the best times to travel from Philadelphia to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Philadelphia to Seattle

  • What are some of the top hotels that are located close to the Seattle-Tacoma International Airport?

    If you are searching for a hotel near Seattle-Tacoma-Intl-(SEA), you may want to have a look at the Hampton Inn & Suites Seattle-Airport and La Quinta by Wyndham Seattle Sea-Tac Airport. All of them have a good connection to the airport in case your flight arrives late.

  • What transportation options are there for accessing the Philadelphia International Airport?

    The Regional Rail's Airport Line Service is the most convenient way to get to Philadelphia International Airport from the city center. This service makes stops at all of the main airport terminals, in addition to University City, Center City, and the area close to Temple University. Access is provided to every station that is serviced by the Airport Line.

  • What services are available for passengers with reduced mobility?

    You may book special help to go through security and reach your gate in advance at PHL airport. The airport has accessible facilities as well as additional assistance for those with a concealed disability. Seattle-Tacoma International Airport (SEA) provides accessible services at the arrival airport such as wheelchairs and adapted bathrooms.

  • Where can I find family restrooms at Seattle-Tacoma International Airport?

    Family bathrooms are conveniently located next to all multi-user toilet facilities and are open for use by any and all customers. These restrooms can be found on the floors of the Main Terminal that are designated for Ticketing and Baggage Claim, as well as on the levels that are designated for Concourses A, B, C, and D, and in both the North and South Satellites. In addition, these restrooms can be found on the levels that are designated for Concourses A, B, C, and D. In the family restrooms of the North Satellite, there are two adult-sized changing tables. You may get step-by-step instructions by using the airport's interactive map.

  • Which airlines offer Wi-Fi service onboard planes from Philadelphia to Seattle?

    Alaska Airlines, American Airlines, Air Canada, Delta, and JetBlue offer inflight Wi-Fi service on the Philadelphia to Seattle flight route.

  • Which aircraft models fly most regularly from Philadelphia to Seattle?

    The Boeing 737-900 Passenger/BBJ3 (winglets) is the aircraft model that flies most regularly on the Philadelphia to Seattle flight route.

  • Which airline alliances offer flights from Philadelphia to Seattle?

    oneworld is the only airline alliance operating flights between Philadelphia and Seattle.

  • On which days can I fly direct from Philadelphia to Seattle?

    There are direct flights from Philadelphia to Seattle on a daily basis.

  • How does KAYAK find such low prices on flights from Philadelphia to Seattle?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Philadelphia to Seattle.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Philadelphia to Seattle?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Philadelphia is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Philadelphia to Seattle?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Seattle with an airline and back to Philadelphia with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Philadelphia to Seattle?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Seattle from Philadelphia up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding a cheap flight from Philadelphia to Seattle

  • Looking for a cheap flight? 25% of our users found flights on this route for C$ 290 or less one-way.
  • Make use of the lounges that are offered at both the airport where you are departing and the airport where you are arriving. At Philadelphia International Airport (PHL), there are a number of United Club Lounges, and at Seattle-Tacoma International Airport (SEA), there are a number of United Club Lounges, both of which provide amenities such as meals and showers.
  • When traveling through Philadelphia International Airport, nursing mothers now have a new alternative available to them if they want their privacy: a nursing pod. In the room, not only will you have complete privacy, but there will also be a bench and a table that folds out from under the seat, in addition to an electrical outlet.
  • If you require parking near the airport, there are a number of private lots in close proximity to PHL that provide both short-term and long-term parking options. The operators provide users with transportation to and from the airport as part of their service.
  • If you are traveling with your family, SkySquad provides professional, pre-screened personal assistants for hire to assist with PHL airport navigation from the moment you arrive until you board the airplane. This fee-based program offers assistance to travelers of all ages, from infants to those older than 100.
  • If you need to exchange money, you may do so at the Travelex Currency Exchange and ATMs, which are situated in the Main Terminal, near the south end of the Ticketing Level, at the Baggage Claim, on Concourse A, and in the South Satellite at Seattle-Tacoma International Airport.
See more tips

Prefer to fly non-stop from Philadelphia to Seattle?

Find which airlines fly direct from Philadelphia to Seattle/Tacoma Intl, which days they fly and book direct flights.

Nonstop departures

Philadelphia to Seattle/Tacoma Intl

Monday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Tuesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Wednesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Thursday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Friday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

Saturday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Sunday

Air Tahiti Nui, Alaska Airlines, American Airlines, +2 more

Air Tahiti Nui, Alaska Airlines, +3 more

See more nonstop flights

Nonstop returns

Seattle/Tacoma Intl to Philadelphia

Monday

Air Tahiti Nui, Alaska Airlines, American Airlines

Air Tahiti Nui, Alaska Airlines, +1 more

Tuesday

Air Tahiti Nui, Alaska Airlines, American Airlines, +1 more

Air Tahiti Nui, Alaska Airlines, +2 more

Wednesday

Air Tahiti Nui, Alaska Airlines, American Airlines

Air Tahiti Nui, Alaska Airlines, +1 more

Thursday

Air Tahiti Nui, Alaska Airlines, American Airlines, +3 more

Air Tahiti Nui, Alaska Airlines, +4 more

Friday

Air Tahiti Nui, Alaska Airlines, American Airlines

Air Tahiti Nui, Alaska Airlines, +1 more

Saturday

Air Tahiti Nui, Alaska Airlines, American Airlines, +1 more

Air Tahiti Nui, Alaska Airlines, +2 more

Sunday

Air Tahiti Nui, Alaska Airlines, American Airlines

Air Tahiti Nui, Alaska Airlines, +1 more

See more nonstop flights
See more nonstop flights

Top airlines flying from Philadelphia to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Philadelphia to Seattle. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Philadelphia to Seattle? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
Alaska AirlinesOverall score based on 9123 reviews
7.9Comfort
7.3Entertainment
8.6Crew
8.2Boarding
7.3Food
Airline reviews

