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Cheap flights from Portland, Maine to Seattle from $111

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 11/8. 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.
Delta Logo
6:08 am - 5:00 pmPWM-SEA
13h 52m2 stops
Delta Logo
6:00 am - 4:07 pmSEA-PWM
7h 07m1 stop
$226Delta
Find Deal
Thu, Dec 11 - Tue, Dec 16
Delta Logo
6:08 am - 5:00 pmPWM-SEA
13h 52m2 stops
Delta Logo
6:00 am - 10:23 pmSEA-PWM
13h 23m2 stops
$231Delta
Find Deal
Thu, Dec 11 - Tue, Dec 16
Delta Logo
6:08 am - 2:35 pmPWM-SEA
11h 27m1 stop
Delta Logo
6:00 am - 4:07 pmSEA-PWM
7h 07m1 stop
$248Delta
Find Deal
Thu, Dec 11 - Tue, Dec 16
United Airlines Logo
4:25 pm - 10:28 pmPWM-SEA
9h 03m1 stop
United Airlines Logo
10:40 am - 11:09 pmSEA-PWM
9h 29m2 stops
$268United Airlines
Find Deal
Wed, Dec 3 - Mon, Dec 8
United Airlines Logo
6:00 am - 4:07 pmPWM-SEA
13h 07m2 stops
United Airlines Logo
10:40 am - 11:09 pmSEA-PWM
9h 29m2 stops
$273United Airlines
Find Deal
Wed, Dec 3 - Mon, Dec 8
Delta Logo
2:35 pm - 10:16 pmPWM-SEA
10h 41m1 stop
Delta Logo
11:45 am - 11:59 pmSEA-PWM
9h 14m1 stop
$275Delta
Find Deal
Sat, Apr 25 - Sat, May 2
American Airlines Logo
3:55 pm - 9:50 pmPWM-SEA
8h 55m1 stop
American Airlines Logo
10:58 pm - 12:11 pmSEA-PWM
10h 13m1 stop
$310American Airlines
Find Deal
Sun, Dec 7 - Fri, Dec 12
American Airlines Logo
12:23 pm - 11:25 pmPWM-SEA
14h 02m2 stops
American Airlines Logo
10:07 pm - 11:37 amSEA-PWM
10h 30m2 stops
$320American Airlines
Find Deal
Fri, Dec 5 - Sun, Dec 7
Southwest Logo
12:45 pm - 10:55 pmPWM-SEA
13h 10m2 stops
Southwest Logo
9:35 am - 10:15 pmSEA-PWM
9h 40m2 stops
$355Southwest
Find Deal
Thu, Dec 11 - Wed, Dec 17
Southwest Logo
3:00 pm - 12:35 amPWM-SEA
12h 35m2 stops
Southwest Logo
8:35 am - 12:20 amSEA-PWM
12h 45m2 stops
$378Southwest
Find Deal
Sun, Dec 7 - Fri, Dec 12

Delta flights from Portland, Maine to Seattle

Our best Delta deals on Portland, Maine to Seattle flight tickets
Delta
Nov 12
PWM2:30 pmPortland
10h 55m
1 stop
SEA10:25 pmSeattle/Tacoma Intl
Nov 18
SEA11:10 pmSeattle/Tacoma Intl
9h 58m
1 stop
PWM12:08 pmPortland
$221
Find similar
Delta
Nov 11
PWM1:25 pmPortland
13h 36m
2 stops
SEA12:01 amSeattle/Tacoma Intl
Nov 15
SEA6:00 amSeattle/Tacoma Intl
7h 07m
1 stop
PWM4:07 pmPortland
$226
Find similar
Delta
Nov 11
PWM1:25 pmPortland
13h 36m
2 stops
SEA12:01 amSeattle/Tacoma Intl
Nov 15
SEA6:00 amSeattle/Tacoma Intl
13h 19m
2 stops
PWM10:19 pmPortland
$231
Find similar

