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Flights from Philadelphia to Seattle Starting at CNY 123

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Return
      • PHL20:40
        23h 18m
        1 stop
        SEA16:58
        Tue, Apr 30|Philadelphia - Seattle|Frontier Airlines
        CNY 123CNY 186
        34% OFF
        34% OFF
        CNY 186CNY 123
      • PHL20:40
        23h 18m
        1 stop
        SEA16:58
        Tue, May 7|Philadelphia - Seattle|Frontier Airlines
        CNY 124CNY 186
        33% OFF
        33% OFF
        CNY 186CNY 124
      • PHL21:24
        14h 10m
        1 stop
        SEA08:34
        Sat, Apr 27|Philadelphia - Seattle|Frontier Airlines
        CNY 125CNY 186
        33% OFF
        33% OFF
        CNY 186CNY 125
      • PHL22:59
        12h 35m
        1 stop
        SEA08:34
        Tue, Apr 23|Philadelphia - Seattle|Frontier Airlines
        CNY 129
        CNY 129
      • PHL20:27
        13h 37m
        1 stop
        SEA07:04
        Sat, May 18|Philadelphia - Seattle|Frontier Airlines
        CNY 130
        CNY 130
      • PHL18:57
        5h 58m
        Direct
        SEA21:55
        Mon, Apr 29|Philadelphia - Seattle|Alaska Airlines
        CNY 131
        CNY 131
      • PHL18:57
        5h 58m
        Direct
        SEA21:55
        Tue, Apr 30|Philadelphia - Seattle|Alaska Airlines
        CNY 131
        CNY 131
      • PHL06:00
        20h 55m
        1 stop
        SEA23:55
        Tue, May 21|Philadelphia - Seattle|Frontier Airlines
        CNY 132
        CNY 132
      • PHL20:27
        27h 24m
        1 stop
        SEA20:51
        Tue, Jun 4|Philadelphia - Seattle|Frontier Airlines
        CNY 136
        CNY 136
      • PHL20:50
        26h 45m
        1 stop
        SEA20:35
        Mon, Apr 22|Philadelphia - Seattle|Frontier Airlines
        CNY 142
        CNY 142
      • PHL13:00
        3h 5m
        Direct
        SEA14:00
        Fri, Apr 26|Philadelphia - Seattle|Frontier Airlines
        Find More Flights
        Find More Flights

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from Philadelphia to Seattle

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Philadelphia to Seattle

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From AU$ 123
Alaska Airlines
From AU$ 131
Sun Country Airlines
From AU$ 148
Spirit Airlines
From AU$ 158
Delta Air Lines
From AU$ 179
American Airlines
From AU$ 181
United Airlines
From AU$ 221
Southwest Airlines
From AU$ 230
Jetblue Airways
From AU$ 248
ANA airlines

Find more flights and airlines

Alternative Routes from Philadelphia to Seattle

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Philadelphia to Seattle.

  • Cheapest
    Frontier Airlines
    PHL
    20:40
    23h 18m
    1 transfer
    SEA
    16:58
    Philadelphia International Airport - Seattle-Tacoma International Airport
    Tue, Apr 30Frontier Airlines
    AU$ 123
  • Frontier Airlines
    TTN
    20:24
    28h 11m
    2 transfer
    SEA
    21:35
    Trenton Mercer Airport - Seattle-Tacoma International Airport
    Mon, Apr 29Frontier Airlines
    AU$ 178
  • Frontier Airlines
    TTN
    20:24
    28h 11m
    2 transfer
    SEA
    21:35
    Trenton Mercer Airport - Seattle-Tacoma International Airport
    Mon, Apr 29Frontier Airlines
    AU$ 178
    Find More Flights

How do I find the cheapest flights?

  • When are flight from Philadelphia (PHL) to Seattle (SEA) the cheapest?

    Airlines adjust prices for flights from Philadelphia to Seattle based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the lowest flight prices on Tuesdays, Wednesdays, and Saturdays.

  • How much are flights from Philadelphia (PHL) to Seattle (SEA) cost?

    According to Trip.com's data, the lowest price is around AU$ 633.

  • How long is the flights from Philadelphia (PHL) to Seattle (SEA)?

    It takes about 6 hours 8 minutes to fly from Philadelphia (PHL) to Seattle (SEA).

  • What is the transportation method from the main airport to downtown in Seattle?

    • The distance from Seattle-Tacoma International Airport to downtown is about 17km, by taxi about 30 minutes.

  • What time does the earliest flight from Philadelphia to Seattle depart?

    The earliest flight departs from Philadelphia (PHL) at 07:15 and arrives in Seattle (SEA) at 10:14.

  • What time does the latest flight from Philadelphia to Seattle depart?

    The latest flight departs from Philadelphia (PHL) at 18:50 and arrives in Seattle (SEA) at 21:52.

  • What are the most popular airlines that fly from Philadelphia (PHL) to Seattle (SEA)?

    Airlines with flights from Philadelphia (PHL) to Seattle (SEA): Qatar Airways, American Airlines, Alaska Airlines, British Airways and Air Tahiti Nui.

  • What's the most popular airline for direct flights from Philadelphia (PHL) to Seattle (SEA)?

    Alaska Airlines operates 2 direct flights from Philadelphia (PHL) to Seattle (SEA).

  • How many airports in Seattle (SEA)?

How to find a cheap flight from Philadelphia to Seattle

Wait until the last minute and flight costs are often sky-high. Plan ahead, book the right way, and your savings can soar. We have loads of saving tips to help you find a cheap flight from Philadelphia to Seattle. Book your flights at the right time and save more.
1
Book Early
Once prices are gone, they're gone. Lock in deals while you can!
2
Compare Flight Prices
Compare prices on travel agency and airline websites.
3
Look Out for Deals
Check airline and travel agency websites for latest flight deals
4
Check One-way Fares
Buying two cheap one-way flights can sometimes be a better deal than a round-trip.
5
Try Different Dates
Flying during the week, early in the morning, or late at night can help save money.
6
Use the Trip.com App
Save up to £10 per person when booking your flights on Trip.com

Flight Information from Philadelphia to Seattle

Cheapest direct flight price

AU$ 122

Cheapest return ticket price

AU$ 264

Off-season for travel

December

Peak season for travel

July

Flight distance

3,816.94km

Average flight time

6 hours 8 minutes

Popular airline

American Airlines

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