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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 12/17. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
Nov 16 — Nov 231
Sun 11/16
Sun 11/23
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 October 17, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$179
(Southwest)

One-way from

$90
(American Airlines)

Popular in

June

Cheapest in

October

Average price

$347

Good round-trip deal

$285 or less

Good one-way deal

$158 or less
Provider with most accurate pricing for Philadelphia-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Philadelphia-Seattle/Tacoma Intl flights.
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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 ($50 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 17, 2025.

This Southwest deal was found by Cheapflights users on 10/15. 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.
Fri 11/78:05 pmPIT - SEA
1 stop7h 30mSouthwest
Sun 11/95:35 amSEA - PIT
1 stop6h 25mSouthwest
Deal found 10/15$179
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/67:22 pmPIT - SEA
1 stop8h 36mAmerican Airlines
Wed 11/126:19 amSEA - PIT
1 stop8h 07mAmerican Airlines
Deal found 10/16$181
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 11/67:28 pmPIT - SEA
Nonstop5h 39mHawaiian Airlines
Wed 11/1210:54 amSEA - PIT
Nonstop4h 38mHawaiian Airlines
Deal found 10/15$186
This Alaska Airlines deal was found by Cheapflights users on 10/15. 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.
Thu 11/137:28 pmPIT - SEA
Nonstop5h 39mAlaska Airlines
Tue 11/1810:54 amSEA - PIT
Nonstop4h 38mAlaska Airlines
Deal found 10/15$187
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 10/294:00 pmJFK - SEA
1 stop23h 13mFrontier
Tue 11/41:37 pmSEA - JFK
2 stops19h 22mFrontier
Deal found 10/15$192
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 10/2910:00 pmLGA - SEA
2 stops17h 13mFrontier
Sat 11/112:58 pmSEA - LGA
1 stop31h 02mFrontier
Deal found 10/15$193
This American Airlines deal was found by Cheapflights users on 10/16. 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.
Mon 12/86:39 pmPIT - SEA
1 stop7h 46mAmerican Airlines
Wed 12/1012:31 amSEA - PIT
1 stop7h 08mAmerican Airlines
Deal found 10/16$194
This Kiwi.com deal was found by Cheapflights users on 10/14. 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.
Tue 11/410:50 pmLGA - SEA
1 stop16h 17mMultiple Airlines
Thu 11/61:08 pmSEA - LGA
2 stops30h 34mMultiple Airlines
Deal found 10/14$194
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/116:00 amPIT - SEA
1 stop8h 40mAmerican Airlines
Wed 11/1212:59 amSEA - PIT
1 stop7h 52mAmerican Airlines
Deal found 10/16$195
This American Airlines deal was found by Cheapflights users on 10/15. 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 10/305:00 amEWR - SEA
1 stop9h 30mAmerican Airlines
Fri 10/3112:34 amSEA - EWR
1 stop7h 26mAmerican Airlines
Deal found 10/15$197
This Kiwi.com deal was found by Cheapflights users on 10/15. 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 10/307:59 amJFK - SEA
1 stop13h 33mFrontier
Sun 11/211:43 amSEA - JFK
1 stop15h 47mFrontier
Deal found 10/15$197
This Delta deal was found by Cheapflights users on 10/16. 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.
Wed 12/35:30 pmPIT - SEA
1 stop8h 55mDelta
Sun 12/711:15 pmSEA - PIT
1 stop7h 31mDelta
Deal found 10/16$197

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 October 17, 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

Wed 11/5

6:20 pm-10:55 pm

1 stop7h 35m

Seattle/Tacoma Intl

Wed 11/12

5:15 am-4:50 pm

1 stop8h 35m

$179

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Fri 12/5

6:00 am-10:54 am

1 stop7h 54m

Seattle/Tacoma Intl

Tue 12/9

2:03 pm-12:19 am

1 stop7h 16m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Mon 1/5

7:54 pm-10:18 pm

Nonstop5h 24m

Seattle/Tacoma Intl

Mon 1/12

11:10 am-6:46 pm

Nonstop4h 36m

$197

New YorkSeattle

LGA - SEA

LGASEA

New York LaGuardia

Fri 10/24

2:40 pm-8:15 pm

1 stop8h 35m

Seattle/Tacoma Intl

Tue 10/28

9:10 am-9:00 pm

1 stop8h 50m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Thu 11/13

5:10 am-10:40 am

1 stop8h 30m

Seattle/Tacoma Intl

Thu 11/20

6:35 am-3:50 pm

1 stop6h 15m

$198

New YorkSeattle

LGA - SEA

LGASEA

New York LaGuardia

Thu 10/30

9:00 am-6:00 pm

2 stops12h 00m

Seattle/Tacoma Intl

Wed 11/5

5:40 am-3:40 pm

1 stop7h 00m

$202

NewarkSeattle

EWR - SEA

EWRSEA

Newark

Thu 11/13

3:03 pm-8:54 pm

1 stop8h 51m

Seattle/Tacoma Intl

Sun 11/16

6:00 am-2:16 pm

Nonstop5h 16m

$207

NewarkSeattle

EWR - SEA

EWRSEA

Newark

Thu 11/6

7:28 pm-10:46 pm

Nonstop6h 18m

Seattle/Tacoma Intl

Mon 11/10

12:35 pm-11:09 pm

1 stop7h 34m

$207

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Wed 10/29

1:10 pm-7:15 pm

1 stop9h 05m

Seattle/Tacoma Intl

Mon 11/3

6:35 am-3:50 pm

1 stop6h 15m

$211

NewarkSeattle

EWR - SEA

EWRSEA

Newark

Thu 11/6

5:30 pm-8:46 pm

Nonstop6h 16m

Seattle/Tacoma Intl

Tue 11/11

7:00 am-3:25 pm

Nonstop5h 25m

$217

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/15

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, March is the cheapest month in which you can book a flight from Pennsylvania to Seattle (average of $158). 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 October 17, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 49% on flights from Pennsylvania to Seattle by exploring options for tickets in the evening.

What is the cheapest day to fly from Pennsylvania to Seattle?

Use this chart to determine the cheapest time to fly round-trip from Pennsylvania to Seattle. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Pennsylvania to Seattle flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

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 October 17, 2025.

The most flights from USPA to SEA are scheduled on a Thursday (12 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (6 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, 38 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 24m. 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?

    $90 is the cheapest one-way deal found within the past few days, from American Airlines. You may also be able to find cheap deals on Delta and Southwest, with prices starting from $99 and $99, 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, 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 (83%), British Airways (78%) and Alaska Airlines (77%).

  • What are the cheapest flights from Pennsylvania to Seattle?

    On average you can expect to pay $1,376 for a flight from Pennsylvania to Seattle. The cheapest flight overall is $114 while the most popular route, (New York John F Kennedy Intl - Seattle/Tacoma Intl) is currently priced at $179.

  • 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, March is the cheapest month in which you can book a flight from Pennsylvania to Seattle (average of $158). 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
SeaTac
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Marysville
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen

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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 October 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$255FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$127Average$252FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$178Average$413FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$178Average$509FlexibilityNo cancel feeOn-time71%
DeltaCheapest$196Average$372FlexibilityNo cancel feeOn-timeN/A
Hawaiian AirlinesCheapest$235Average$447FlexibilityNo cancel feeOn-time85%
United AirlinesCheapest$236Average$491FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$238Average$360FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$251Average$520FlexibilityNo cancel feeOn-time75%

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