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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 1/7. Fares are subject to change and may not be available on all flights or dates of travel.
PHL — SEA
ene. 11 — ene. 181
dom. 1/11
dom. 1/18
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 diciembre 12, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/9. 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.
sáb. 12/274:41 pmEWR - SEA
1 stop7h 51mAlaska Airlines
sáb. 1/38:04 amSEA - EWR
Nonstop5h 26mAlaska Airlines
Deal found 12/9$250
This Frontier deal was found by Cheapflights users on 12/8. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/174:29 pmJFK - SEA
1 stop10h 41mFrontier
sáb. 1/106:34 pmSEA - JFK
1 stop8h 56mFrontier
Deal found 12/8$253
This American Airlines deal was found by Cheapflights users on 12/11. 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.
sáb. 12/206:10 amPIT - SEA
1 stop9h 27mAmerican Airlines
dom. 1/411:59 pmSEA - PIT
1 stop7h 51mAmerican Airlines
Deal found 12/11$259
This Delta deal was found by Cheapflights users on 12/11. 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.
dom. 12/216:30 pmPIT - SEA
1 stop8h 28mDelta
mié. 12/3112:55 amSEA - PIT
1 stop6h 25mDelta
Deal found 12/11$268
This Booking.com deal was found by Cheapflights users on 12/8. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/116:59 amJFK - SEA
1 stop30h 07mFrontier
lun. 12/1511:01 amSEA - JFK
1 stop15h 29mFrontier
Deal found 12/8$287
This American Airlines deal was found by Cheapflights users on 12/11. 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.
mar. 12/234:59 pmPIT - SEA
1 stop9h 14mAmerican Airlines
dom. 1/411:59 pmSEA - PIT
1 stop7h 51mAmerican Airlines
Deal found 12/11$289
This Delta deal was found by Cheapflights users on 12/11. 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.
dom. 12/216:30 pmPIT - SEA
1 stop8h 28mDelta
lun. 1/59:45 pmSEA - PIT
1 stop10h 55mDelta
Deal found 12/11$293
This American Airlines deal was found by Cheapflights users on 12/11. 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.
mié. 12/177:00 amPIT - SEA
1 stop10h 05mAmerican Airlines
dom. 1/119:45 pmSEA - PIT
1 stop9h 42mAmerican Airlines
Deal found 12/11$296
This Mytrip deal was found by Cheapflights users on 12/9. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/134:29 pmJFK - SEA
1 stop22h 24mFrontier
lun. 12/1511:01 amSEA - JFK
1 stop15h 29mFrontier
Deal found 12/9$297
This Delta deal was found by Cheapflights users on 12/11. 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.
dom. 12/216:30 pmPIT - SEA
1 stop8h 28mDelta
mar. 12/3010:55 pmSEA - PIT
1 stop7h 55mDelta
Deal found 12/11$299
This CheapOair deal was found by Cheapflights users on 12/10. 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.
lun. 12/227:10 amPHL - SEA
1 stop30h 01mFrontier
mié. 12/312:46 pmSEA - PHL
1 stop11h 54mFrontier
Deal found 12/10$299
This CheapOair deal was found by Cheapflights users on 12/11. 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.
jue. 12/188:36 pmPHL - SEA
1 stop18h 54mFrontier
jue. 12/251:25 pmSEA - PHL
1 stop13h 06mFrontier
Deal found 12/11$305

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 diciembre 12, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$197
(Delta)

One-way from

$90
(American Airlines)

Popular in

June

Cheapest in

October

Average price

$496

Good round-trip deal

$297 or less

Good one-way deal

$181 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
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 ($61 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 December 2025
Search Deals
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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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 diciembre 12, 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

lun. 2/23

5:05 pm-12:09 am

1 stop10h 04m

Seattle/Tacoma Intl

lun. 3/2

6:10 am-4:37 pm

1 stop7h 27m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

mié. 2/25

11:15 am-8:00 pm

1 stop11h 45m

Seattle/Tacoma Intl

jue. 3/5

5:30 am-4:08 pm

1 stop7h 38m

$197

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

mar. 1/6

5:45 pm-10:30 pm

1 stop7h 45m

Seattle/Tacoma Intl

sáb. 1/10

5:15 am-3:00 pm

1 stop6h 45m

$219

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

mié. 2/18

7:05 am-3:10 pm

1 stop11h 05m

Seattle/Tacoma Intl

sáb. 2/21

6:00 am-4:28 pm

1 stop7h 28m

$219

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

mié. 1/21

12:23 pm-8:00 pm

1 stop10h 37m

Seattle/Tacoma Intl

sáb. 1/24

6:05 am-4:46 pm

1 stop7h 41m

$219

Washington, D.C.Seattle

IAD - SEA

IADSEA

Washington, D.C. Dulles Intl

sáb. 1/10

5:27 pm-9:49 pm

1 stop7h 22m

Seattle/Tacoma Intl

sáb. 1/17

6:05 am-4:46 pm

1 stop7h 41m

$219

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

mar. 2/24

6:05 am-10:42 am

1 stop7h 37m

Seattle/Tacoma Intl

sáb. 2/28

6:05 am-6:29 pm

1 stop9h 24m

$219

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

vie. 1/23

7:35 am-2:45 pm

1 stop10h 10m

Seattle/Tacoma Intl

lun. 1/26

11:10 pm-12:00 pm

1 stop9h 50m

$219

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

jue. 1/8

5:45 pm-10:30 pm

1 stop7h 45m

Seattle/Tacoma Intl

mié. 1/14

11:20 am-12:10 am

2 stops9h 50m

$224

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

mar. 1/6

5:45 pm-10:30 pm

1 stop7h 45m

Seattle/Tacoma Intl

dom. 1/11

5:00 am-10:05 pm

1 stop14h 05m

$224

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

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 $156). Flying from Pennsylvania to Seattle in June is currently the most expensive (average of $244). 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 diciembre 12, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 48% 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 diciembre 12, 2025.

The most flights from USPA to SEA are scheduled on a Thursday (10 on average). You will have fewer flight options on Sunday, which is when the least amount of flights are scheduled (5 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, 35 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 6h 01m. Pennsylvania and Seattle are separated by a distance of 2299 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 Southwest and American Airlines, with prices starting from $97 and $97, 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. Dulles Intl - 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 (88%), British Airways (86%) and Alaska Airlines (81%).

  • What are the cheapest flights from Pennsylvania to Seattle?

    On average you can expect to pay $1,215 for a flight from Pennsylvania to Seattle. The cheapest flight overall is $148 while the most popular route, (New York John F Kennedy Intl - Seattle/Tacoma Intl) is currently priced at $251.

  • 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 $156). Flying from Pennsylvania to Seattle in June is currently the most expensive (average of $244). 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
Olympia
Ocean Shores
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Tukwila
Kent
Cle Elum
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Leavenworth
Fife
Aberdeen
Shoreline
Centralia
Federal Way

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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 diciembre 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$99Average$257FlexibilityNo cancel feeOn-time62%
Spirit AirlinesCheapest$115Average$253FlexibilityNo cancel feeOn-time65%
SouthwestCheapest$178Average$416FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$178Average$503FlexibilityNo cancel feeOn-time71%
DeltaCheapest$193Average$361FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$231Average$479FlexibilityNo cancel feeOn-time69%
Hawaiian AirlinesCheapest$235Average$447FlexibilityNo cancel feeOn-time85%
Sun Country AirCheapest$238Average$369FlexibilityNo cancel feeOn-time83%
Alaska AirlinesCheapest$238Average$498FlexibilityNo cancel feeOn-time75%

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