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Cheap flights from Pennsylvania to Seattle from $84

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Pennsylvania to Seattle departing on 5/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Pennsylvania to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
Alaska Airlines Logo
7:31 pm - 10:04 pm
PIT
-
SEA
5h 33mnonstop
Alaska Airlines Logo
11:02 am - 6:35 pm
SEA
-
PIT
4h 33mnonstop
$177Alaska Airlines
Wed, Mar 4 - Wed, Mar 11
American Airlines Logo
7:09 pm - 12:24 am
PIT
-
SEA
8h 15m
1 stop
American Airlines Logo
1:37 pm - 11:18 pm
SEA
-
PIT
6h 41m
1 stop
$179American Airlines
Wed, Feb 25 - Thu, Mar 5
Alaska Airlines Logo
7:31 pm - 10:04 pm
PIT
-
SEA
5h 33mnonstop
Alaska Airlines Logo
11:02 am - 6:35 pm
SEA
-
PIT
4h 33mnonstop
$187Alaska Airlines
Wed, Feb 25 - Thu, Mar 5
Frontier Logo
2:00 pm - 12:01 pm
DCA
-
SEA
25h 01m
1 stop
Frontier Logo
9:36 pm - 9:59 pm
SEA
-
DCA
21h 23m
2 stops
$191Frontier
Wed, Mar 4 - Mon, Mar 9
Frontier Logo
8:00 am - 12:01 pm
DCA
-
SEA
31h 01m
1 stop
Frontier Logo
12:24 pm - 1:02 pm
SEA
-
DCA
21h 38m
1 stop
$193Frontier
Wed, Mar 4 - Mon, Mar 9
American Airlines Logo
7:09 pm - 12:24 am
PIT
-
SEA
8h 15m
1 stop
American Airlines Logo
11:57 pm - 10:44 am
SEA
-
PIT
7h 47m
1 stop
$198American Airlines
Sun, Mar 1 - Fri, Mar 6
United Airlines Logo
3:17 pm - 10:43 pm
EWR
-
SEA
10h 26m
1 stop
United Airlines Logo
12:43 pm - 9:00 pm
SEA
-
EWR
5h 17mnonstop
$207United Airlines
Tue, Feb 24 - Thu, Feb 26
Southwest Logo
8:30 am - 12:40 pm
PIT
-
SEA
7h 10m
1 stop
Southwest Logo
11:55 pm - 10:15 am
SEA
-
PIT
7h 20m
1 stop
$208Southwest
Thu, Mar 19 - Mon, Mar 23
Southwest Logo
8:10 pm - 12:30 am
PIT
-
SEA
7h 20m
1 stop
Southwest Logo
11:55 pm - 11:35 am
SEA
-
PIT
8h 40m
2 stops
$213Southwest
Fri, Mar 13 - Mon, Mar 16
United Airlines Logo
7:29 pm - 10:53 pm
EWR
-
SEA
6h 24mnonstop
United Airlines Logo
8:00 am - 7:00 pm
SEA
-
EWR
8h 00m
1 stop
$215United Airlines
Fri, Mar 6 - Tue, Mar 10

American Airlines flights from Pennsylvania to Seattle

Our best American Airlines deals on Pennsylvania to Seattle flight tickets
American Airlines
Feb 25
PIT7:09 pmPittsburgh
8h 15m
1 stop
SEA12:24 amSeattle/Tacoma Intl
Mar 5
SEA1:37 pmSeattle/Tacoma Intl
6h 41m
1 stop
PIT11:18 pmPittsburgh
$179
American Airlines
Mar 1
PIT7:09 pmPittsburgh
8h 15m
1 stop
SEA12:24 amSeattle/Tacoma Intl
Mar 6
SEA11:57 pmSeattle/Tacoma Intl
7h 47m
1 stop
PIT10:44 amPittsburgh
$198
American Airlines
Feb 18
IAD5:00 amWashington, D.C. Dulles Intl
9h 27m
1 stop
SEA11:27 amSeattle/Tacoma Intl
Feb 21
SEA5:37 amSeattle/Tacoma Intl
7h 57m
1 stop
IAD4:34 pmWashington, D.C. Dulles Intl
$217

Alaska Airlines flights from Pennsylvania to Seattle

Our best Alaska Airlines deals on Pennsylvania to Seattle flight tickets
Alaska Airlines
Mar 4
PIT7:31 pmPittsburgh
5h 33m
SEA10:04 pmSeattle/Tacoma Intl
Mar 11
SEA11:02 amSeattle/Tacoma Intl
4h 33m
PIT6:35 pmPittsburgh
$177
Alaska Airlines
Feb 25
PIT7:31 pmPittsburgh
5h 33m
SEA10:04 pmSeattle/Tacoma Intl
Mar 5
SEA11:02 amSeattle/Tacoma Intl
4h 33m
PIT6:35 pmPittsburgh
$187
Alaska Airlines
Mar 12
PIT7:31 pmPittsburgh
5h 33m
SEA10:04 pmSeattle/Tacoma Intl
Mar 16
SEA11:02 amSeattle/Tacoma Intl
4h 33m
PIT6:35 pmPittsburgh
$197

momondo 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, momondo users made 832,500 searches. Data last updated February 3, 2026.
Use the filters below to find and compare flights from Pennsylvania to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Wed 3/4

