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Cheap flights from Portland, Maine to Seattle from $121

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland, Maine to Seattle departing on 3/7. 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 Portland, Maine to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
6:01 pm - 12:36 am
PWM
-
SEA
9h 35m
1 stop
American Airlines Logo
12:34 pm - 11:27 pm
SEA
-
PWM
7h 53m
1 stop
$241American Airlines
Fri, May 8 - Tue, May 19
American Airlines Logo
6:01 pm - 12:36 am
PWM
-
SEA
9h 35m
1 stop
American Airlines Logo
1:19 pm - 12:13 am
SEA
-
PWM
7h 54m
1 stop
$276American Airlines
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
6:01 pm - 12:36 am
PWM
-
SEA
9h 35m
1 stop
American Airlines Logo
1:19 pm - 12:17 am
SEA
-
PWM
7h 58m
1 stop
$277American Airlines
Wed, May 13 - Tue, May 19
American Airlines Logo
3:39 pm - 12:36 am
PWM
-
SEA
11h 57m
2 stops
American Airlines Logo
1:19 pm - 12:13 am
SEA
-
PWM
7h 54m
1 stop
$281American Airlines
Tue, Apr 21 - Tue, Apr 28
American Airlines Logo
3:39 pm - 12:36 am
PWM
-
SEA
11h 57m
2 stops
American Airlines Logo
12:34 pm - 11:27 pm
SEA
-
PWM
7h 53m
1 stop
$282American Airlines
Wed, May 13 - Tue, May 19
American Airlines Logo
6:01 pm - 12:36 am
PWM
-
SEA
9h 35m
1 stop
American Airlines Logo
10:47 pm - 10:23 am
SEA
-
PWM
8h 36m
1 stop
$284American Airlines
Fri, Apr 24 - Mon, Apr 27
Delta Logo
1:18 pm - 10:48 pm
PWM
-
SEA
12h 30m
2 stops
Delta Logo
5:30 am - 11:09 pm
SEA
-
PWM
14h 39m
2 stops
$286Delta
Wed, May 27 - Sat, May 30
American Airlines Logo
6:01 pm - 12:36 am
PWM
-
SEA
9h 35m
1 stop
American Airlines Logo
10:47 pm - 10:23 am
SEA
-
PWM
8h 36m
1 stop
$288American Airlines
Fri, Apr 24 - Mon, Apr 27
American Airlines Logo
5:58 pm - 12:24 am
PWM
-
SEA
9h 26m
1 stop
American Airlines Logo
10:57 pm - 12:14 pm
SEA
-
PWM
10h 17m
1 stop
$297American Airlines
Wed, Mar 25 - Wed, Apr 1
United Airlines Logo
4:23 pm - 10:45 pm
PWM
-
SEA
9h 22m
1 stop
United Airlines Logo
12:25 pm - 11:04 pm
SEA
-
PWM
7h 39m
1 stop
$299United Airlines
Thu, Mar 12 - Mon, Mar 16

American Airlines flights from Portland, Maine to Seattle

Our best American Airlines deals on Portland, Maine to Seattle flight tickets
American Airlines
Apr 9
PWM6:00 amPortland
8h 34m
1 stop
SEA11:34 amSeattle/Tacoma Intl
Apr 15
SEA11:16 amSeattle/Tacoma Intl
9h 11m
1 stop
PWM11:27 pmPortland
$241
American Airlines
Apr 21
PWM6:01 pmPortland
9h 35m
1 stop
SEA12:36 amSeattle/Tacoma Intl
Apr 28
SEA1:19 pmSeattle/Tacoma Intl
7h 54m
1 stop
PWM12:13 amPortland
$276
American Airlines
May 13
PWM6:01 pmPortland
9h 35m
1 stop
SEA12:36 amSeattle/Tacoma Intl
May 19
SEA1:19 pmSeattle/Tacoma Intl
7h 58m
1 stop
PWM12:17 amPortland
$277

Southwest flights from Portland, Maine to Seattle

Our best Southwest deals on Portland, Maine to Seattle flight tickets
Southwest
Apr 7
PWM3:50 pmPortland
11h 20m
2 stops
SEA12:10 amSeattle/Tacoma Intl
Apr 29
SEA11:45 pmSeattle/Tacoma Intl
11h 25m
2 stops
PWM2:10 pmPortland
$340
Southwest
Aug 18
PWM5:45 amPortland
12h 15m
2 stops
SEA3:00 pmSeattle/Tacoma Intl
Aug 25
SEA10:30 pmSeattle/Tacoma Intl
8h 25m
1 stop
PWM9:55 amPortland
$350
Southwest
Aug 18
PWM5:45 amPortland
12h 15m
2 stops
SEA3:00 pmSeattle/Tacoma Intl
Aug 25
SEA11:05 pmSeattle/Tacoma Intl
10h 20m
2 stops
PWM12:25 pmPortland
$355

momondo Fare Finder

 
Customize your flight search to find flights from Portland, Maine 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 27, 2026.
Use the filters below to find and compare flights from Portland, Maine to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Fri 5/8

