$123+ 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 10/27. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SEA
Sep 16 — Sep 231
Round-trip
1 adult, Economy
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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
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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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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 August 17, 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 August 17, 2026.
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:30 am -
1 stop9h 10m
Mon 10/512:49 pm -
1 stop7h 47m
Deal found 8/13![American Airlines logo]()
$278
This Southwest deal was found by Cheapflights users on 8/12. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:45 pm -
2 stops13h 45m
Mon 12/76:30 pm -
2 stops12h 20m
Deal found 8/12![Southwest logo]()
$282
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:38 pm -
1 stop9h 44m
Tue 9/1511:57 pm -
1 stop10h 08m
Deal found 8/13![American Airlines logo]()
$291
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/212:50 pm -
1 stop10h 30m
Mon 12/711:34 pm -
1 stop8h 54m
Deal found 8/12![American Airlines logo]()
$292
This Delta deal was found by Cheapflights users on 8/13. 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.
Wed 9/94:20 pm -
1 stop10h 00m
Tue 9/159:43 am -
2 stops10h 45m
Deal found 8/13![Delta logo]()
$296
This Delta deal was found by Cheapflights users on 8/12. 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.
Sat 9/192:35 pm -
1 stop11h 45m
Mon 9/2811:59 pm -
1 stop7h 46m
Deal found 8/12![Delta logo]()
$302
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:30 am -
1 stop9h 10m
Wed 9/308:20 am -
1 stop8h 18m
Deal found 8/13![American Airlines logo]()
$310
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am -
1 stop8h 50m
Fri 9/1112:40 pm -
1 stop7h 56m
Deal found 8/13![American Airlines logo]()
$330
This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:38 pm -
1 stop9h 33m
Sat 9/1911:57 pm -
1 stop10h 08m
Deal found 8/14![American Airlines logo]()
$337
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/164:40 pm -
1 stop9h 19m
Mon 10/1910:48 pm -
1 stop9h 24m
Deal found 8/12![American Airlines logo]()
$338
This Delta deal was found by Cheapflights users on 8/13. 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 10/24:20 pm -
1 stop10h 00m
Mon 10/511:59 pm -
2 stops8h 58m
Deal found 8/13![Delta logo]()
$340
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 August 17, 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 August 17, 2026.
This Delta deal was found by Cheapflights users on 8/12. 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.
Fri 10/164:15 pm -
1 stop9h 49m
Mon 10/1911:10 pm -
2 stops11h 02m
Deal found 8/12![Delta logo]()
$343
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/25:08 pm -
1 stop8h 48m
Mon 10/511:14 pm -
2 stops11h 37m
Deal found 8/13![United Airlines logo]()
$393
This Delta deal was found by Cheapflights users on 8/16. 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.
Fri 11/64:47 pm -
1 stop8h 18m
Mon 11/96:00 am -
1 stop6h 58m
Deal found 8/16![Delta logo]()
$353
This Delta deal was found by Cheapflights users on 8/14. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/164:40 pm -
1 stop8h 25m
Sat 11/2111:47 pm -
2 stops9h 21m
Deal found 8/14![Delta logo]()
$361
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/167:58 am -
2 stops15h 39m
Mon 10/1910:48 pm -
2 stops12h 50m
Deal found 8/13![United Airlines logo]()
$398
This United Airlines deal was found by Cheapflights users on 8/15. 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.
Sat 10/36:00 am -
1 stop8h 27m
Sun 10/117:00 am -
1 stop10h 22m
Deal found 8/15![United Airlines logo]()
$400
This Delta deal was found by Cheapflights users on 8/12. 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 9/12:53 pm -
1 stop11h 27m
Sat 9/126:00 am -
2 stops12h 15m
Deal found 8/12![Delta logo]()
$375
This United Airlines deal was found by Cheapflights users on 8/15. 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.
Sat 10/35:08 pm -
1 stop8h 48m
Sat 10/1010:48 pm -
1 stop7h 20m
Deal found 8/15![United Airlines logo]()
$447
Last-minute flights from Portland to SeattleDiscover last-minute flight deals from Portland to Seattle. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Seattle. Data last updated August 17, 2026 and is based on user searches.
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/16:00 am -
1 stop8h 50m
Fri 9/1112:40 pm -
1 stop7h 56m
Deal found 8/13![American Airlines logo]()
$330
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/18:00 am -
1 stop9h 56m
Wed 9/910:59 am -
1 stop9h 48m
Deal found 8/13![American Airlines logo]()
$349
This Delta deal was found by Cheapflights users on 8/13. 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.
Tue 9/111:01 am -
2 stops14h 04m
Fri 9/1111:59 pm -
1 stop7h 46m
Deal found 8/13![Delta logo]()
$360
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/54:07 pm -
1 stop11h 06m
Sun 9/1311:57 pm -
1 stop10h 08m
Deal found 8/12![American Airlines logo]()
$354
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:38 pm -
1 stop9h 44m
Tue 9/1511:57 pm -
1 stop10h 08m
Deal found 8/13![American Airlines logo]()
$291
This Delta deal was found by Cheapflights users on 8/13. 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.
Wed 9/94:20 pm -
1 stop10h 00m
Tue 9/159:43 am -
2 stops10h 45m
Deal found 8/13![Delta logo]()
$296
This Southwest deal was found by Cheapflights users on 8/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/95:45 am -
2 stops12h 15m
Tue 9/156:40 pm -
2 stops12h 15m
Deal found 8/13![Southwest logo]()
$347
This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/105:38 pm -
1 stop9h 33m
Sat 9/1911:57 pm -
1 stop10h 08m
Deal found 8/14![American Airlines logo]()
$337
This Delta deal was found by Cheapflights users on 8/12. 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.