Was not happy that we had to wait an additional 50 minutes for passengers that were still in TSA. This delay made us miss our connecting flight in Seattle to get home to tuck in our two little toddlers. We ran off the plane and ran across the entire airport trying to make this flight only to get to the gate to see that they have ended boarding. So they were willing to wait for passengers in Hawaii but not Seattle?? Especially when this wasn't even our fault. I expect to receive miles for missing our flight and spending an additional 4 hours in Seattle.

2.0 MediocreAnonymous, May 2024HNL - SEA
Read more about Alaska Airlines reviews

Was not happy that we had to wait an additional 50 minutes for passengers that were still in TSA. This delay made us miss our connecting flight in Seattle to get home to tuck in our two little toddlers. We ran off the plane and ran across the entire airport trying to make this flight only to get to the gate to see that they have ended boarding. So they were willing to wait for passengers in Hawaii but not Seattle?? Especially when this wasn't even our fault. I expect to receive miles for missing our flight and spending an additional 4 hours in Seattle.

Better organizing of entry and exit onto the plane regarding all of the baggage people haul on. There should be a better system so those with no baggage can get in and out more quickly. The baggage haul-on situation is absurd.

It was a great experience, although our seat was taken and we did not want to be rude and ask the person to move. Flight Attendants need to make sure that people should be in their assign sitting that are paid for. Other then that, we had a great flying experience with Alaska Airlines.

Too many people with oversized carry-ons. Uncomfortable seats. flight was too crowded.

Assigned last seat in row Did not recline at all Alaska Air seemed to have more leg room than my last few flights on United Yay!

The WIFI didn't work well enough to get through even 5 minutes of a movie I had selected (it just kept pausing and spinning), and I just gave up and read a book. The selection of movies was a little sparse though, so reading wasn't that bad of an option. This was an older 737-800, with undersized overhead bins -- but it doesn't make sense to me that we are told to slide our bags in with the wheels facing us (most people ignore that and put the handles facing us). This makes it more difficult to remove the bags (no handle). The flight went well, and the fruit/cheese platter I pre-ordered was good -- although it is a little annoying to have to pre-order for this (but I suppose it saves time). When I pre-order it automatically gets charged to my personal credit card (Alaska VISA), when I'd prefer to use my corporate card for that on business trips.

It was our baby’s first flight and everything went perfect. The flight attendant gave him his first set of wings and we were smooth flying from there.

My flight went off without any hitch or issue. I anticipate issues every time I fly, luckily, I was wrong on this trip.

It was much better than expected. Short flight and smaller plane so no entertainment or food.

It took around two hours to depart. Just sitting in the tamarack waiting. It impacted my traveling plans in a very dramatic way. When we returned, it took around two hours for us to be able to get our luggage. Ridiculous!!

Not being able to purchase my check in baggage online was a negative.

LATE LATE LATE!!! Plagued by late AA flights on this trip. Such a drag. This one was by far the worst.

i suspect i caught flu on this flight as i could hear someone coughing a few rows back and ended up with flu a few days later. also tiresome to have to watch movies on my device by holding up smartphone screen, would have liked to have in seat display.

Same basket of unhealthy prepackaged snacks (junk food) which was depleted by the time it got to my row!!

I had trouble finding a boarding pass because I had an hour between Flights and American did not see my flight I believe because I was ticketed through KAYAK. I did not have enough time to go to the desk before boarding so I went to the desk and told them while I was boarding and they had a boarding pass for me within three minutes. Nice. I paid extra to have more legroom and it is definitely worth it for a six hour flight. I would’ve paid for a decent dinner, but they didn’t offer anything but a snack box —not good for six hours.

We experience delays on departure and connecting flights resulting in 14 hour to our next departure. We were accommodated with a night's stay but was only provided a 12 dollar meals accommodation. The airlines rules state.at least 50 dollars. In any case, it can not make up for the whole day missed on our vacation in Sydney Australia.

Flight from PHL to PHX arrived 50 minutes early and a gate was available. First class flight attendant Stephanie was very friendly and polite. Sanitizing wipes should be provided with meals in addition to refresher towels.

flight delayed so missed connection and this had to rebook for next day

Flight departed PHL one hour late due to late arrival of aircraft. On board services were okay. First class menu does not offer any new items; same desserts (cheese & crackers or Mango sorbet). At least there were no credit card promotions during the flight.

After sitting on plane for 7+ hours, flight was canceled. And to makes matters worse, my suitcase is in baggage hell!

Philadelphia - Seattle Flights

Departure:

Philadelphia (PHL)United States

Destination:

Seattle (SEA)United States

Return flight deals:

Seattle - Philadelphia

Cabin classes:

C$ 596

Browse origins:

  • Flights » 
  • Philadelphia

Browse destinations:

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  • Worldwide » 
  • Seattle