6:01 pm-12:36 am

1 stop9h 35m

Seattle/Tacoma Intl

Tue 5/19

12:34 pm-11:27 pm

1 stop7h 53m

$241

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 4/21

6:01 pm-12:36 am

1 stop9h 35m

Seattle/Tacoma Intl

Tue 4/28

1:19 pm-12:13 am

1 stop7h 54m

$276

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 5/13

6:01 pm-12:36 am

1 stop9h 35m

Seattle/Tacoma Intl

Tue 5/19

1:19 pm-12:17 am

1 stop7h 58m

$277

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 4/21

3:39 pm-12:36 am

2 stops11h 57m

Seattle/Tacoma Intl

Tue 4/28

1:19 pm-12:13 am

1 stop7h 54m

$281

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 5/13

3:39 pm-12:36 am

2 stops11h 57m

Seattle/Tacoma Intl

Tue 5/19

12:34 pm-11:27 pm

1 stop7h 53m

$282

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Fri 4/24

6:01 pm-12:36 am

1 stop9h 35m

Seattle/Tacoma Intl

Mon 4/27

10:47 pm-10:23 am

1 stop8h 36m

$284

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 5/27

1:18 pm-10:48 pm

2 stops12h 30m

Seattle/Tacoma Intl

Sat 5/30

5:30 am-11:09 pm

2 stops14h 39m

$286

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Fri 4/24

6:01 pm-12:36 am

1 stop9h 35m

Seattle/Tacoma Intl

Mon 4/27

10:47 pm-10:23 am

1 stop8h 36m

$288

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 3/25

5:58 pm-12:24 am

1 stop9h 26m

Seattle/Tacoma Intl

Wed 4/1

10:57 pm-12:14 pm

1 stop10h 17m

$297

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 3/12

4:23 pm-10:45 pm

1 stop9h 22m

Seattle/Tacoma Intl

Mon 3/16

12:25 pm-11:04 pm

1 stop7h 39m

$299

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 Portland, Maine 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, November is the cheapest month to fly from Portland, Maine to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $375. If you don’t want to visit Seattle in November, then you should wait until September to fly from Portland, Maine, when ticket prices are also cheap, with an average price of $394.

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

On average, the least expensive day to fly to Seattle from Portland, Maine is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $404. 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 Portland, Maine because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $504.

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

Flying to Seattle from Portland, Maine in the evening is the least expensive time of day to depart. momondo users have found prices as low as $361 when looking at flights departing in the evening. Flights to Seattle are more costly in the morning, with an average ticket price of $466. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

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

You are more likely to see cheaper flights to Seattle from Portland, Maine when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $472 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Portland, Maine for as low as $328 on momondo.

Can stopping save me money on Portland, Maine to Seattle flights?

You could potentially save up to 25% on your flight if you consider stops on a Portland, Maine to Seattle flight.

How have Portland, Maine to Seattle flight prices changed over time?

As of February 2026, prices for Portland, Maine to Seattle flights are approximately 22% cheaper when compared to flights at the same time last year.

When to book flights from Portland, Maine to Seattle

Are you open to changing your travel dates? Check out the ideal times to fly from Portland, Maine to Seattle according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Portland, Maine to Seattle (PWM to SEA) flight deals and tips

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

Fastest flight time

8h 34m

Direct flights

None
The fastest flight from Portland, Maine to Seattle takes 8h 34m
There are no direct flights from Portland, Maine to Seattle. There are no popular flight routes from Portland, Maine to Seattle.
Search flight deals

  • How far is Portland to Seattle/Tacoma Intl by plane?

    A flight from Portland to Seattle/Tacoma Intl will travel around 2481.6 mi. Flights usually cover this in 8h 34m, depending on flying conditions and air traffic around both airports.

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

    Prices for flights from Portland Airport to Seattle/Tacoma Intl Airport refresh daily.

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

  • How old do you have to be to fly from Portland Airport 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 Portland Airport to Seattle/Tacoma Intl Airport.

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

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from Portland, Maine to Seattle?

Best airlines flying from Portland, Maine to Seattle

Compare and see reviews for airlines that fly from Portland, Maine to Seattle with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $155Free CancellationRating
7.9
8,240 reviews
Search Delta flights
JetBluePriceFrom $208Free CancellationRating
7.2
2,895 reviews
Search JetBlue flights
Sun Country AirPriceFrom $242Free CancellationRating
6.8
340 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $275Free CancellationRating
7.4
9,360 reviews
Search United Airlines flights
American AirlinesPriceFrom $294Free CancellationRating
7.1
11,368 reviews
Search American Airlines flights
SouthwestPriceFrom $394Free CancellationRating
8.0
4,301 reviews
Search Southwest 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
Lakewood
Tukwila
Federal Way
Fife
Westport
Kirkland
Centralia
Tumwater

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Seattle. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Seattle from Portland which offer a flexible booking policy as well as other useful filters and features.

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Seattle from Portland.

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

If you are not ready to book a flight from Portland to Seattle now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Seattle and let you know when they change.

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