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$100+ 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 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — PHL
Apr 10 — Apr 171
Fri 4/10
Fri 4/17
1 adult, Economy
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Cheap 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 March 11, 2026.

This Southwest deal was found by Cheapflights users on 3/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/2511:55 pm
SEA
-
PIT
1 stop7h 05m
Southwest
Tue 4/286:05 am
PIT
-
SEA
1 stop7h 50m
Southwest
Deal found 3/10$167
This Southwest deal was found by Cheapflights users on 3/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2211:45 pm
SEA
-
PIT
1 stop12h 30m
Southwest
Sat 4/254:00 pm
PIT
-
SEA
1 stop7h 35m
Southwest
Deal found 3/10$172
This Southwest deal was found by Cheapflights users on 3/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2211:45 pm
SEA
-
PIT
1 stop12h 30m
Southwest
Tue 4/284:20 pm
PIT
-
SEA
2 stops10h 50m
Southwest
Deal found 3/10$178
This Southwest deal was found by Cheapflights users on 3/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/311:55 pm
SEA
-
PIT
1 stop7h 05m
Southwest
Wed 5/67:10 pm
PIT
-
SEA
1 stop8h 00m
Southwest
Deal found 3/10$193
This Delta deal was found by Cheapflights users on 3/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/65:35 am
SEA
-
PIT
1 stop8h 00m
Delta
Sat 5/94:45 pm
PIT
-
SEA
1 stop8h 11m
Delta
Deal found 3/10$197
This Southwest deal was found by Cheapflights users on 3/10. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/2211:45 pm
SEA
-
PIT
1 stop12h 30m
Southwest
Sun 4/268:15 pm
PIT
-
SEA
1 stop6h 55m
Southwest
Deal found 3/10$198
This Southwest deal was found by Cheapflights users on 3/6. 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.
Thu 4/3011:55 pm
SEA
-
PIT
1 stop7h 05m
Southwest
Sat 5/23:25 pm
PIT
-
SEA
1 stop9h 45m
Southwest
Deal found 3/6$199
This American Airlines deal was found by Cheapflights users on 3/9. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/241:19 pm
SEA
-
PIT
1 stop7h 35m
American Airlines
Fri 5/17:12 pm
PIT
-
SEA
1 stop8h 24m
American Airlines
Deal found 3/9$200
This Southwest deal was found by Cheapflights users on 3/6. 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.
Wed 4/16:45 am
SEA
-
PIT
1 stop13h 50m
Southwest
Mon 4/68:10 pm
PIT
-
SEA
1 stop7h 20m
Southwest
Deal found 3/6$204
This Southwest deal was found by Cheapflights users on 3/7. 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 5/25:45 am
SEA
-
PIT
2 stops9h 35m
Southwest
Fri 5/83:55 pm
PIT
-
SEA
2 stops11h 45m
Southwest
Deal found 3/7$209
This United Airlines deal was found by Cheapflights users on 3/5. 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 4/18:00 am
SEA
-
IAD
Nonstop5h 11m
United Airlines
Sun 4/51:10 pm
IAD
-
SEA
1 stop8h 50m
United Airlines
Deal found 3/5$214
This Trip.com deal was found by Cheapflights users on 3/6. 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 4/164:20 pm
SEA
-
DCA
1 stop21h 39m
Frontier
Sun 4/198:00 am
DCA
-
SEA
1 stop28h 27m
Frontier
Deal found 3/6$215

Find flight deals from Seattle to Pennsylvania

Keep the following information in mind while searching for Seattle to Pennsylvania flight deals. Data was last updated March 11, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$167
(Southwest)

One-way from

$100
(American Airlines)

Popular in

December

Cheapest in

October

Average price

$422

Good round-trip deal

$297 or less

Good one-way deal

$203 or less
Provider with most accurate pricing for Seattle/Tacoma Intl-Philadelphia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Philadelphia flights.
Search Deals
From Seattle/Tacoma Intl to Pennsylvania
Search Deals
One-way flight from Seattle/Tacoma Intl to Pennsylvania
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals
Price to beat on a round-trip flight from Seattle/Tacoma Intl to Pennsylvania.
Search Deals
Price to beat on a one-way flight from Seattle/Tacoma Intl to Pennsylvania.
Search Deals

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 March 11, 2026.
Use the filters below to find and compare flights from Seattle to Pennsylvania that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Wed 4/22