United Airlines flights from Portland, Maine to Seattle

Our best United Airlines deals on Portland, Maine to Seattle flight tickets
United Airlines
Dec 3
PWM4:25 pmPortland
9h 03m
1 stop
SEA10:28 pmSeattle/Tacoma Intl
Dec 8
SEA10:40 amSeattle/Tacoma Intl
9h 29m
2 stops
PWM11:09 pmPortland
$268
Find similar
United Airlines
Dec 3
PWM6:00 amPortland
13h 07m
2 stops
SEA4:07 pmSeattle/Tacoma Intl
Dec 8
SEA10:40 amSeattle/Tacoma Intl
9h 29m
2 stops
PWM11:09 pmPortland
$273
Find similar
United Airlines
Nov 14
PWM3:20 pmPortland
10h 50m
1 stop
SEA11:10 pmSeattle/Tacoma Intl
Nov 16
SEA5:05 amSeattle/Tacoma Intl
7h 44m
1 stop
PWM3:49 pmPortland
$277
Find similar

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 November 3, 2025.
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

Thu 12/11

6:08 am-5:00 pm

2 stops13h 52m

Seattle/Tacoma Intl

Tue 12/16

6:00 am-4:07 pm

1 stop7h 07m

$226

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 12/11

6:08 am-5:00 pm

2 stops13h 52m

Seattle/Tacoma Intl

Tue 12/16

6:00 am-10:23 pm

2 stops13h 23m

$231

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 12/11

6:08 am-2:35 pm

1 stop11h 27m

Seattle/Tacoma Intl

Tue 12/16

6:00 am-4:07 pm

1 stop7h 07m

$248

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 12/3

4:25 pm-10:28 pm

1 stop9h 03m

Seattle/Tacoma Intl

Mon 12/8

10:40 am-11:09 pm

2 stops9h 29m

$268

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 12/3

6:00 am-4:07 pm

2 stops13h 07m

Seattle/Tacoma Intl

Mon 12/8

10:40 am-11:09 pm

2 stops9h 29m

$273

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sat 4/25

2:35 pm-10:16 pm

1 stop10h 41m

Seattle/Tacoma Intl

Sat 5/2

11:45 am-11:59 pm

1 stop9h 14m

$275

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sun 12/7

3:55 pm-9:50 pm

1 stop8h 55m

Seattle/Tacoma Intl

Fri 12/12

10:58 pm-12:11 pm

1 stop10h 13m

$310

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Fri 12/5

12:23 pm-11:25 pm

2 stops14h 02m

Seattle/Tacoma Intl

Sun 12/7

10:07 pm-11:37 am

2 stops10h 30m

$320

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 12/11

12:45 pm-10:55 pm

2 stops13h 10m

Seattle/Tacoma Intl

Wed 12/17

9:35 am-10:15 pm

2 stops9h 40m

$355

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sun 12/7

3:00 pm-12:35 am

2 stops12h 35m

Seattle/Tacoma Intl

Fri 12/12

8:35 am-12:20 am

2 stops12h 45m

$378

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, January 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 $415. If you don’t want to visit Seattle in January, then you should wait until September to fly from Portland, Maine, when ticket prices are also cheap, with an average price of $417.

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 Tuesday. momondo users have found tickets for Tuesday departures for as low as $516. 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 $684.

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

Flying to Seattle from Portland, Maine in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $506 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $606. Departure times in the evening 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 $503 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 $401 on momondo.

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

You could potentially save up to 31% 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 November 2025, prices for Portland, Maine to Seattle flights are approximately 26% 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

Direct flights

None
There are no direct flights from Portland, Maine to Seattle. There are no popular flight routes from Portland, Maine to Seattle.
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  • 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 39m, 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
JetBluePriceFrom $240Free CancellationRating
7.2
2,906 reviews
Search JetBlue flights
Sun Country AirPriceFrom $304Free CancellationRating
6.9
334 reviews
Search Sun Country Air flights
DeltaPriceFrom $312Free CancellationRating
7.9
8,001 reviews
Search Delta flights
American AirlinesPriceFrom $314Free CancellationRating
7.2
11,036 reviews
Search American Airlines flights
United AirlinesPriceFrom $326Free CancellationRating
7.4
8,996 reviews
Search United Airlines flights
SouthwestPriceFrom $397Free CancellationRating
8.0
4,238 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
Puyallup
Marysville
Redmond
Tukwila
Federal Way
Lakewood
Cle Elum
Fife
Centralia
Kirkland
Shoreline
Westport

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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