Sat 9/192:35 pm -
1 stop11h 45m
Mon 9/2811:59 pm -
1 stop7h 46m
Deal found 8/12![Delta logo]()
$302
This American Airlines deal was found by Cheapflights users on 8/16. 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.
Sat 9/195:30 am -
1 stop9h 10m
Tue 9/2910:59 am -
1 stop9h 48m
Deal found 8/16![American Airlines logo]()
$356
This American Airlines deal was found by Cheapflights users on 8/13. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/225:30 am -
1 stop9h 10m
Wed 9/308:20 am -
1 stop8h 18m
Deal found 8/13![American Airlines logo]()
$310
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 August 17, 2026.
Search for one-way flight options from Portland to Seattle. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This Delta deal was found by Cheapflights users on 8/13. 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.
Tue 10/274:15 pm -
1 stop9h 49m
Deal found 8/13![Delta logo]()
$123
This Delta deal was found by Cheapflights users on 8/15. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/204:15 pm -
1 stop9h 49m
Deal found 8/15![Delta logo]()
$169
This United Airlines deal was found by Cheapflights users on 8/15. 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.
Tue 10/206:00 am -
2 stops12h 51m
Deal found 8/15![United Airlines logo]()
$174
This Delta deal was found by Cheapflights users on 8/13. 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.
Wed 9/26:05 am -
1 stop11h 40m
Deal found 8/13![Delta logo]()
$175
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/23:53 pm -
3 stops44h 58m
Deal found 8/13![Multiple Airlines logo]()
$177
This United Airlines deal was found by Cheapflights users on 8/13. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:40 am -
2 stops11h 12m
Deal found 8/13![United Airlines logo]()
$180
This United Airlines deal was found by Cheapflights users on 8/12. 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 10/65:15 am -
2 stops12h 02m
Deal found 8/12![United Airlines logo]()
$183
This American Airlines deal was found by Cheapflights users on 8/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/305:45 pm -
1 stop9h 51m
Deal found 8/14![American Airlines logo]()
$185
This American Airlines deal was found by Cheapflights users on 8/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/64:40 pm -
1 stop9h 19m
Deal found 8/12![American Airlines logo]()
$188
This Southwest deal was found by Cheapflights users on 8/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/303:25 pm -
2 stops12h 10m
Deal found 8/14![Southwest logo]()
$190
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/317:00 am -
2 stops29h 19m
Deal found 8/13![Multiple Airlines logo]()
$192
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 August 17, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $278 (American Airlines) |
One-way from | $123 (Delta) |
Popular in | June |
Cheapest in | November |
Average price | $681 |
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 August 17, 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
Fri 10/16
4:15 pm-11:04 pm
1 stop9h 49m
Seattle/Tacoma Intl
Mon 10/19
11:10 pm-1:12 pm
2 stops11h 02m
$343
Quickest round-trip
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Fri 11/6
4:47 pm-10:05 pm
1 stop8h 18m
Seattle/Tacoma Intl
Mon 11/9
6:00 am-3:58 pm
1 stop6h 58m
$353
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Mon 11/16
4:40 pm-10:05 pm
1 stop8h 25m
Seattle/Tacoma Intl
Sat 11/21
11:47 pm-12:08 pm
2 stops9h 21m
$361
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Tue 9/1
2:53 pm-11:20 pm
1 stop11h 27m
Seattle/Tacoma Intl
Sat 9/12
6:00 am-9:15 pm
2 stops12h 15m
$375
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Fri 10/2
5:08 pm-10:56 pm
1 stop8h 48m
Seattle/Tacoma Intl
Mon 10/5
11:14 pm-1:51 pm
2 stops11h 37m
$393
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Fri 10/16
7:58 am-8:37 pm
2 stops15h 39m
Seattle/Tacoma Intl
Mon 10/19
10:48 pm-2:38 pm
2 stops12h 50m
$398
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Sat 10/3
6:00 am-11:27 am
1 stop8h 27m
Seattle/Tacoma Intl
Sun 10/11
7:00 am-8:22 pm
1 stop10h 22m
$400
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Sat 10/3
5:08 pm-10:56 pm
1 stop8h 48m
Seattle/Tacoma Intl
Sat 10/10
10:48 pm-9:08 am
1 stop7h 20m
$447
Cheapest one-way
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Thu 10/29
6:01 am-2:50 pm
2 stops11h 49m
$128
PortlandSeattle
PWM Portland - SEA Seattle/Tacoma Intl
PWMSEA
Portland
Sat 10/31
12:43 pm-10:05 pm
2 stops12h 22m
$128
Showing 1-10 of 19 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 August.
| 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 39 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 $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 $554 and $744 in October.The cheapest round-trip price found within the last 5 days was $278 on American Airlines (Oct 2-Oct 5).
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 August 17, 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
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Overall
8.0
Comfort
8.0
Entertainment
7.5
Boarding
8.1
Crew
8.6
Food
7.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
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
Olympia
Tukwila
Edmonds
Snoqualmie
Lynnwood
Tumwater
Centralia
Puyallup
Marysville
Kent
Ellensburg
Fife
Ocean Shores
Lakewood
Poulsbo
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Portland and Seattle flights
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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 August 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$408 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$207 | Average$295 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$285 | Average$524 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$450 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$405 | Average$534 | FlexibilityNo cancel fee | On-time63% |