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Philadelphia International Airport to Seattle-Tacoma International Airport flight

Explore the cheapest one-way and round-trip flights from Philadelphia International Airport to Seattle-Tacoma International Airport over the next 90 days, with one-way fares from JPY 26,250 and round-trip from JPY 59,040. Based on Trip.com's latest 7-day flight data.

Displayed flight fares from Philadelphia to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight.News
A Wind Advisory remains in effect for Seattle from 6 PM this evening to 4 AM PST Sunday. Expect south winds of 15 to 25 mph with gusts up to 45 mph. Gusty winds will blow around unsecured objects, tree limbs could be blown down, and a few power outages may result.

Trip.com Price Insights: Flights from Philadelphia International Airport to Seattle-Tacoma International Airport

What is the cheapest month to fly from Philadelphia International Airport to Seattle-Tacoma International Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Philadelphia International Airport to Seattle-Tacoma International Airport for each month in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest one-way flights from Philadelphia International Airport to Seattle-Tacoma International Airport are usually in March, with an average price of JPY 26,640. It is best to avoid August, when the average price can reach JPY 71,500.

JPY 71,500
JPY 49,070
JPY 26,640
JPY 4,210
    Cheapest
  • JPY 41,090
    Nov
  • JPY 49,430
    Dec
  • JPY 29,190
    Jan
  • JPY 43,820
    Feb
  • JPY 26,640
    Mar
  • JPY 52,640
    Apr
  • JPY 43,190
    May
  • JPY 34,410
    Jun
  • JPY 41,290
    Jul
  • JPY 71,500
    Aug
  • JPY 47,110
    Sep
  • JPY 54,510
    Oct

What is the cheapest day of the week to fly from Philadelphia International Airport to Seattle-Tacoma International Airport?

The data is based on the past 12 months and shows the average ticket prices from Philadelphia International Airport to Seattle-Tacoma International Airport for each day of the week in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest departure day from Philadelphia International Airport to Seattle-Tacoma International Airport is Saturday, with average prices usually lower than other days. Avoid departing on Friday as prices are typically highest on that day.

JPY 50,370
JPY 42,010
JPY 33,650
JPY 25,290
    Cheapest
  • JPY 49,320
    Mon
  • JPY 43,370
    Tue
  • JPY 36,190
    Wed
  • JPY 44,670
    Thu
  • JPY 50,370
    Fri
  • JPY 33,650
    Sat
  • JPY 43,900
    Sun

Which airline offers the cheapest flights from Philadelphia International Airport to Seattle-Tacoma International Airport?

The cheapest airline flying from Philadelphia International Airport to Seattle-Tacoma International Airport is Frontier Airlines (from JPY 22,520) among 7 carriers operating this route. Based on Trip.com's latest 7-day flight data.

Frontier Airlines
From JPY 22,520
Delta Air Lines
From JPY 26,720
American Airlines
From JPY 27,650
Alaska Airlines
From JPY 28,810
United Airlines
From JPY 29,410
Hahn Air
From JPY 29,900
Sun Country Airlines
From JPY 33,700

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What is the flight schedule from Philadelphia International Airport to Seattle-Tacoma International Airport?

Check the schedule for flights from Philadelphia to Seattle and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule
  1. DL2092

