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$134+ Cheap flights from Portland, ME to Seattle (PWM - SEA)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SEA
May 23 — May 301
Sat 5/23
Sat 5/30
1 adult, Economy
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Cheap flight deals from Portland to Seattle

Cheapest flights from Portland to Seattle
Explore the most affordable flight options available from Portland to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 23, 2026.

This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/284:48 pm
PWM
-
SEA
1 stop9h 00m
Delta
Tue 6/211:05 pm
SEA
-
PWM
1 stop9h 50m
Delta
Deal found 4/20$246
This American Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/25:36 pm
PWM
-
SEA
1 stop10h 23m
American Airlines
Fri 6/510:35 pm
SEA
-
PWM
1 stop9h 02m
American Airlines
Deal found 4/21$268
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/412:50 pm
PWM
-
SEA
2 stops14h 20m
Delta
Mon 6/811:59 pm
SEA
-
PWM
1 stop7h 44m
Delta
Deal found 4/21$272
This Delta deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/22:38 pm
PWM
-
SEA
1 stop11h 07m
Delta
Fri 6/55:30 am
SEA
-
PWM
2 stops14h 39m
Delta
Deal found 4/21$273
This United Airlines deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:05 pm
PWM
-
SEA
1 stop8h 37m
United Airlines
Wed 9/210:47 pm
SEA
-
PWM
1 stop8h 25m
United Airlines
Deal found 4/22$280
This American Airlines deal was found by Cheapflights users on 4/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/66:00 am
PWM
-
SEA
1 stop8h 34m
American Airlines
Tue 5/121:19 pm
SEA
-
PWM
1 stop7h 58m
American Airlines
Deal found 4/21$283
This Delta deal was found by Cheapflights users on 4/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/292:38 pm
PWM
-
SEA
1 stop11h 07m
Delta
Thu 6/45:30 am
SEA
-
PWM
2 stops14h 39m
Delta
Deal found 4/20$294
This Southwest deal was found by Cheapflights users on 4/22. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/255:45 am
PWM
-
SEA
2 stops12h 15m
Southwest
Wed 9/25:20 am
SEA
-
PWM
1 stop13h 45m
Southwest
Deal found 4/22$295
This American Airlines deal was found by Cheapflights users on 4/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/36:00 am
PWM
-
SEA
1 stop8h 34m
American Airlines
Tue 5/1212:34 pm
SEA
-
PWM
1 stop7h 52m
American Airlines
Deal found 4/19$316

Find flight deals from Portland to Seattle

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PWM) to Seattle (SEA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$246
(Delta)

One-way from

$134
(United Airlines)

Popular in

June

Cheapest in

November

Average price

$405
Provider with most accurate pricing for Portland-Seattle/Tacoma Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Seattle/Tacoma Intl flights.
Search Deals
From Portland to Seattle/Tacoma Intl
Search Deals
One-way flight from Portland to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 9% potential increase in price ($45 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland 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, Cheapflights users made 2,558,603 searches. Data last updated April 23, 2026.
Use the filters below to find and compare flights from Portland to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sat 5/9

9:40 am-6:32 pm

2 stops11h 52m

Seattle/Tacoma Intl

Sat 5/9

10:41 pm-10:18 am

1 stop8h 37m

$365

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 6/3

12:50 pm-12:10 am

2 stops14h 20m

Seattle/Tacoma Intl

Wed 6/10

11:40 am-12:52 am

1 stop10h 12m

$415

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 5/19

12:50 pm-10:03 pm

2 stops12h 13m

Seattle/Tacoma Intl

Tue 5/26

11:59 pm-11:55 am

2 stops8h 56m

$420

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 9/1

5:15 am-2:22 pm

2 stops12h 07m

Seattle/Tacoma Intl

Thu 9/10

10:47 pm-10:12 am

1 stop8h 25m

$422

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 9/1

6:00 am-7:07 pm

2 stops16h 07m

Seattle/Tacoma Intl

Sat 9/12

10:47 pm-10:12 am

1 stop8h 25m

$423
Quickest round-trip

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 5/20

6:00 am-11:39 am

1 stop8h 39m

Seattle/Tacoma Intl

Wed 5/27

8:00 am-7:27 pm

1 stop8h 27m

$428

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sat 10/10

6:30 am-2:25 pm

1 stop10h 55m

Seattle/Tacoma Intl

Tue 10/13

11:05 pm-1:22 pm

2 stops11h 17m

$475

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Fri 9/18

10:43 am-6:15 pm

1 stop10h 32m

Seattle/Tacoma Intl

Wed 9/23

7:06 am-11:59 pm

2 stops13h 53m

$509

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 9/1

3:06 pm-8:58 pm

1 stop8h 52m

Seattle/Tacoma Intl

Fri 9/11

11:38 am-11:41 pm

2 stops33h 03m

$520

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 9/3

4:50 pm-12:01 am

2 stops10h 11m

Seattle/Tacoma Intl

Mon 9/7

6:00 am-10:33 pm

2 stops13h 33m

$609

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/21

Showing 1-10 of 22 resultsSorted by cheapest first
1
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3

