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Cheap flights from Portland, Maine to Seattle from $146

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 5/13. 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

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Portland, Maine to Seattle

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
4:50 pm - 11:59 pm
PWM
-
SEA
10h 09m
1 stop
United Airlines Logo
10:41 pm - 10:18 am
SEA
-
PWM
8h 37m
1 stop
$316United Airlines
Sun, May 3 - Sat, May 16
American Airlines Logo
5:02 pm - 12:36 am
PWM
-
SEA
10h 34m
2 stops
American Airlines Logo
1:19 pm - 12:17 am
SEA
-
PWM
7h 58m
1 stop
$321American Airlines
Tue, May 5 - Tue, May 12
American Airlines Logo
6:00 am - 11:34 am
PWM
-
SEA
8h 34m
1 stop
American Airlines Logo
10:47 pm - 10:18 am
SEA
-
PWM
8h 31m
1 stop
$325American Airlines
Sat, May 9 - Sun, May 10
Delta Logo
5:21 am - 4:48 pm
PWM
-
SEA
14h 27m
2 stops
Delta Logo
5:30 am - 11:12 pm
SEA
-
PWM
14h 42m
2 stops
$326Delta
Tue, May 5 - Tue, May 12
American Airlines Logo
6:00 am - 11:46 am
PWM
-
SEA
8h 46m
1 stop
American Airlines Logo
1:46 pm - 12:35 am
SEA
-
PWM
7h 49m
1 stop
$331American Airlines
Thu, May 28 - Tue, Jun 2
United Airlines Logo
4:50 pm - 11:59 pm
PWM
-
SEA
10h 09m
1 stop
United Airlines Logo
10:53 pm - 10:23 am
SEA
-
PWM
8h 30m
1 stop
$334United Airlines
Wed, May 13 - Fri, May 15
American Airlines Logo
6:00 am - 11:46 am
PWM
-
SEA
8h 46m
1 stop
American Airlines Logo
11:58 pm - 12:40 pm
SEA
-
PWM
9h 42m
2 stops
$336American Airlines
Thu, May 28 - Tue, Jun 2
American Airlines Logo
6:00 am - 11:34 am
PWM
-
SEA
8h 34m
1 stop
American Airlines Logo
10:47 pm - 10:18 am
SEA
-
PWM
8h 31m
1 stop
$339American Airlines
Sat, May 9 - Sat, May 9
American Airlines Logo
3:03 pm - 10:58 pm
PWM
-
SEA
10h 55m
1 stop
American Airlines Logo
5:15 am - 5:07 pm
SEA
-
PWM
8h 52m
1 stop
$340American Airlines
Wed, Jun 3 - Wed, Jun 10
United Airlines Logo
6:20 pm - 12:14 am
PWM
-
SEA
8h 54m
1 stop
United Airlines Logo
10:58 pm - 9:23 am
SEA
-
PWM
7h 25m
1 stop
$341United Airlines
Wed, Oct 7 - Tue, Oct 13

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United Airlines flights from Portland, Maine to Seattle

Our best United Airlines deals on Portland, Maine to Seattle flight tickets
United Airlines
May 3
PWM4:50 pmPortland
10h 09m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
May 16
SEA10:41 pmSeattle/Tacoma Intl
8h 37m
1 stop
PWM10:18 amPortland
$316
United Airlines
May 13
PWM4:50 pmPortland
10h 09m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
May 15
SEA10:53 pmSeattle/Tacoma Intl
8h 30m
1 stop
PWM10:23 amPortland
$334
United Airlines
Oct 7
PWM6:20 pmPortland
8h 54m
1 stop
SEA12:14 amSeattle/Tacoma Intl
Oct 13
SEA10:58 pmSeattle/Tacoma Intl
7h 25m
1 stop
PWM9:23 amPortland
$341

