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$108+ Cheap flights from Seattle (SEA) to Pennsylvania

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 5/30. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
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Cheap flight deals from Seattle to Pennsylvania

Keep the following information in mind while searching for Seattle to Pennsylvania flight deals. Data was last updated May 1, 2025.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$221
(CheapOair)

One-way from

$108
(Cheapflightsfares)

Popular in

December

Cheapest in

March

Average price

$442

Good round-trip deal

$350 or less

Good one-way deal

$168 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Philadelphia flights.
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From Seattle/Tacoma Intl to Pennsylvania
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One-way flight from Seattle/Tacoma Intl to Pennsylvania
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Highest demand for flights based on searches. 4% potential increase in price ($21 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($12 potential savings vs. average RT price).
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Average for round-trip flights in May 2025
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Price to beat on a round-trip flight from Seattle/Tacoma Intl to Pennsylvania.
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Price to beat on a one-way flight from Seattle/Tacoma Intl to Pennsylvania.
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Find flight deals from Seattle to Pennsylvania

Cheapest flights from Seattle to Pennsylvania
Explore the most affordable flight options available from Seattle to Pennsylvania. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 1, 2025.

This CheapOair deal was found by Cheapflights users on 4/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/16:00 amSEA - DCA
1 stop27h 07mFrontier
Sun 5/41:00 pmDCA - SEA
1 stop14h 44mFrontier
Deal found 4/30$221
This CheapOair deal was found by Cheapflights users on 4/30. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/118:22 pmSEA - IAD
1 stop31h 09mFrontier
Thu 5/157:31 amIAD - SEA
1 stop13h 29mFrontier
Deal found 4/30$221
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/241:48 pmSEA - DCA
Nonstop5h 11mMultiple Airlines
Sat 5/316:00 pmDCA - SEA
1 stop9h 37mMultiple Airlines
Deal found 4/30$230
This Orbitz deal was found by Cheapflights users on 4/30. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/311:30 pmSEA - IAD
Nonstop5h 06mMultiple Airlines
Fri 6/67:40 amIAD - SEA
1 stop9h 31mMultiple Airlines
Deal found 4/30$233
This Trip.com deal was found by Cheapflights users on 4/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/411:30 pmSEA - IAD
Nonstop5h 06mHawaiian Airlines
Tue 6/106:30 amIAD - SEA
Nonstop5h 40mHawaiian Airlines
Deal found 4/30$235
This Alaska Airlines deal was found by Cheapflights users on 4/30. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/241:48 pmSEA - DCA
Nonstop5h 11mAlaska Airlines
Wed 5/285:00 pmDCA - SEA
Nonstop5h 56mAlaska Airlines
Deal found 4/30$237
This Delta deal was found by Cheapflights users on 4/30. 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.
Sat 5/249:50 pmSEA - IAD
Nonstop5h 02mDelta
Tue 5/277:45 amIAD - SEA
Nonstop5h 48mDelta
Deal found 4/30$237
This Trip.com deal was found by Cheapflights users on 4/30. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/44:00 pmSEA - IAD
Nonstop4h 59mAlaska Airlines
Tue 6/107:15 amIAD - SEA
1 stop9h 29mAlaska Airlines
Deal found 4/30$245
This Mytrip deal was found by Cheapflights users on 4/30. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/213:20 pmSEA - EWR
2 stops17h 36mSpirit Airlines
Mon 5/2612:51 pmEWR - SEA
2 stops38h 19mSpirit Airlines
Deal found 4/30$250
This Delta deal was found by Cheapflights users on 4/30. 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.
Wed 5/146:00 amSEA - PIT
1 stop9h 28mDelta
Sat 5/176:35 pmPIT - SEA
1 stop6h 48mDelta
Deal found 4/30$251
This Kissandfly.com deal was found by Cheapflights users on 4/30. 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 Kissandfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/119:28 pmSEA - EWR
1 stop14h 01mMultiple Airlines
Tue 5/2012:03 pmEWR - SEA
1 stop15h 07mMultiple Airlines
Deal found 4/30$252
This United Airlines deal was found by Cheapflights users on 4/29. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/2811:13 amSEA - PIT
2 stops8h 55mUnited Airlines
Wed 6/47:00 amPIT - SEA
1 stop7h 32mUnited Airlines
Deal found 4/29$252

Cheapflights Fare Finder

Customize your flight search to find flights from Seattle to Pennsylvania 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 May 1, 2025.
Use the filters below to find and compare flights from Seattle to Pennsylvania that are best for you.

Fly from

Seattle

Fly to

Pennsylvania

Route

Depart

Return

Price

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sun 5/11

8:22 pm-6:31 am

1 stop31h 09m

Washington, D.C. Dulles Intl

Thu 5/15

7:31 am-6:00 pm

1 stop13h 29m

$221

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 5/24

6:25 am-4:59 pm

1 stop7h 34m

Washington, D.C. Reagan-National

Wed 5/28

5:00 pm-7:56 pm

Nonstop5h 56m

$223

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Fri 5/16

12:31 pm-12:07 pm

1 stop20h 36m

Washington, D.C. Reagan-National

Tue 5/20

1:00 pm-11:49 pm

1 stop13h 49m

$226

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Tue 6/3

11:30 pm-7:36 am

Nonstop5h 06m

Washington, D.C. Dulles Intl

Fri 6/6

7:40 am-2:11 pm

1 stop9h 31m

$233

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 6/4

11:30 pm-7:36 am

Nonstop5h 06m

Washington, D.C. Dulles Intl

Tue 6/10

6:30 am-9:10 am

Nonstop5h 40m

$235

SeattleWashington, D.C.

