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$169+ 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 4/23. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SEA
Mar 31 — Apr 71
Mon 3/31
Mon 4/7
1 adult, Economy
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Cheapflights Tip: The best prices from Portland to Seattle/Tacoma Intl are usually found in September or January, booked 80 days in advance, depart on a Tuesday or Thursday and return on a Tuesday

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 March 26, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$337
(Delta)

One-way from

$169
(Delta)

Popular in

March

Cheapest in

September

Average price

$675
Provider with most accurate pricing for Portland-Seattle/Tacoma Intl flight deals.
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Provider most trusted by Cheapflights users for Portland-Seattle/Tacoma Intl flights.
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From Portland to Seattle/Tacoma Intl
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One-way flight from Portland to Seattle/Tacoma Intl
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Highest demand for flights based on searches. 6% potential increase in price ($37 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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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 March 26, 2025.

This American Airlines deal was found by Cheapflights users on 3/25. 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.
Sat 4/264:15 pmPWM - SEA
1 stop8h 44mAmerican Airlines
Mon 5/511:59 pmSEA - PWM
1 stop8h 33mAmerican Airlines
Deal found 3/25$337
This JetBlue deal was found by Cheapflights users on 3/23. 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 JetBlue is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/22:15 pmPWM - SEA
1 stop10h 57mJetBlue
Mon 10/611:45 pmSEA - PWM
1 stop10h 31mJetBlue
Deal found 3/23$344
This Delta deal was found by Cheapflights users on 3/24. 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.
Sat 4/261:00 pmPWM - SEA
2 stops13h 10mDelta
Mon 5/510:30 pmSEA - PWM
2 stops10h 37mDelta
Deal found 3/24$372
This Southwest deal was found by Cheapflights users on 3/24. 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.
Wed 5/2812:30 pmPWM - SEA
2 stops12h 50mSouthwest
Wed 6/45:10 pmSEA - PWM
2 stops14h 30mSouthwest
Deal found 3/24$407
This United deal was found by Cheapflights users on 3/25. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/266:15 amPWM - SEA
2 stops15h 46mUnited Airlines
Mon 5/57:00 amSEA - PWM
3 stops13h 59mUnited Airlines
Deal found 3/25$452
This Booking.com deal was found by Cheapflights users on 3/25. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/1912:32 pmPWM - SEA
1 stop13h 18mSun Country Air
Sat 7/2611:59 pmSEA - PWM
1 stop8h 36mSun Country Air
Deal found 3/25$465
This Mytrip deal was found by Cheapflights users on 3/25. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/1911:48 amPWM - SEA
2 stops39h 22mMultiple Airlines
Wed 5/216:33 pmSEA - PWM
1 stop14h 08mMultiple Airlines
Deal found 3/25$564
This Alaska Airlines deal was found by Cheapflights users on 3/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/22:07 pmPWM - SEA
2 stops11h 54mAlaska Airlines
Mon 10/66:00 amSEA - PWM
2 stops14h 40mAlaska Airlines
Deal found 3/23$789

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 March 26, 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

Tue 6/3

5:00 pm-10:23 pm

1 stop8h 23m

Seattle/Tacoma Intl

Thu 6/12

11:59 pm-10:39 am

1 stop7h 40m

$337

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 6/3

4:01 pm-9:50 pm

1 stop8h 49m

Seattle/Tacoma Intl

Sat 6/14

12:12 pm-11:01 pm

1 stop7h 49m

$347

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 4/23

6:15 am-3:58 pm

2 stops12h 43m

Seattle/Tacoma Intl

Wed 4/30

11:45 pm-11:02 am

1 stop8h 17m

$352

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 6/17

2:20 pm-8:33 pm

1 stop9h 13m

Seattle/Tacoma Intl

Mon 6/23

11:25 pm-1:23 pm

1 stop10h 58m

$395

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Thu 6/5

3:40 pm-12:25 am

2 stops11h 45m

Seattle/Tacoma Intl

Tue 6/10

10:55 pm-3:25 pm

2 stops13h 30m

$407

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Fri 7/11

12:32 pm-10:50 pm

1 stop13h 18m

Seattle/Tacoma Intl

Sat 7/19

6:40 pm-11:35 am

1 stop13h 55m

$440

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Fri 7/11

12:32 pm-10:50 pm

1 stop13h 18m

Seattle/Tacoma Intl

Sat 7/19

1:37 pm-11:35 am

2 stops18h 58m

$501

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Wed 4/23

2:59 pm-10:44 pm

1 stop10h 45m

$169

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Tue 6/24

6:33 pm-12:44 am

1 stop9h 11m

$179

PortlandSeattle

PWM - SEA

PWMSEA

Portland

Sun 7/13

12:32 pm-10:50 pm

1 stop13h 18m

$208

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/25

Showing 1-10 of 13 results
1
2

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 March.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
eDreamsPrice Accuracy3 starsTrust 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 March 21, 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 80 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 $238). Flying from Portland, Maine to Seattle in July is currently the most expensive (average of $411). 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 March 26, 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 17% versus a flight in the evening.

Rainfall in Seattle by month

Plan your trip to Seattle by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Seattle ranges from 0.7 - 6.6 inches per month. November is typically the wettest month, when rainfall can reach 6.6 in. July is typically the driest time to visit Seattle when rainfall is around 0.7 in.

Temperature in Seattle by month

Plan your trip to Seattle by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Seattle, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 66.2 F. Travelers looking to avoid the cold should look outside of December, when temperatures are typically at their lowest (around 41.0 F).

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 March 26, 2025.
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,789 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,891 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,608 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
JetBlue
7.3
Good
2,922 reviews
Southwest
8.1
Very good
4,273 reviews

Crew

8.6

Overall

8.1

Boarding

8.2

Entertainment

7.6

Food

7.1

Comfort

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

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

    Currently priced at $337, 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 American Airlines and United Airlines - these airlines can fly you to your destination from $347 and $352, respectively. Delta is currently priced 36% 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 Delta, with whom users have recently found tickets for as low as $169. However, be on the lookout for offers from United Airlines and American Airlines, 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, January is the cheapest month in which you can book a flight from Portland, Maine to Seattle (average of $238). Flying from Portland, Maine to Seattle in July is currently the most expensive (average of $411). 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 Portland?

Book flights to Portland if you plan to visit one of these locations
SeaTac
Tukwila
Tacoma
Lakewood
Renton
Lacey
Ocean Shores
Leavenworth
Federal Way
Olympia
Cle Elum
Centralia
Mukilteo
Aberdeen
Shoreline
Lynnwood
Shelton
Silverdale
Redmond
Monroe

Browse thousands of different options on Cheapflights for your next trip

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Top 7 airlines flying from Portland to Seattle

Discover the top 7 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 March 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
JetBlueCheapest$240Average$324FlexibilityNo cancel feeOn-time62%
DeltaCheapest$270Average$513FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$278Average$543FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$318Average$728FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$336Average$592FlexibilityNo cancel feeOn-time69%
Sun Country AirCheapest$365Average$470FlexibilityNo cancel feeOn-time83%
SouthwestCheapest$397Average$542FlexibilityNo cancel feeOn-time63%
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