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$90+ Cheap flights from Pennsylvania to Seattle (SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Feb 27 — Mar 61
Fri 2/27
Fri 3/6
1 adult, Economy
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Cheap flight deals from Pennsylvania to Seattle

Cheapest flights from Pennsylvania to Seattle
Explore the most affordable flight options available from Pennsylvania to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 28, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:31 pm
PIT
-
SEA
Nonstop5h 33m
Hawaiian Airlines
Wed 2/2511:02 am
SEA
-
PIT
Nonstop4h 33m
Hawaiian Airlines
Deal found 1/27$176
This CheapOair deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/257:17 pm
PIT
-
SEA
Nonstop5h 18m
Alaska Airlines
Tue 5/510:30 am
SEA
-
PIT
Nonstop4h 51m
Alaska Airlines
Deal found 1/27$177
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:09 pm
PIT
-
SEA
1 stop8h 15m
American Airlines
Thu 3/51:37 pm
SEA
-
PIT
1 stop6h 41m
American Airlines
Deal found 1/27$179
This American Airlines deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/197:09 pm
PIT
-
SEA
1 stop8h 15m
American Airlines
Wed 2/251:37 pm
SEA
-
PIT
1 stop8h 09m
American Airlines
Deal found 1/27$180
This CheapOair deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/257:31 pm
PIT
-
SEA
Nonstop5h 33m
Alaska Airlines
Thu 3/511:02 am
SEA
-
PIT
Nonstop4h 33m
Alaska Airlines
Deal found 1/26$187
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/42:00 pm
DCA
-
SEA
2 stops21h 13m
Frontier
Mon 3/912:24 pm
SEA
-
DCA
1 stop21h 38m
Frontier
Deal found 1/27$189
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 pm
DCA
-
SEA
1 stop21h 01m
Frontier
Tue 3/1010:08 pm
SEA
-
DCA
2 stops20h 51m
Frontier
Deal found 1/27$191
This American Airlines deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/277:09 pm
PIT
-
SEA
1 stop8h 15m
American Airlines
Sat 2/2812:07 am
SEA
-
PIT
1 stop8h 03m
American Airlines
Deal found 1/26$193
This Kiwi.com deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 3/52:00 pm
DCA
-
SEA
1 stop24h 19m
Frontier
Mon 3/912:24 pm
SEA
-
DCA
1 stop21h 38m
Frontier
Deal found 1/26$194
This CheapOair deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/142:00 pm
DCA
-
SEA
1 stop23h 55m
Frontier
Sat 2/211:16 pm
SEA
-
DCA
1 stop20h 59m
Frontier
Deal found 1/27$196
This Delta deal was found by Cheapflights users on 1/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/45:30 pm
PIT
-
SEA
1 stop9h 29m
Delta
Sat 5/95:45 am
SEA
-
PIT
1 stop8h 02m
Delta
Deal found 1/25$197
This Kiwi.com deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/276:00 pm
DCA
-
SEA
1 stop21h 01m
Frontier
Mon 3/29:14 pm
SEA
-
DCA
2 stops21h 45m
Frontier
Deal found 1/27$197

Find flight deals from Pennsylvania to Seattle

Keep the following information in mind while searching for Pennsylvania to Seattle flight deals. Data was last updated January 28, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$176
(Kiwi.com)

One-way from

$90
(American Airlines)

Popular in

June

Cheapest in

October

Average price

$356

Good round-trip deal

$294 or less

Good one-way deal

$208 or less
Provider with most accurate pricing for Philadelphia-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Philadelphia-Seattle/Tacoma Intl flights.
Search Deals
From Pennsylvania to Seattle/Tacoma Intl
Search Deals
One-way flight from Pennsylvania to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($63 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($10 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals
Price to beat on a round-trip flight from Pennsylvania to Seattle/Tacoma Intl.
Search Deals
Price to beat on a one-way flight from Pennsylvania to Seattle/Tacoma Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Pennsylvania to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
Use the filters below to find and compare flights from Pennsylvania to Seattle that are best for you.