SEA - DCA

SEADCA

Seattle/Tacoma Intl

Sat 5/24

1:48 pm-9:59 pm

Nonstop5h 11m

Washington, D.C. Reagan-National

Wed 5/28

5:00 pm-7:56 pm

Nonstop5h 56m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Sat 5/24

9:50 pm-5:52 am

Nonstop5h 02m

Washington, D.C. Dulles Intl

Tue 5/27

7:45 am-10:33 am

Nonstop5h 48m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 6/4

4:00 pm-11:59 pm

Nonstop4h 59m

Washington, D.C. Dulles Intl

Tue 6/10

7:15 am-1:44 pm

1 stop9h 29m

$245

SeattleNewark

SEA - EWR

SEAEWR

Seattle/Tacoma Intl

Wed 5/21

3:20 pm-11:56 am

2 stops17h 36m

Newark

Mon 5/26

12:51 pm-12:10 am

2 stops38h 19m

$250

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Wed 5/14

6:00 am-6:28 pm

1 stop9h 28m

Pittsburgh

Sat 5/17

6:35 pm-10:23 pm

1 stop6h 48m

$251

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

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

Have a flexible travel schedule? Discover the best time to fly to Pennsylvania from Seattle 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 Seattle to Pennsylvania

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

Currently, August is the cheapest month in which you can book a flight from Seattle to Pennsylvania (average of $236). Flying from Seattle to Pennsylvania in March is currently the most expensive (average of $295). 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 SEA to PA?

Find hourly flight availability from Seattle to Pennsylvania. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 1, 2025.

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

Weekly flight availability from Seattle to Pennsylvania

Explore weekly flight availability from Seattle to Pennsylvania. 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 May 1, 2025.

The most flights from SEA to USPA are scheduled on a Thursday (8 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Pennsylvania by month

Plan your trip to Pennsylvania by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Pennsylvania ranges from 2.7 - 4.4 inches per month. July is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Pennsylvania when rainfall is around 2.7 in.

Temperature in Pennsylvania by month

Plan your trip to Pennsylvania by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Pennsylvania, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 78.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 33.8 F).

Reviews of airlines servicing Pennsylvania

Get insights into the airlines that provide service to Pennsylvania. 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 Pennsylvania. Reviews last updated May 1, 2025.
Read reviews from past customers who have flown Alaska Airlines, Southwest and Delta from Seattle to Pennsylvania. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Alaska Airlines
8.0
Very good
9,968 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Southwest
8.0
Very good
4,294 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Delta
8.0
Very good
7,934 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
Hawaiian Airlines
7.9
Good
2,408 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥
United Airlines
7.4
Good
8,696 reviews
Alaska Airlines
8.0
Very good
9,968 reviews

Boarding

8.2

Overall

8.0

Entertainment

7.1

Crew

8.5

Comfort

7.9

Food

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2024

SEA - LAS

Seats were not that comfy especially for someone with big hips 😥

Related info for your journey

Find useful and relevant information for your journey from Seattle to Pennsylvania. 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 from for flights from Seattle to Pennsylvania?

    If you book a flight to Pennsylvania from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • How popular is this Seattle to Pennsylvania flight route?

    The Seattle/Tacoma Intl to Pennsylvania flight path was viewed by 13 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

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

    $108 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Hawaiian Airlines and Delta, with prices starting from $119 and $124, respectively.

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

    The most popular route from Seattle to Pennsylvania is Seattle/Tacoma Intl - New York John F Kennedy Intl. You may also consider Seattle/Tacoma Intl - Newark or Seattle/Tacoma Intl - New York LaGuardia.

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

    Consider Alaska Airlines (90%), Hawaiian Airlines (90%) or Air Tahiti Nui (90%) when booking your flight. These represent the most reliable airlines when flying from Seattle to Pennsylvania.

  • What are the cheapest flights from Seattle to Pennsylvania?

    On average you can expect to pay $1,007 for a flight from Seattle to Pennsylvania. The cheapest flight overall is $143 while the most popular route, (Seattle/Tacoma Intl - New York John F Kennedy Intl) is currently priced at $247.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Seattle to Pennsylvania 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 Seattle to Pennsylvania?

    Currently, August is the cheapest month in which you can book a flight from Seattle to Pennsylvania (average of $236). Flying from Seattle to Pennsylvania in March is currently the most expensive (average of $295). 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.

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Alternative routes for Seattle to Pennsylvania

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

Discover the top 9 airlines that operate flights from Seattle to Pennsylvania. 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$85Average$213FlexibilityNo cancel feeOn-time65%
FrontierCheapest$138Average$257FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$168Average$425FlexibilityNo cancel feeOn-time85%
DeltaCheapest$196Average$464FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$212Average$570FlexibilityNo cancel feeOn-time71%
Sun Country AirCheapest$220Average$333FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$236Average$596FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$241Average$432FlexibilityNo cancel feeOn-time63%
Alaska AirlinesCheapest$254Average$605FlexibilityNo cancel feeOn-time75%

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