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$118+ 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 8/26. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
1 adult, Economy
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Cheap flight deals from Pennsylvania to Seattle

Keep the following information in mind while searching for Pennsylvania to Seattle flight deals. Data was last updated July 31, 2025.

Round-trip from

$217
(Delta)

One-way from

$118
(KAYAK)

Popular in

June

Cheapest in

March

Average price

$487

Good round-trip deal

$363 or less

Good one-way deal

$200 or less
From Pennsylvania to Seattle/Tacoma Intl
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One-way flight from Pennsylvania to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 10% potential increase in price ($49 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($8 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Price to beat on a round-trip flight from Pennsylvania to Seattle/Tacoma Intl.
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Price to beat on a one-way flight from Pennsylvania to Seattle/Tacoma Intl.
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Find 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 July 31, 2025.

This Southwest deal was found by Cheapflights users on 7/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/233:05 pmPIT - SEA
1 stop10h 25mSouthwest
Tue 8/266:45 amSEA - PIT
1 stop9h 10mSouthwest
Deal found 7/31$217
This Delta deal was found by Cheapflights users on 7/30. 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.
Tue 8/197:10 amPIT - SEA
1 stop7h 54mDelta
Mon 8/255:30 amSEA - PIT
1 stop8h 05mDelta
Deal found 7/30$224
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Tue 12/165:14 pmPIT - SEA
1 stop9h 01mAmerican Airlines
Thu 12/2511:45 amSEA - PIT
1 stop6h 32mAmerican Airlines
Deal found 7/30$226
This Alaska Airlines deal was found by Cheapflights users on 7/31. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/67:42 pmPIT - SEA
Nonstop5h 12mAlaska Airlines
Mon 9/1511:08 pmSEA - PIT
Nonstop4h 40mAlaska Airlines
Deal found 7/31$227
This TeaFlight deal was found by Cheapflights users on 7/31. 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 TeaFlight is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/94:59 pmJFK - SEA
1 stop9h 56mAlaska Airlines
Sat 12/137:55 amSEA - JFK
1 stop11h 05mAlaska Airlines
Deal found 7/31$244
This Trip.com deal was found by Cheapflights users on 7/31. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/47:00 pmJFK - SEA
Nonstop6h 20mJetBlue
Tue 9/911:59 pmSEA - JFK
Nonstop5h 21mJetBlue
Deal found 7/31$250
This lastminute.com deal was found by Cheapflights users on 7/29. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/235:06 pmDCA - SEA
Nonstop5h 50mHawaiian Airlines
Sat 8/308:00 amSEA - DCA
1 stop9h 59mHawaiian Airlines
Deal found 7/29$251
This CheapTickets deal was found by Cheapflights users on 7/30. 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 CheapTickets is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/136:09 pmIAD - SEA
Nonstop5h 47mHawaiian Airlines
Sat 9/204:20 pmSEA - IAD
Nonstop5h 03mHawaiian Airlines
Deal found 7/30$253
This Netflights deal was found by Cheapflights users on 7/30. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/137:00 amIAD - SEA
Nonstop5h 40mAlaska Airlines
Sat 9/2011:30 pmSEA - IAD
Nonstop5h 03mAlaska Airlines
Deal found 7/30$254
This Netflights deal was found by Cheapflights users on 7/30. 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 Netflights is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/138:00 amDCA - SEA
Nonstop5h 53mAlaska Airlines
Sat 9/208:35 amSEA - DCA
Nonstop5h 14mAlaska Airlines
Deal found 7/30$254
This American Airlines deal was found by Cheapflights users on 7/30. 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.
Sat 9/1311:30 amLGA - SEA
1 stop8h 59mAmerican Airlines
Sat 9/206:28 amSEA - LGA
1 stop9h 01mAmerican Airlines
Deal found 7/30$255
This Cheapflightsfares deal was found by Cheapflights users on 7/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/196:00 pmDCA - SEA
1 stop8h 01mFrontier
Tue 8/266:41 amSEA - DCA
1 stop7h 18mFrontier
Deal found 7/29$255

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 July 31, 2025.
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

