$129+ Cheap flights from Portland, ME to Seattle (PWM - SEA)
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SEA
Nov 18 — Nov 251
Round-trip
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”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Portland to Seattle
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Last-minute
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Cheapest flights from Portland to SeattleExplore 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 19, 2026.
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 19, 2026.
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:03 pm -
1 stop9h 57m
Thu 11/1911:45 am -
1 stop9h 34m
Deal found 10/19![Delta logo]()
$257
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/812:49 pm -
1 stop8h 54m
Mon 12/1411:15 pm -
1 stop9h 42m
Deal found 10/19![Delta logo]()
$283
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:03 pm -
1 stop9h 57m
Sat 11/1411:45 am -
1 stop9h 34m
Deal found 10/19![Delta logo]()
$373
This Southwest deal was found by Cheapflights users on 10/18. 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 12/912:45 pm -
2 stops13h 50m
Wed 12/166:30 pm -
2 stops13h 00m
Deal found 10/18![Southwest logo]()
$405
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Wed 11/113:40 pm -
1 stop8h 59m
Sat 11/147:00 am -
1 stop8h 49m
Deal found 10/15![United Airlines logo]()
$412
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Mon 11/93:41 pm -
1 stop8h 58m
Sat 11/1410:56 pm -
2 stops12h 31m
Deal found 10/15![United Airlines logo]()
$417
Best flights from Portland to SeattleDiscover carefully curated flight deals from Portland to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 19, 2026.
Discover carefully curated flight deals from Portland to Seattle that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 19, 2026.
This Southwest deal was found by Cheapflights users on 10/18. 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 12/212:45 pm -
2 stops13h 05m
Thu 12/105:40 am -
2 stops13h 10m
Deal found 10/18![Southwest logo]()
$449
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/156:00 am -
2 stops11h 43m
Tue 1/1911:05 pm -
1 stop9h 48m
Deal found 10/19![Delta logo]()
$472
This United Airlines deal was found by Cheapflights users on 10/14. 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.
Fri 11/133:23 pm -
1 stop10h 52m
Sat 11/2110:56 pm -
2 stops12h 31m
Deal found 10/14![United Airlines logo]()
$525
This Southwest deal was found by Cheapflights users on 10/16. 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.
Sat 11/141:00 pm -
2 stops11h 55m
Sat 11/215:30 pm -
2 stops14h 00m
Deal found 10/16![Southwest logo]()
$509
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Wed 11/115:30 am -
2 stops12h 09m
Sat 11/1410:56 pm -
2 stops12h 31m
Deal found 10/15![United Airlines logo]()
$553
Last-minute flights from Portland to SeattleDiscover last-minute flight deals from Portland to Seattle. Data last updated October 19, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Seattle. Data last updated October 19, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Mon 11/93:41 pm -
1 stop8h 58m
Sat 11/1410:56 pm -
2 stops12h 31m
Deal found 10/15![United Airlines logo]()
$417
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/114:03 pm -
1 stop9h 57m
Sat 11/1411:45 am -
1 stop9h 34m
Deal found 10/19![Delta logo]()
$373
This United Airlines deal was found by Cheapflights users on 10/15. 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.
Wed 11/113:40 pm -
1 stop8h 59m
Sat 11/147:00 am -
1 stop8h 49m
Deal found 10/15![United Airlines logo]()
$412
This Southwest deal was found by Cheapflights users on 10/15. 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 11/1112:45 pm -
2 stops13h 05m
Fri 11/1312:15 am -
2 stops11h 30m
Deal found 10/15![Southwest logo]()
$422
This American Airlines deal was found by Cheapflights users on 10/16. 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 11/1112:50 pm -
1 stop10h 30m
Sat 11/1411:34 pm -
1 stop9h 01m
Deal found 10/16![American Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:03 pm -
1 stop9h 57m
Thu 11/1911:45 am -
1 stop9h 34m
Deal found 10/19![Delta logo]()
$257
One-way flights from Portland to SeattleSearch for one-way flight options from Portland to Seattle. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.
