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$111+ 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 10/22. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SEA
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
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Find cheap flights from Portland to Seattle with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

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3. Compare prices and book

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Cheapflights Tip: The best prices from Portland to Seattle/Tacoma Intl are usually found in January or September, booked 86 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

Find 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 October 14, 2025.

This Delta deal was found by Cheapflights users on 10/13. 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 10/246:00 amPWM - SEA
1 stop9h 27mDelta
Sun 10/2611:55 pmSEA - PWM
1 stop7h 41mDelta
Deal found 10/13$221
This Delta deal was found by Cheapflights users on 10/12. 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.
Wed 11/54:48 pmPWM - SEA
1 stop8h 15mDelta
Wed 11/1211:55 pmSEA - PWM
2 stops13h 12mDelta
Deal found 10/12$226
This Delta deal was found by Cheapflights users on 10/12. 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 11/41:46 pmPWM - SEA
2 stops11h 17mDelta
Sat 11/86:00 amSEA - PWM
2 stops15h 05mDelta
Deal found 10/12$231
This United Airlines deal was found by Cheapflights users on 10/12. 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 11/46:00 amPWM - SEA
1 stop9h 34mUnited Airlines
Tue 11/1110:53 amSEA - PWM
2 stops9h 24mUnited Airlines
Deal found 10/12$256
This United Airlines deal was found by Cheapflights users on 10/12. 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.
Thu 11/65:00 pmPWM - SEA
1 stop8h 28mUnited Airlines
Sat 11/85:05 amSEA - PWM
1 stop7h 43mUnited Airlines
Deal found 10/12$263
This Delta deal was found by Cheapflights users on 10/12. 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 11/44:48 pmPWM - SEA
1 stop8h 15mDelta
Wed 11/1211:10 pmSEA - PWM
1 stop9h 58mDelta
Deal found 10/12$266
This Delta deal was found by Cheapflights users on 10/12. 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 10/236:00 amPWM - SEA
1 stop9h 27mDelta
Wed 10/296:00 amSEA - PWM
2 stops13h 19mDelta
Deal found 10/12$271
This Delta deal was found by Cheapflights users on 10/12. 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.
Wed 11/54:48 pmPWM - SEA
1 stop8h 15mDelta
Tue 11/1111:10 pmSEA - PWM
1 stop9h 58mDelta
Deal found 10/12$300
This Delta deal was found by Cheapflights users on 10/12. 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.
Wed 11/54:48 pmPWM - SEA
1 stop8h 15mDelta
Sun 11/910:48 pmSEA - PWM
1 stop22h 06mDelta
Deal found 10/12$302
This Delta deal was found by Cheapflights users on 10/12. 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.
Wed 11/51:46 pmPWM - SEA
2 stops11h 17mDelta
Thu 11/136:00 amSEA - PWM
1 stop7h 07mDelta
Deal found 10/12$305
This Delta deal was found by Cheapflights users on 10/12. 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 11/41:46 pmPWM - SEA
2 stops11h 17mDelta
Sun 11/910:48 pmSEA - PWM
1 stop22h 06mDelta
Deal found 10/12$307

Cheap 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 October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$221
(Delta)

One-way from

$111
(American Airlines)

Popular in

March

Cheapest in

January

Average price

$526
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. 6% potential increase in price ($34 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 14, 2025.
Use the filters below to find and compare flights from Portland to Seattle that are best for you.

