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Cheap flights from Portland, Maine to Seattle from $142

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 8/29. 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
1 adult, Economy, 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.
American Airlines Logo
6:00 am - 11:50 am
PWM
-
SEA
8h 50m
1 stop
American Airlines Logo
5:30 am - 6:46 pm
SEA
-
PWM
10h 16m
1 stop
$365American Airlines
mar., sep. 1 - mié., sep. 9
United Airlines Logo
6:03 am - 11:32 am
PWM
-
SEA
8h 29m
1 stop
United Airlines Logo
5:00 am - 7:17 pm
SEA
-
PWM
11h 17m
2 stops
$370United Airlines
mié., ago. 26 - sáb., ago. 29
Delta Logo
2:53 pm - 11:20 pm
PWM
-
SEA
11h 27m
1 stop
Delta Logo
5:30 am - 4:01 pm
SEA
-
PWM
7h 31m
1 stop
$373Delta
mar., ago. 18 - jue., ago. 27
American Airlines Logo
3:06 pm - 8:58 pm
PWM
-
SEA
8h 52m
1 stop
American Airlines Logo
8:24 am - 10:13 pm
SEA
-
PWM
10h 49m
1 stop
$381American Airlines
jue., ago. 27 - jue., sep. 10
Southwest Logo
6:00 pm - 11:25 pm
PWM
-
SEA
8h 25m
1 stop
Southwest Logo
9:10 am - 10:10 pm
SEA
-
PWM
10h 00m
2 stops
$397Southwest
mar., oct. 6 - sáb., oct. 10
Southwest Logo
12:55 pm - 10:55 pm
PWM
-
SEA
13h 00m
2 stops
Southwest Logo
9:10 am - 10:10 pm
SEA
-
PWM
10h 00m
2 stops
$402Southwest
mar., oct. 6 - sáb., oct. 10
American Airlines Logo
6:09 pm - 11:59 pm
PWM
-
SEA
8h 50m
1 stop
American Airlines Logo
10:19 am - 10:48 pm
SEA
-
PWM
9h 29m
1 stop
$404American Airlines
mié., ago. 19 - mar., ago. 25
American Airlines Logo
6:30 am - 2:51 pm
PWM
-
SEA
11h 21m
1 stop
American Airlines Logo
10:59 am - 11:47 pm
SEA
-
PWM
9h 48m
1 stop
$409American Airlines
vie., sep. 18 - mié., sep. 23
Southwest Logo
5:45 am - 1:00 pm
PWM
-
SEA
10h 15m
1 stop
Southwest Logo
11:00 pm - 12:25 pm
SEA
-
PWM
10h 25m
2 stops
$414Southwest
mié., ago. 26 - dom., ago. 30
American Airlines Logo
3:06 pm - 10:56 pm
PWM
-
SEA
10h 50m
1 stop
American Airlines Logo
5:15 am - 6:27 pm
SEA
-
PWM
10h 12m
1 stop
$417American Airlines
jue., ago. 20 - dom., ago. 23

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American Airlines flights from Portland, Maine to Seattle

Our best American Airlines deals on Portland, Maine to Seattle flight tickets
American Airlines
Sep 1
PWM6:00 amPortland
8h 50m
1 stop
SEA11:50 amSeattle/Tacoma Intl
Sep 12
SEA11:57 pmSeattle/Tacoma Intl
10h 08m
1 stop
PWM1:05 pmPortland
$365
American Airlines
Aug 27
PWM3:06 pmPortland
8h 52m
1 stop
SEA8:58 pmSeattle/Tacoma Intl
Sep 10
SEA8:24 amSeattle/Tacoma Intl
10h 49m
1 stop
PWM10:13 pmPortland
$381
American Airlines
Aug 19
PWM6:09 pmPortland
8h 50m
1 stop
SEA11:59 pmSeattle/Tacoma Intl
Aug 25
SEA10:19 amSeattle/Tacoma Intl
9h 29m
1 stop
PWM10:48 pmPortland
$404