Search for one-way flight options from Portland to Seattle. Find affordable one-way fares based on user searches. Data last updated October 19, 2026.
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/156:00 am -
1 stop11h 34m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Delta logo]()
$129
This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1712:45 pm -
2 stops13h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Southwest logo]()
$134
This Delta deal was found by Cheapflights users on 10/19. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/144:00 pm -
1 stop10h 09m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Delta logo]()
$155
This Delta deal was found by Cheapflights users on 10/16. 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 11/1712:45 pm -
1 stop8h 52m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![Delta logo]()
$198
This United Airlines deal was found by Cheapflights users on 10/16. 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.
Sun 11/155:08 pm -
1 stop8h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![United Airlines logo]()
$237
This American Airlines deal was found by Cheapflights users on 10/16. 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.
Thu 12/175:25 am -
1 stop9h 17m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/16![American Airlines logo]()
$242
This Southwest deal was found by Cheapflights users on 10/19. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/171:40 pm -
2 stops13h 55m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![Southwest logo]()
$247
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 October 19, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $257 (Delta) |
One-way from | $129 (Delta) |
Popular in | June |
Cheapest in | May |
Average price | $433 |
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 7,457,451 searches. Data last updated October 19, 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
Cheapest round-trip
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Tue 11/17
12:45 pm-11:35 pm
2 stops13h 50m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$134
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Tue 12/15
12:49 pm-12:05 am
2 stops14h 16m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$134
Quickest round-trip
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Wed 11/18
4:50 pm-9:58 pm
1 stop8h 08m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$198
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Tue 11/17
12:45 pm-6:37 pm
1 stop8h 52m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$198
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Mon 12/14
4:00 pm-11:09 pm
1 stop10h 09m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$215
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Tue 12/15
6:00 am-9:01 pm
3 stops18h 01m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$273
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Tue 11/17
5:30 am-8:47 pm
3 stops18h 17m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$273
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Sat 10/24
10:43 am-6:19 pm
1 stop10h 36m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$295
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Mon 11/16
4:50 pm-11:57 pm
2 stops10h 07m
Seattle/Tacoma Intl
Wed 12/31
12:00 am-3:00 am
Nonstop0h 00m
$300
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Wed 12/2
12:45 pm-10:50 pm
2 stops13h 05m
Seattle/Tacoma Intl
Thu 12/10
5:40 am-9:50 pm
2 stops13h 10m
$449
Showing 1-10 of 14 resultsSorted by cheapest first
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.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- 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.
PWM-SEA
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?
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 9 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, May is the cheapest month in which you can book a flight from Portland, Maine to Seattle (average of $379). Flying from Portland, Maine to Seattle in June is currently the most expensive (average of $681). 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?
Airfare is below average for this route at the moment.
Portland, Maine to Seattle flights typically cost between $380 and $568 in November.The cheapest round-trip price found within the last 5 days was $257 on Delta (Nov 16-Nov 19).
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 19, 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.
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Entertainment
7.5
Crew
8.6
Boarding
8.1
Comfort
8.0
Food
7.0
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
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.
Traveling to a place near Seattle?
Book flights to Seattle if you plan to visit one of these locationsSeaTac
Renton
Tacoma
Lacey
Leavenworth
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Tukwila
Snoqualmie
Puyallup
Lynnwood
Centralia
Kent
Tumwater
Ocean Shores
Ellensburg
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Shoreline
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Portland and Seattle flights
Browse other Portland and Seattle flight options. Last updated on October 19, 2026.
Other flights from Portland
Browse through other flights departing from Portland. Flights are based on user searches made on Cheapflights and were last updated on October 19, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Other flights to Seattle
Explore flights to Seattle departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on October 19, 2026.
Top 4 airlines flying from Portland to Seattle
Discover the top 4 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 7,457,451 searches. Data last updated October 19, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$386 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$285 | Average$519 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$300 | Average$459 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$405 | Average$534 | FlexibilityNo cancel fee | On-time63% |