Fly from

Portland

Fly to

Seattle

Route

Depart

Return

Price

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 11/5

4:48 pm-10:03 pm

1 stop8h 15m

Seattle/Tacoma Intl

Sat 11/8

6:00 am-4:03 pm

1 stop7h 03m

$221

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Fri 10/24

3:28 pm-8:46 pm

1 stop8h 18m

Seattle/Tacoma Intl

Sat 10/25

12:34 am-1:18 pm

2 stops9h 44m

$226

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 11/5

4:48 pm-10:03 pm

1 stop8h 15m

Seattle/Tacoma Intl

Tue 11/11

11:10 pm-1:50 pm

2 stops11h 40m

$226

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 11/5

4:48 pm-10:03 pm

1 stop8h 15m

Seattle/Tacoma Intl

Fri 11/14

11:10 pm-11:27 am

2 stops9h 17m

$226

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 1/8

5:30 am-5:00 pm

2 stops14h 30m

Seattle/Tacoma Intl

Tue 1/13

6:00 am-9:59 pm

2 stops12h 59m

$231

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 11/6

5:00 pm-10:28 pm

1 stop8h 28m

Seattle/Tacoma Intl

Sat 11/8

5:05 am-3:48 pm

1 stop7h 43m

$263

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 10/23

6:00 am-12:27 pm

1 stop9h 27m

Seattle/Tacoma Intl

Sun 10/26

11:55 pm-10:36 am

1 stop7h 41m

$266

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 1/8

2:31 pm-8:57 pm

1 stop9h 26m

Seattle/Tacoma Intl

Tue 1/13

8:10 am-11:30 pm

2 stops12h 20m

$268

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 11/4

2:20 pm-8:54 pm

1 stop9h 34m

Seattle/Tacoma Intl

Tue 11/11

6:20 am-5:48 pm

1 stop8h 28m

$281

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 1/7

3:12 pm-11:15 pm

1 stop11h 03m

Seattle/Tacoma Intl

Mon 1/12

7:00 am-6:50 pm

1 stop8h 50m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/13

Showing 1-10 of 18 results
1
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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 October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice 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 October 10, 2025.

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 86 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, January is the cheapest month in which you can book a flight from Portland, Maine to Seattle (average of $98). Flying from Portland, Maine to Seattle in August is currently the most expensive (average of $178). 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.

What is the cheapest time of day to fly from PWM to SEA?

Find hourly flight availability from Portland to Seattle. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 14, 2025.

When flying from Portland, Maine to Seattle, the time of day you fly usually plays a role in the price. Save by searching for a flight in the afternoon, which can drop the price by up to 16% versus a flight in the evening.

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 October 14, 2025.
See what other customers who have flown with Delta, United Airlines, and American 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.
Delta
8.0
Very good
7,973 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
8.0
Very good
7,973 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
United Airlines
7.4
Good
8,974 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
American Airlines
7.2
Good
11,045 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
JetBlue
7.2
Good
2,904 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Sun Country Air
6.9
Okay
334 reviews
Delta
8.0
Very good
7,973 reviews

Food

7.3

Entertainment

7.9

Comfort

7.9

Boarding

8.2

Overall

8.0

Crew

8.5

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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 Delta and American Airlines fly from Portland, Maine to Seattle in about 8h 15m. The time it takes to get you to your destination can typically vary by up to 03m. 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 $240, JetBlue will fly you from Portland, Maine to Seattle and back. In addition to JetBlue, many other airlines offer competitively priced options for your trip. Search Cheapflights for deals from Sun Country Air and Delta - these airlines can fly you to your destination from $304 and $312, respectively. JetBlue is currently priced 52% below the average price you’ll pay for this route.

  • 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, January is the cheapest month in which you can book a flight from Portland, Maine to Seattle (average of $98). Flying from Portland, Maine to Seattle in August is currently the most expensive (average of $178). 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
Tukwila
Tacoma
Lakewood
Ocean Shores
Lynnwood
Edmonds
Leavenworth
Renton
Lacey
Olympia
Kent
Federal Way
Cle Elum
Puyallup
Chehalis
Kirkland
Issaquah
Aberdeen
Shoreline

Browse thousands of different options on Cheapflights for your next trip

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Top 6 airlines flying from Portland to Seattle

Discover the top 6 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 October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$240Average$240FlexibilityNo cancel feeOn-time62%
Sun Country AirCheapest$304Average$460FlexibilityNo cancel feeOn-time83%
DeltaCheapest$312Average$464FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$330Average$497FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$361Average$540FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$397Average$542FlexibilityNo cancel feeOn-time63%

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