Fly from

Pennsylvania

Fly to

Seattle

Route

Depart

Return

Price

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Thu 5/7

7:15 pm-11:26 pm

1 stop7h 11m

Seattle/Tacoma Intl

Mon 5/11

9:20 pm-9:09 am

1 stop8h 49m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Fri 2/20

7:31 pm-10:04 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Fri 2/27

11:02 am-6:35 pm

Nonstop4h 33m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Mon 5/4

5:30 pm-11:59 pm

1 stop9h 29m

Seattle/Tacoma Intl

Mon 5/11

11:59 pm-10:04 am

1 stop7h 05m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Fri 5/8

4:50 pm-11:26 pm

1 stop9h 36m

Seattle/Tacoma Intl

Tue 5/12

11:05 pm-9:35 am

1 stop7h 30m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Mon 5/4

5:30 pm-11:59 pm

1 stop9h 29m

Seattle/Tacoma Intl

Tue 5/12

9:20 pm-9:09 am

1 stop8h 49m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Tue 5/5

3:55 pm-9:49 pm

1 stop8h 54m

Seattle/Tacoma Intl

Sat 5/9

5:45 am-4:47 pm

1 stop8h 02m

$197

NewarkSeattle

EWR - SEA

EWRSEA

Newark

Thu 3/19

7:29 pm-10:53 pm

Nonstop6h 24m

Seattle/Tacoma Intl

Mon 3/23

11:59 pm-8:08 am

Nonstop5h 09m

$219

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Wed 3/4

5:50 am-1:15 pm

1 stop10h 25m

Seattle/Tacoma Intl

Sun 3/8

7:20 am-12:45 am

1 stop14h 25m

$224

NewarkSeattle

EWR - SEA

EWRSEA

Newark

Wed 2/25

8:28 pm-11:51 pm

Nonstop6h 23m

Seattle/Tacoma Intl

Wed 3/4

11:59 pm-10:17 am

1 stop7h 18m

$227

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Sat 7/4

5:35 pm-10:05 pm

1 stop7h 30m

Seattle/Tacoma Intl

Wed 7/15

5:45 am-4:47 pm

1 stop8h 02m

$228

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 60 results
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Best time to book a flight from Pennsylvania to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Pennsylvania with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Pennsylvania to Seattle

What is the cheapest month to book a flight from Pennsylvania to Seattle?

Currently, February is the cheapest month in which you can book a flight from Pennsylvania to Seattle (average of $167). Flying from Pennsylvania to Seattle in June is currently the most expensive (average of $246). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from PA to SEA?

Find hourly flight availability from Pennsylvania to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 28, 2026.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Pennsylvania to Seattle as you normally would.

Weekly flight availability from Pennsylvania to Seattle

Explore weekly flight availability from Pennsylvania to Seattle. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated January 28, 2026.

The most flights from USPA to SEA are scheduled on a Monday (6 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).

Related info for your journey

Find useful and relevant information for your journey from Pennsylvania to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Seattle from Pennsylvania?

    Seattle/Tacoma Intl (SEA) is the airport you will fly into if you book a flight from Pennsylvania to Seattle. It is only a 11.4 mi journey from Seattle/Tacoma Intl (SEA) to Seattle’s city center.

  • How popular is this Pennsylvania to Seattle flight route?

    Within the past month, 37 users have taken a look at flights from Pennsylvania to Seattle/Tacoma Intl.

  • How long is the flight from Pennsylvania to Seattle?

    Departing from Pennsylvania to Seattle will take you 5h 33m. Pennsylvania and Seattle are separated by a distance of 2117 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from Pennsylvania to Seattle one-way?

    $85 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on American Airlines and Spirit Airlines, with prices starting from $89 and $91, respectively.

  • What are the most popular routes from Pennsylvania to Seattle?

    When deciding which route to take from Pennsylvania to Seattle consider Newark - Seattle/Tacoma Intl, Washington, D.C. Dulles Intl - Seattle/Tacoma Intl or Washington, D.C. Reagan-National - Seattle/Tacoma Intl as they are the most popular.

  • What are the most reliable airlines from Pennsylvania to Seattle?

    The top 3 most reliable airlines when flying from Pennsylvania to Seattle are American Airlines (65%), Qatar Airways (65%) and Alaska Airlines (61%).

  • What are the cheapest flights from Pennsylvania to Seattle?

    On average you can expect to pay $904 for a flight from Pennsylvania to Seattle. The cheapest flight overall is $138 while the most popular route, (Newark - Seattle/Tacoma Intl) is currently priced at $217.

  • Can I find deals for flights from Pennsylvania to Seattle that include hotel bookings?

    Yes. In addition to deals on Pennsylvania to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Pennsylvania to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Pennsylvania to Seattle.

  • Can I find deals for business class flights from Pennsylvania to Seattle?

    Yes. Cheapflights offers flight deals from Pennsylvania to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Pennsylvania to Seattle?

    Currently, February is the cheapest month in which you can book a flight from Pennsylvania to Seattle (average of $167). Flying from Pennsylvania to Seattle in June is currently the most expensive (average of $246). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Renton
Puyallup
Kirkland
Kent
Tukwila
Fife
Aberdeen
Shoreline
Marysville
Centralia
Federal Way
Chehalis

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Pennsylvania to Seattle

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Pennsylvania to Seattle

Discover the top 9 airlines that operate flights from Pennsylvania to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 28, 2026.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$225FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$106Average$223FlexibilityNo cancel feeOn-time65%
DeltaCheapest$149Average$357FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$157Average$411FlexibilityNo cancel feeOn-time63%
Hawaiian AirlinesCheapest$173Average$433FlexibilityNo cancel feeOn-time85%
American AirlinesCheapest$178Average$500FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$211Average$335FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$221Average$470FlexibilityNo cancel feeOn-time69%
Alaska AirlinesCheapest$232Average$489FlexibilityNo cancel feeOn-time75%

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