Sat 8/23

3:05 pm-10:30 pm

1 stop10h 25m

Seattle/Tacoma Intl

Tue 8/26

6:45 am-6:55 pm

1 stop9h 10m

$217

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Tue 8/19

7:10 am-12:04 pm

1 stop7h 54m

Seattle/Tacoma Intl

Mon 8/25

5:30 am-4:35 pm

1 stop8h 05m

$224

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Tue 12/16

6:44 am-12:01 pm

1 stop8h 17m

Seattle/Tacoma Intl

Wed 12/24

1:37 am-1:37 pm

1 stop9h 00m

$226

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Sat 9/6

7:42 pm-9:54 pm

Nonstop5h 12m

Seattle/Tacoma Intl

Sun 9/7

11:08 pm-6:48 am

Nonstop4h 40m

$227

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Thu 8/21

7:42 pm-9:54 pm

Nonstop5h 12m

Seattle/Tacoma Intl

Mon 8/25

11:10 pm-6:48 am

Nonstop4h 38m

$237

New YorkSeattle

JFK - SEA

JFKSEA

New York John F Kennedy Intl

Thu 9/25

4:55 pm-8:16 pm

Nonstop6h 21m

Seattle/Tacoma Intl

Sat 10/4

3:45 pm-12:09 am

Nonstop5h 24m

$247

New YorkSeattle

JFK - SEA

JFKSEA

New York John F Kennedy Intl

Thu 9/4

7:00 pm-10:20 pm

Nonstop6h 20m

Seattle/Tacoma Intl

Tue 9/9

11:59 pm-8:20 am

Nonstop5h 21m

$250

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Sat 8/23

5:06 pm-7:56 pm

Nonstop5h 50m

Seattle/Tacoma Intl

Sat 8/30

8:00 am-8:59 pm

1 stop9h 59m

$251

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 9/13

6:09 pm-8:56 pm

Nonstop5h 47m

Seattle/Tacoma Intl

Sat 9/20

4:20 pm-12:23 am

Nonstop5h 03m

$253

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

Sat 9/13

7:00 am-9:40 am

Nonstop5h 40m

Seattle/Tacoma Intl

Sat 9/20

11:30 pm-7:33 am

Nonstop5h 03m

$254

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

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, January is the cheapest month in which you can book a flight from Pennsylvania to Seattle (average of $238). Flying from Pennsylvania to Seattle in June is currently the most expensive (average of $389). 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 July 31, 2025.

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 July 31, 2025.

The most flights from USPA to SEA are scheduled on a Thursday (12 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (8 on average).

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated July 31, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Southwest, and Delta from Pennsylvania to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Southwest
8.0
Very good
4,246 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Delta
8.0
Very good
7,981 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
Hawaiian Airlines
7.8
Good
2,611 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.
United Airlines
7.4
Good
8,900 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Overall

8.0

Boarding

8.1

Food

7.1

Entertainment

7.1

Comfort

7.8

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Anonymous,Jul 2025

EUG - SEA

Mobility support was fabulous No flight entertainment that I was aware of.

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, 38 users have taken a look at flights from Pennsylvania to Seattle/Tacoma Intl.

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

    $118 is the cheapest one-way deal found within the past few days, from Hawaiian Airlines. You may also be able to find cheap deals on United Airlines and Southwest, with prices starting from $119 and $120, respectively.

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

    When deciding which route to take from Pennsylvania to Seattle consider New York John F Kennedy Intl - Seattle/Tacoma Intl, Newark - 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 Finnair (81%), American Airlines (67%) and Air Tahiti Nui (67%).

  • What are the cheapest flights from Pennsylvania to Seattle?

    On average you can expect to pay $1,510 for a flight from Pennsylvania to Seattle. The cheapest flight overall is $138 while the most popular route, (New York John F Kennedy Intl - Seattle/Tacoma Intl) is currently priced at $231.

  • 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, January is the cheapest month in which you can book a flight from Pennsylvania to Seattle (average of $238). Flying from Pennsylvania to Seattle in June is currently the most expensive (average of $389). 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
SeaTac
Tukwila
Tacoma
Ocean Shores
Lakewood
Lynnwood
Lacey
Leavenworth
Renton
Olympia
Puyallup
Kent
Cle Elum
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline
Federal Way
Shelton

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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O'Hare Intl to Portland flights
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Nashville to Seattle flights
Oklahoma City to Seattle flights
Charlotte to Seattle flights
Milwaukee to Seattle flights
Burbank to Portland flights
Newark to Portland flights
Santa Ana to Portland flights
Midway to Seattle flights
Indianapolis to Seattle flights
Cleveland to Seattle flights
San Antonio to Seattle flights
Dulles Intl to Portland flights

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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$238FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$127Average$244FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$194Average$426FlexibilityNo cancel feeOn-time63%
DeltaCheapest$196Average$419FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$211Average$361FlexibilityNo cancel feeOn-time83%
American AirlinesCheapest$215Average$516FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$236Average$542FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$246Average$459FlexibilityNo cancel feeOn-time85%
Alaska AirlinesCheapest$256Average$538FlexibilityNo cancel feeOn-time75%

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