11:45 pm-3:15 pm

1 stop12h 30m

Pittsburgh

Tue 4/28

6:05 am-10:55 am

1 stop7h 50m

$172

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Sat 4/25

5:45 am-9:05 pm

2 stops12h 20m

Pittsburgh

Tue 4/28

8:25 am-12:45 pm

1 stop7h 20m

$172

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Wed 5/6

5:35 am-4:35 pm

1 stop8h 00m

Pittsburgh

Sat 5/9

4:45 pm-9:56 pm

1 stop8h 11m

$197

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Sun 5/3

11:55 pm-10:00 am

1 stop7h 05m

Pittsburgh

Wed 5/6

4:20 pm-12:10 am

2 stops10h 50m

$198

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Wed 4/22

11:45 pm-10:00 am

1 stop7h 15m

Pittsburgh

Sat 4/25

4:00 pm-8:35 pm

1 stop7h 35m

$199

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Fri 4/24

5:15 am-3:15 pm

1 stop7h 00m

Pittsburgh

Sun 4/26

8:15 pm-12:10 am

1 stop6h 55m

$199

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Wed 4/1

5:30 am-3:15 pm

1 stop6h 45m

Pittsburgh

Mon 4/6

6:25 pm-1:40 am

2 stops10h 15m

$204

SeattlePittsburgh

SEA - PIT

SEAPIT

Seattle/Tacoma Intl

Mon 5/11

11:55 pm-11:50 am

2 stops8h 55m

Pittsburgh

Fri 5/15

8:00 pm-12:05 am

1 stop7h 05m

$224

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Thu 4/30

9:04 pm-5:41 pm

1 stop17h 37m

Washington, D.C. Dulles Intl

Wed 5/6

6:56 pm-9:26 am

1 stop17h 30m

$237

SeattleWashington, D.C.

SEA - IAD

SEAIAD

Seattle/Tacoma Intl

Wed 4/15

8:00 am-4:11 pm

Nonstop5h 11m

Washington, D.C. Dulles Intl

Mon 4/20

5:26 pm-12:34 am

1 stop10h 08m

$247

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/7

Showing 1-10 of 60 resultsSorted by cheapest first
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6

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, September is the cheapest month in which you can book a flight from Seattle to Pennsylvania (average of $42). Flying from Seattle to Pennsylvania in July is currently the most expensive (average of $237). 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 March 11, 2026.

It’s typically best to fly out from Seattle to Pennsylvania in the evening. Doing so could potentially save you 44% on the flight price compared to flying in the afternoon, which is usually more expensive.

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 March 11, 2026.

The most flights from SEA to USPA are scheduled on a Monday (3 on average). You will have fewer flight options on Friday, which is when the least amount of flights are scheduled (1 on average).

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 March 11, 2026.
Read reviews from past customers who have flown Alaska Airlines,Delta, andHawaiian Airlines from Seattle to Pennsylvania. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
12,025 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Alaska Airlines
8.0
Very good
12,025 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Delta
7.9
Good
8,278 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
Hawaiian Airlines
7.8
Good
2,838 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
United Airlines
7.4
Good
9,413 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.
American Airlines
7.1
Good
11,419 reviews
Alaska Airlines
8.0
Very good
12,025 reviews

Boarding

8.1

Comfort

7.8

Overall

8.0

Entertainment

7.0

Food

7.1

Crew

8.5

Reviews

1 / 20
4.0
Okay

Anonymous,Dec 2025

SEA - MSY

I really got a lesson in upgrades. I let my seat get chosen . Both times a middle seat...on purpose ...even when we were not full. That's petty I sat behind the first class . They got more than 1 drink ...and a snack . .and the staff actually talked to them...behind a see thru shawl/sheet in the aisle....... You could see over the seats just fine and you could hear the voices just fine. But the sheet let You KNOW. Your not welcome here. For a moment I regretted not spending 300 dollars per seat so I could see a smile and eat a sandwhich and enjoy my seat . The married couple drank champain and laughed and flirted with each other. It looked so happy and care free MONEY really does buy happiness ..the hateful glares and sighs from my seat mates brought me back to reality I wasn't rich and I still had 2 hours left in this middle seat.

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 10 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from Seattle to Pennsylvania?

    Airlines like Southwest, Delta, and Alaska Airlines fly from Seattle to Pennsylvania in about 8h. The time it takes to get you to your destination can typically vary by up to 9h 37m. The distance from Seattle to Pennsylvania is about 2117 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    $89 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 Southwest and Delta, with prices starting from $97 and $98, respectively.

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

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

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

    Consider American Airlines (89%), Qatar Airways (86%) or British Airways (86%) 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 $511 for a flight from Seattle to Pennsylvania. The cheapest flight overall is $148 while the most popular route, (Seattle/Tacoma Intl - Newark) is currently priced at $229.

  • 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, September is the cheapest month in which you can book a flight from Seattle to Pennsylvania (average of $42). Flying from Seattle to Pennsylvania in July is currently the most expensive (average of $237). 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

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Top 7 airlines flying from Seattle to Pennsylvania

Discover the top 7 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 March 11, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$123Average$414FlexibilityNo cancel feeOn-timeN/A
FrontierCheapest$139Average$288FlexibilityNo cancel feeOn-time62%
Hawaiian AirlinesCheapest$168Average$427FlexibilityNo cancel feeOn-time85%
SouthwestCheapest$177Average$386FlexibilityNo cancel feeOn-time63%
American AirlinesCheapest$178Average$450FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$193Average$519FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$193Average$483FlexibilityNo cancel feeOn-time69%

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