Delta flights from Portland, Maine to Seattle

Our best Delta deals on Portland, Maine to Seattle flight tickets
Delta
May 5
PWM5:21 amPortland
14h 27m
2 stops
SEA4:48 pmSeattle/Tacoma Intl
May 12
SEA5:30 amSeattle/Tacoma Intl
14h 42m
2 stops
PWM11:12 pmPortland
$326
Delta
Apr 25
PWM5:21 amPortland
12h 07m
1 stop
SEA2:28 pmSeattle/Tacoma Intl
May 2
SEA12:00 pmSeattle/Tacoma Intl
9h 46m
1 stop
PWM12:46 amPortland
$341
Delta
Apr 25
PWM5:21 amPortland
14h 27m
2 stops
SEA4:48 pmSeattle/Tacoma Intl
May 2
SEA12:00 pmSeattle/Tacoma Intl
9h 46m
1 stop
PWM12:46 amPortland
$346

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 April 19, 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

Cheapest round-trip

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sun 5/3

4:50 pm-11:59 pm

1 stop10h 09m

Seattle/Tacoma Intl

Sat 5/16

10:41 pm-10:18 am

1 stop8h 37m

$316

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 5/5

5:02 pm-12:36 am

2 stops10h 34m

Seattle/Tacoma Intl

Tue 5/12

1:19 pm-12:17 am

1 stop7h 58m

$321

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sat 5/9

6:00 am-11:34 am

1 stop8h 34m

Seattle/Tacoma Intl

Sun 5/10

10:47 pm-10:18 am

1 stop8h 31m

$325

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 5/5

5:21 am-4:48 pm

2 stops14h 27m

Seattle/Tacoma Intl

Tue 5/12

5:30 am-11:12 pm

2 stops14h 42m

$326

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 5/28

6:00 am-11:46 am

1 stop8h 46m

Seattle/Tacoma Intl

Tue 6/2

1:46 pm-12:35 am

1 stop7h 49m

$331

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 5/13

4:50 pm-11:59 pm

1 stop10h 09m

Seattle/Tacoma Intl

Fri 5/15

10:53 pm-10:23 am

1 stop8h 30m

$334

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 5/28

6:00 am-11:46 am

1 stop8h 46m

Seattle/Tacoma Intl

Tue 6/2

11:58 pm-12:40 pm

2 stops9h 42m

$336

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sat 5/9

6:00 am-11:34 am

1 stop8h 34m

Seattle/Tacoma Intl

Sat 5/9

10:47 pm-10:18 am

1 stop8h 31m

$339

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 6/3

3:03 pm-10:58 pm

1 stop10h 55m

Seattle/Tacoma Intl

Wed 6/10

5:15 am-5:07 pm

1 stop8h 52m

$340
Quickest round-trip

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 10/7

6:20 pm-12:14 am

1 stop8h 54m

Seattle/Tacoma Intl

Tue 10/13

10:58 pm-9:23 am

1 stop7h 25m

$341

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 typical price of a round-trip flight between Portland, Maine and Seattle?

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 $376.

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 $437 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 $313 on momondo.

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

You could potentially save up to 7% 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 April 2026, prices for Portland, Maine to Seattle flights are approximately 31% 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 07m

Direct flights

None
The fastest flight from Portland, Maine to Seattle takes 8h 07m
There are no direct flights from Portland, Maine to Seattle. There are no popular flight routes from Portland, Maine to Seattle.
Search flight deals

Frequently asked questions about flying from Portland, Maine to Seattle

  • 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 07m, 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
8,419 reviews
Search Delta flights
Sun Country AirPriceFrom $168Free CancellationRating
6.8
336 reviews
Search Sun Country Air flights
United AirlinesPriceFrom $275Free CancellationRating
7.4
9,604 reviews
Search United Airlines flights
American AirlinesPriceFrom $285Free CancellationRating
7.1
11,622 reviews
Search American Airlines flights
SouthwestPriceFrom $418Free CancellationRating
8.0
4,329 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
Redmond
Marysville
Lakewood
Tukwila
Puyallup
Cle Elum
Federal Way
Centralia
Fife
Westport
Shoreline
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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