    08:26

    PHL

    5h 58m

    11:24

    SEA

    S M T W T F S
    Search
  2. AS370

    07:02

    PHL

    6h 6m

    10:08

    SEA

    S M T W T F S
    Search
  3. AA2500

    18:35

    PHL

    6h 24m

    21:59

    SEA

    S M T W T F S
    Search
  4. AS443

    18:46

    PHL

    6h 10m

    21:56

    SEA

    S M T W T F S
    Search
  5. DL2829

    18:40

    PHL

    5h 7m

    Direct

    21:47

    SLC

    S - - W T - S
    Search
  6. DL2998

    22:45

    SLC

    2h 26m

    Direct

    00:11

    SEA

    S M T W T F S
  7. AA1850

    12:47

    PHL

    5h 19m

    Direct

    16:06

    PHX

    S M T W T F S
    Search
  8. AA2177

    18:28

    PHX

    3h 13m

    Direct

    20:41

    SEA

    S M T W T F S
  9. UA2661

    06:00

    PHL

    6h 22m

    Direct

    09:22

    SFO

    S - - W T F S
    Search
  10. UA2744

    12:22

    SFO

    2h 17m

    Direct

    14:39

    SEA

    S M T W T F S
  11. DL2270

    12:09

    PHL

    2h 17m

    Direct

    14:26

    ATL

    S M T W T F S
    Search
  12. DL714

    18:10

    ATL

    5h 36m

    Direct

    20:46

    SEA

    S M T W T F S
  13. F91147

    17:14

    PHL

    2h 40m

    Direct

    19:54

    ATL

    S M T W T F S
    Search
  14. F93923

    21:32

    ATL

    4h 36m

    Direct

    23:08

    LAS

    S M T W T F S
  15. F92407

    07:35

    LAS

    3h 3m

    Direct

    10:38

    SEA

    S - - W T - S
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About Philadelphia International Airport and Seattle-Tacoma International Airport

Learn about Philadelphia International Airport (PHL) and Seattle-Tacoma International Airport (SEA) — including location, terminals, transportation, and travel tips.

Flight distance 3,821.03km
Cheapest one-way ticket price JPY 26,250
Cheapest return ticket price JPY 56,220

FAQs for Philadelphia International Airport to Seattle-Tacoma International Airport Flights

  • How long is the flight from Philadelphia International Airport to Seattle-Tacoma International Airport?

    Philadelphia International Airport to Seattle-Tacoma International Airport takes about 5 hours 30 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 3 daily flights from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA).
  • The earliest flight from Philadelphia International Airport to Seattle-Tacoma International Airport departs at 07:00, and the last departs at 19:35, with about 8 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Philadelphia International Airport (PHL) to Seattle-Tacoma International Airport (SEA) is quite popular. Without considering departure times or holidays, tickets cost around JPY 64,120 in November, the most expensive month to book this route.
    • The distance from Seattle-Tacoma International Airport to downtown is about 17km, by taxi about 30 minutes.
  • American Airlines is a very popular airline operating an average of 812 flights per month.
  • One-way flights from Philadelphia International Airport to Seattle-Tacoma International Airport currently start from JPY 26,250, and round-trip fares start from JPY 56,220. The current lowest fare is a Delta Air Lines flight departing on Thu, Dec 3; prices may vary depending on availability.
  • Yes. Alaska Airlines, American Airlines and Delta Air Lines operate direct flights from Philadelphia International Airport to Seattle-Tacoma International Airport, with an average flight time of 5 hours 16 minutes, and around 30 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Philadelphia International Airport to Seattle-Tacoma International Airport is JPY 48,430. Prices may vary depending on the departure date, airline, and availability.
  • Philadelphia International Airport to Seattle-Tacoma International Airport operates around 32 weekly flights, mainly by Alaska Airlines, American Airlines and Delta Air Lines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Philadelphia International Airport and Seattle-Tacoma International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

Note: Prices shown on this page are the estimated lowest prices and include all taxes and fees found in the last 24 hours.

Book with no extra fees

Prices displayed on this page are all-inclusive (including taxes, fuel surcharges, civil aviation development fund, etc.), with all fees confirmed before payment. Fees for luggage, meals, Wi-Fi, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page have been updated within the last 24 hours—sometimes even in real time. The more popular the route, the more accurate the data.

Change & Cancellation Policy

Trip.com shows the cancellation and change policies for each flight ticket during the booking process, including any fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply according to the airline's ticket policy.
Cancellation/change due to a flight schedule change:
If the flight schedule has changed and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please visit the customer support pages.