Compare providers for flights from Portland to Seattle

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Seattle in April.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
PricelinePrice Accuracy1 starTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland, Maine-Seattle flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Portland, Maine-Seattle flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Portland, Maine-Seattle flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland, Maine-Seattle flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland, Maine-Seattle flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Seattle

How far ahead should I book a flight from Portland, Maine to Seattle?

Use this chart to determine the optimal time to book a round-trip flight from Portland to Seattle. Price data was last updated on April 17, 2026.

The price you pay for your flight from Portland, Maine to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 2 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Portland, Maine to Seattle?

Currently, November is the cheapest month in which you can book a flight from Portland, Maine to Seattle (average of $375). Flying from Portland, Maine to Seattle in June is currently the most expensive (average of $588). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How much does it cost to fly round-trip from Portland, Maine to Seattle?

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Seattle. Reviews last updated April 23, 2026.
See what other customers who have flown with Southwest,Delta, andUnited Airlines from Portland to Seattle have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,327 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Southwest
8.0
Very good
4,327 reviews
Southwest
8.0
Very good
4,327 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Delta
7.9
Good
8,435 reviews
Southwest
8.0
Very good
4,327 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
United Airlines
7.4
Good
9,635 reviews
Southwest
8.0
Very good
4,327 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
American Airlines
7.1
Good
11,655 reviews
Southwest
8.0
Very good
4,327 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.
Sun Country Air
6.8
Okay
337 reviews
Southwest
8.0
Very good
4,327 reviews

Food

7.0

Overall

8.0

Crew

8.6

Boarding

8.1

Comfort

8.0

Entertainment

7.5

Reviews

1 / 20
2.0
Mediocre

Dominic,Mar 2026

MCO - SMF

I had to try and sleep on the floor of the Austin airport. I spent 12 hours there. The airline policies were so poor, that a near violent argument broke out between the people in front of me and the flight attendants - making for a super stressful situation at 30,000 feet. Garbage airline choice by Kayak Garbage idea to book a flight with a layover. Next time I will pay for a quality booking myself, and somehow force the company to reimburse it.

Related info for your journey

Find useful and relevant information for your journey from Portland to Seattle. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Portland, Maine to Seattle?

    Airlines like United Airlines and Delta fly from Portland, Maine to Seattle in about 11h 52m. The time it takes to get you to your destination can typically vary by up to 2h 28m. Airlines will cover a distance of 2481 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines flying from Portland, Maine to Seattle round-trip?

    Currently priced at $155, Delta will fly you from Portland, Maine to Seattle and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Sun Country Air and United Airlines - these airlines can fly you to your destination from $168 and $275, respectively. Delta is currently priced 64% below the average price you’ll pay for this route.

  • What are the cheapest airlines to fly from Portland, Maine to Seattle one-way?

    The cheapest airline one-way is American Airlines, with whom users have recently found tickets for as low as $120. However, be on the lookout for offers from United Airlines and Delta, as they are both options that can get you from Portland, Maine to Seattle for a low price.

  • Can I find deals for flights from Portland to Seattle that include hotel bookings?

    Yes. In addition to deals on Portland to Seattle flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Seattle?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Seattle.

  • Can I find deals for business class flights from Portland to Seattle?

    Yes. Cheapflights offers flight deals from Portland to Seattle by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Portland, Maine to Seattle?

    Currently, November is the cheapest month in which you can book a flight from Portland, Maine to Seattle (average of $375). Flying from Portland, Maine to Seattle in June is currently the most expensive (average of $588). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Tacoma
Ocean Shores
Olympia
Lynnwood
Lacey
Edmonds
Leavenworth
Snoqualmie
Kent
Tumwater
Tukwila
Puyallup
Renton
Kirkland
Ellensburg
Fife
Lakewood
Issaquah
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 5 airlines flying from Portland to Seattle

Discover the top 5 airlines that operate flights from Portland to Seattle. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$155Average$399FlexibilityNo cancel feeOn-timeN/A
Sun Country AirCheapest$168Average$416FlexibilityNo cancel feeOn-time83%
United AirlinesCheapest$275Average$444FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$285Average$453FlexibilityNo cancel feeOn-time71%
SouthwestCheapest$418Average$520FlexibilityNo cancel feeOn-time63%

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