7:31 pm-10:04 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Wed 3/11

11:02 am-6:35 pm

Nonstop4h 33m

$177

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Wed 2/25

7:09 pm-12:24 am

1 stop8h 15m

Seattle/Tacoma Intl

Thu 3/5

1:37 pm-11:18 pm

1 stop6h 41m

$179

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Wed 2/25

7:31 pm-10:04 pm

Nonstop5h 33m

Seattle/Tacoma Intl

Thu 3/5

11:02 am-6:35 pm

Nonstop4h 33m

$187

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 3/4

2:00 pm-12:01 pm

1 stop25h 01m

Seattle/Tacoma Intl

Mon 3/9

9:36 pm-9:59 pm

2 stops21h 23m

$191

Washington, D.C.Seattle

DCA - SEA

DCASEA

Washington, D.C. Reagan-National

Wed 3/4

8:00 am-12:01 pm

1 stop31h 01m

Seattle/Tacoma Intl

Mon 3/9

12:24 pm-1:02 pm

1 stop21h 38m

$193

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Sun 3/1

7:09 pm-12:24 am

1 stop8h 15m

Seattle/Tacoma Intl

Fri 3/6

11:57 pm-10:44 am

1 stop7h 47m

$198

NewarkSeattle

EWR - SEA

EWRSEA

Newark

Tue 2/24

3:17 pm-10:43 pm

1 stop10h 26m

Seattle/Tacoma Intl

Thu 2/26

12:43 pm-9:00 pm

Nonstop5h 17m

$207

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Thu 3/19

8:30 am-12:40 pm

1 stop7h 10m

Seattle/Tacoma Intl

Mon 3/23

11:55 pm-10:15 am

1 stop7h 20m

$208

PittsburghSeattle

PIT - SEA

PITSEA

Pittsburgh

Fri 3/13

8:10 pm-12:30 am

1 stop7h 20m

Seattle/Tacoma Intl

Mon 3/16

11:55 pm-11:35 am

2 stops8h 40m

$213

NewarkSeattle

EWR - SEA

EWRSEA

Newark

Fri 3/6

7:29 pm-10:53 pm

Nonstop6h 24m

Seattle/Tacoma Intl

Tue 3/10

8:00 am-7:00 pm

1 stop8h 00m

$215

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Pennsylvania to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, October is the cheapest month to fly from Pennsylvania to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $317. If you don’t want to visit Seattle in October, then you should wait until March to fly from Pennsylvania, when ticket prices are also cheap, with an average price of $337.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Pennsylvania is on a Thursday. momondo users have found tickets for Thursday departures for as low as $459. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Pennsylvania because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $586.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Pennsylvania in the evening is the least expensive time of day to depart. momondo users have found prices as low as $444 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $512. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

What is the cheapest Pennsylvania to Seattle/Tacoma Intl flight route?

Fly from Philadelphia to Seattle/Tacoma Intl for the best Pennsylvania - Seattle/Tacoma Intl flight prices

How far in advance should I book a flight to Seattle?

You are more likely to see cheaper flights to Seattle from Pennsylvania when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $406 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Pennsylvania for as low as $369 on momondo.

What cabin class options are available on Pennsylvania to Seattle/Tacoma Intl flights?

There are 4 cabin classes available to choose from on Pennsylvania to Seattle/Tacoma Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Pennsylvania to Seattle flights?

You could potentially save up to 4% on your flight if you consider stops on a Pennsylvania to Seattle flight.

Cheap Pennsylvania to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Pennsylvania to Seattle

Best Price Found

$212

Fastest flight time

5h 18m

Direct flights

Every day

Airports in Seattle

1 airport
The best one-way flight to Seattle from Pennsylvania in the past 72 hours is $212. The best round-trip flight deal from Pennsylvania to Seattle found on momondo in the last 72 hours is $297.
The fastest flight from Pennsylvania to Seattle takes 5h 18m
Direct flights go from Pennsylvania to Seattle every day.
There is 1 airport in Seattle. From Pennsylvania there are direct flights to Seattle/Tacoma Intl (SEA).
Search flight deals

  • When did momondo last update prices for flights from Pennsylvania to Seattle/Tacoma Intl Airport?

    Prices for flights from Pennsylvania to Seattle/Tacoma Intl Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Pennsylvania to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Pennsylvania to Seattle/Tacoma Intl Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Pennsylvania to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The required travel and health documents for your Seattle/Tacoma Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Pennsylvania to Seattle?

Best airlines flying from Pennsylvania to Seattle

Compare and see reviews for airlines that fly from Pennsylvania to Seattle with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $99Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
Spirit AirlinesPriceFrom $106Free CancellationRating
6.3
8,399 reviews
Search Spirit Airlines flights
DeltaPriceFrom $149Free CancellationRating
7.9
8,135 reviews
Search Delta flights
SouthwestPriceFrom $157Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
Hawaiian AirlinesPriceFrom $173Free CancellationRating
7.8
2,830 reviews
Search Hawaiian Airlines flights
American AirlinesPriceFrom $178Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights
Sun Country AirPriceFrom $211Free CancellationRating
6.9
342 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $221Free CancellationRating
7.4
9,231 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $226Free CancellationRating
8.0
11,831 reviews
Search Alaska Airlines flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Lynnwood
Kent
Marysville
Redmond
Puyallup
Cle Elum
Tukwila
Lakewood
Federal Way
Westport
Kirkland
Centralia
Fife
Tumwater

Why use momondo?

Why should I use momondo to find a flight deal from Pennsylvania to Seattle?

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Pennsylvania to Seattle for you.

Can I find flights from Pennsylvania to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from Pennsylvania with this policy.

How can momondo help me find flights from Pennsylvania to Seattle?

Once you have performed a search for Pennsylvania to Seattle flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Pennsylvania to Seattle right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Seattle from Pennsylvania. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

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