Delta flights from Portland, Maine to Seattle

Our best Delta deals on Portland, Maine to Seattle flight tickets
Delta
Aug 18
PWM2:53 pmPortland
11h 27m
1 stop
SEA11:20 pmSeattle/Tacoma Intl
Aug 31
SEA11:59 pmSeattle/Tacoma Intl
7h 46m
1 stop
PWM10:45 amPortland
$373
Delta
Aug 28
PWM2:53 pmPortland
11h 27m
1 stop
SEA11:20 pmSeattle/Tacoma Intl
Sep 10
SEA6:00 amSeattle/Tacoma Intl
6h 55m
1 stop
PWM3:55 pmPortland
$409
Delta
Aug 31
PWM4:47 pmPortland
8h 18m
1 stop
SEA10:05 pmSeattle/Tacoma Intl
Sep 10
SEA6:00 amSeattle/Tacoma Intl
6h 55m
1 stop
PWM3:55 pmPortland
$426

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 julio 20, 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

mar. 9/1

6:00 am-11:50 am

1 stop8h 50m

Seattle/Tacoma Intl

mié. 9/9

5:30 am-6:46 pm

1 stop10h 16m

$365

PortlandSeattle

PWM - SEA

PWMSEA

Portland

mié. 8/26

6:03 am-11:32 am

1 stop8h 29m

Seattle/Tacoma Intl

sáb. 8/29

5:00 am-7:17 pm

2 stops11h 17m

$370

PortlandSeattle

PWM - SEA

PWMSEA

Portland

mar. 8/18

2:53 pm-11:20 pm

1 stop11h 27m

Seattle/Tacoma Intl

jue. 8/27

5:30 am-4:01 pm

1 stop7h 31m

$373

PortlandSeattle

PWM - SEA

PWMSEA

Portland

jue. 8/27

3:06 pm-8:58 pm

1 stop8h 52m

Seattle/Tacoma Intl

jue. 9/10

8:24 am-10:13 pm

1 stop10h 49m

$381

PortlandSeattle

PWM - SEA

PWMSEA

Portland

mar. 10/6

6:00 pm-11:25 pm

1 stop8h 25m

Seattle/Tacoma Intl

sáb. 10/10

9:10 am-10:10 pm

2 stops10h 00m

$397

PortlandSeattle

PWM - SEA

PWMSEA

Portland

mar. 10/6

12:55 pm-10:55 pm

2 stops13h 00m

Seattle/Tacoma Intl

sáb. 10/10

9:10 am-10:10 pm

2 stops10h 00m

$402
Quickest round-trip

PortlandSeattle

PWM - SEA

PWMSEA

Portland

mié. 8/19

6:09 pm-11:59 pm

1 stop8h 50m

Seattle/Tacoma Intl

mar. 8/25

10:19 am-10:48 pm

1 stop9h 29m

$404

PortlandSeattle

PWM - SEA

PWMSEA

Portland

vie. 9/18

6:30 am-2:51 pm

1 stop11h 21m

Seattle/Tacoma Intl

mié. 9/23

10:59 am-11:47 pm

1 stop9h 48m

$409

PortlandSeattle

PWM - SEA

PWMSEA

Portland

mié. 8/26

5:45 am-1:00 pm

1 stop10h 15m

Seattle/Tacoma Intl

dom. 8/30

11:00 pm-12:25 pm

2 stops10h 25m

$414

PortlandSeattle

PWM - SEA

PWMSEA

Portland

jue. 8/20

3:06 pm-10:56 pm

1 stop10h 50m

Seattle/Tacoma Intl

dom. 8/23

5:15 am-6:27 pm

1 stop10h 12m

$417

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 $388.

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 $476 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 $325 on momondo.

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

As of July 2026, prices for Portland, Maine to Seattle flights are approximately 28% 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 02m

Direct flights

None
The fastest flight from Portland, Maine to Seattle takes 8h 02m
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 02m, 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
7.8
8,476 reviews
Search Delta flights
JetBluePriceFrom $207Free CancellationRating
7.1
3,012 reviews
Search JetBlue flights
American AirlinesPriceFrom $285Free CancellationRating
7.1
11,826 reviews
Search American Airlines flights
United AirlinesPriceFrom $296Free CancellationRating
7.4
10,014 reviews
Search United Airlines flights
SouthwestPriceFrom $405Free CancellationRating
8.0
4,241 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
Tukwila
Puyallup
Fife
Federal Way
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

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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