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Cheap flights from Portland, Maine to Seattle from $125

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 9/2. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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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.
Southwest Logo
5:45 am - 1:00 pm
PWM
-
SEA
10h 15m
1 stop
Southwest Logo
10:30 pm - 9:55 am
SEA
-
PWM
8h 25m
1 stop
$264Southwest
Tue, Aug 18 - Tue, Aug 25
Southwest Logo
5:45 am - 1:00 pm
PWM
-
SEA
10h 15m
1 stop
Southwest Logo
7:10 am - 9:10 pm
SEA
-
PWM
11h 00m
2 stops
$269Southwest
Tue, Aug 18 - Tue, Aug 25
American Airlines Logo
9:08 am - 2:45 pm
PWM
-
SEA
8h 37m
1 stop
American Airlines Logo
5:50 am - 5:32 pm
SEA
-
PWM
8h 42m
1 stop
$273American Airlines
Thu, Aug 27 - Tue, Sep 1
Southwest Logo
5:45 am - 3:00 pm
PWM
-
SEA
12h 15m
2 stops
Southwest Logo
7:10 am - 9:10 pm
SEA
-
PWM
11h 00m
2 stops
$274Southwest
Tue, Aug 18 - Tue, Aug 25
Delta Logo
2:35 pm - 11:10 pm
PWM
-
SEA
11h 35m
1 stop
Delta Logo
11:59 pm - 10:45 am
SEA
-
PWM
7h 46m
1 stop
$297Delta
Sat, Sep 19 - Mon, Sep 28
Delta Logo
2:53 pm - 11:20 pm
PWM
-
SEA
11h 27m
1 stop
Delta Logo
11:53 pm - 10:49 am
SEA
-
PWM
7h 56m
1 stop
$298Delta
Tue, Sep 1 - Fri, Sep 11
American Airlines Logo
6:09 pm - 11:59 pm
PWM
-
SEA
8h 50m
1 stop
American Airlines Logo
5:30 am - 6:46 pm
SEA
-
PWM
10h 16m
1 stop
$299American Airlines
Tue, Sep 1 - Sat, Sep 12
American Airlines Logo
6:09 pm - 11:59 pm
PWM
-
SEA
8h 50m
1 stop
American Airlines Logo
5:30 am - 6:46 pm
SEA
-
PWM
10h 16m
1 stop
$307American Airlines
Tue, Sep 1 - Sat, Sep 12
Delta Logo
2:35 pm - 10:12 pm
PWM
-
SEA
10h 37m
1 stop
Delta Logo
11:53 pm - 10:55 am
SEA
-
PWM
8h 02m
1 stop
$315Delta
Tue, Oct 6 - Wed, Oct 21
United Airlines Logo
3:15 pm - 12:14 am
PWM
-
SEA
11h 59m
2 stops
United Airlines Logo
11:00 am - 9:27 pm
SEA
-
PWM
7h 27m
1 stop
$320United Airlines
Wed, Oct 28 - Wed, Nov 4

American Airlines flights from Portland, Maine to Seattle

Our best American Airlines deals on Portland, Maine to Seattle flight tickets
American Airlines
Aug 27
PWM9:08 amPortland
8h 37m
1 stop
SEA2:45 pmSeattle/Tacoma Intl
Sep 1
SEA5:50 amSeattle/Tacoma Intl
8h 42m
1 stop
PWM5:32 pmPortland
$273
American Airlines
Sep 1
PWM6:09 pmPortland
8h 50m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
Sep 12
SEA5:30 amSeattle/Tacoma Intl
10h 16m
1 stop
PWM6:46 pmPortland
$299
American Airlines
Sep 1
PWM6:09 pmPortland
8h 50m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
Sep 12
SEA5:30 amSeattle/Tacoma Intl
10h 16m
1 stop
PWM6:46 pmPortland
$307

United Airlines flights from Portland, Maine to Seattle

Our best United Airlines deals on Portland, Maine to Seattle flight tickets
United Airlines
Oct 28
PWM3:15 pmPortland
11h 59m
2 stops
SEA12:14 amSeattle/Tacoma Intl
Nov 4
SEA11:00 amSeattle/Tacoma Intl
7h 27m
1 stop
PWM9:27 pmPortland
$320
United Airlines
Jun 8
PWM5:15 amPortland
9h 36m
1 stop
SEA11:51 amSeattle/Tacoma Intl
Jun 9
SEA8:00 amSeattle/Tacoma Intl
8h 27m
1 stop
PWM7:27 pmPortland
$381
United Airlines
Aug 28
PWM5:03 pmPortland
8h 42m
1 stop
SEA10:45 pmSeattle/Tacoma Intl
Sep 1
SEA5:20 pmSeattle/Tacoma Intl
13h 44m
2 stops
PWM10:04 amPortland
$413

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 June 3, 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

Tue 8/18

5:45 am-1:00 pm

1 stop10h 15m

Seattle/Tacoma Intl

Tue 8/25

10:30 pm-9:55 am

1 stop8h 25m

$264

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 8/18

5:45 am-1:00 pm

1 stop10h 15m

Seattle/Tacoma Intl

Tue 8/25

7:10 am-9:10 pm

2 stops11h 00m

$269
Quickest round-trip

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 8/27

9:08 am-2:45 pm

1 stop8h 37m

Seattle/Tacoma Intl

Tue 9/1

5:50 am-5:32 pm

1 stop8h 42m

$273

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 8/18

5:45 am-3:00 pm

2 stops12h 15m

Seattle/Tacoma Intl

Tue 8/25

7:10 am-9:10 pm

2 stops11h 00m

$274

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sat 9/19

2:35 pm-11:10 pm

1 stop11h 35m

Seattle/Tacoma Intl

Mon 9/28

11:59 pm-10:45 am

1 stop7h 46m

$297

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 9/1

2:53 pm-11:20 pm

1 stop11h 27m

Seattle/Tacoma Intl

Fri 9/11

11:53 pm-10:49 am

1 stop7h 56m

$298

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 9/1

6:09 pm-11:59 pm

1 stop8h 50m

Seattle/Tacoma Intl

Sat 9/12

5:30 am-6:46 pm

1 stop10h 16m

$299

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 9/1

6:09 pm-11:59 pm

1 stop8h 50m

Seattle/Tacoma Intl

Sat 9/12

5:30 am-6:46 pm

1 stop10h 16m

$307

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 10/6

2:35 pm-10:12 pm

1 stop10h 37m

Seattle/Tacoma Intl

Wed 10/21

11:53 pm-10:55 am

1 stop8h 02m

$315

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 10/28

3:15 pm-12:14 am

2 stops11h 59m

Seattle/Tacoma Intl

Wed 11/4

11:00 am-9:27 pm

1 stop7h 27m

$320

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 April to fly from Portland, Maine, when ticket prices are also cheap, with an average price of $391.

How far in advance should I book a flight from Portland, Maine 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 $457 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 $321 on momondo.

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

As of June 2026, prices for Portland, Maine to Seattle flights are approximately 4% 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 48m

Direct flights

None
The fastest flight from Portland, Maine to Seattle takes 8h 48m
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 48m, 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
8,398 reviews
Search Delta flights
Sun Country AirPriceFrom $168Free CancellationRating
6.8
333 reviews
Search Sun Country Air flights
American AirlinesPriceFrom $285Free CancellationRating
7.1
11,642 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
9,772 reviews
Search United Airlines flights
SouthwestPriceFrom $405Free CancellationRating
8.0
4,255 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
Redmond
Kent
Lakewood
Puyallup
Tukwila
Marysville
Cle Elum
Federal Way
Fife
Centralia
Shoreline
Westport
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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