$188+ 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 9/5. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — SEA
Sep 4 — Sep 111
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
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
Cheapest
Best
Last-minute
One-way
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 5, 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 5, 2026.
This Delta deal was found by Cheapflights users on 8/1. 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
Fri 9/1111:59 pm -
1 stop7h 46m
Deal found 8/1![Delta logo]()
$375
This Southwest deal was found by Cheapflights users on 7/31. 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
Wed 9/166:40 pm -
2 stops12h 10m
Deal found 7/31![Southwest logo]()
$385
This American Airlines deal was found by Cheapflights users on 8/4. 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 8/4![American Airlines logo]()
$393
This American Airlines deal was found by Cheapflights users on 8/3. 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 stop11h 41m
Sat 9/1211:57 pm -
1 stop10h 08m
Deal found 8/3![American Airlines logo]()
$395
This Delta deal was found by Cheapflights users on 8/4. 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 9/16:05 am -
1 stop11h 40m
Wed 9/99:43 am -
2 stops11h 13m
Deal found 8/4![Delta logo]()
$399
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/59:49 am -
2 stops12h 18m
Wed 9/910:42 am -
1 stop8h 02m
Deal found 8/1![United Airlines logo]()
$405
This Delta deal was found by Cheapflights users on 8/4. 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 8/266:05 am -
1 stop10h 35m
Sat 8/297:16 am -
1 stop11h 15m
Deal found 8/4![Delta logo]()
$413
This American Airlines deal was found by Cheapflights users on 8/2. 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 9/26:09 pm -
1 stop8h 50m
Tue 9/811:56 pm -
1 stop10h 09m
Deal found 8/2![American Airlines logo]()
$414
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 5, 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 5, 2026.
This Delta deal was found by Cheapflights users on 7/31. 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
Wed 9/1611:35 am -
1 stop8h 53m
Deal found 7/31![Delta logo]()
$375
This Southwest deal was found by Cheapflights users on 7/31. 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
Wed 9/1610:30 pm -
1 stop9h 25m
Deal found 7/31![Southwest logo]()
$380
This United Airlines deal was found by Cheapflights users on 8/2. 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 10/163:41 pm -
1 stop9h 14m
Thu 11/197:04 pm -
2 stops10h 56m
Deal found 8/2![United Airlines logo]()
$464
This Delta deal was found by Cheapflights users on 8/2. 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 8/296:05 am -
1 stop11h 40m
Tue 9/15:30 am -
1 stop7h 31m
Deal found 8/2![Delta logo]()
$394
This United Airlines deal was found by Cheapflights users on 7/31. 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 9/19:49 am -
2 stops12h 18m
Sat 9/125:20 pm -
2 stops13h 44m
Deal found 7/31![United Airlines logo]()
$505
This Delta deal was found by Cheapflights users on 8/3. 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 9/125:45 am -
2 stops12h 15m
Deal found 8/3![Delta logo]()
$486
This United Airlines deal was found by Cheapflights users on 8/4. 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 9/310:45 am -
2 stops15h 19m
Mon 9/711:04 pm -
2 stops11h 51m
Deal found 8/4![United Airlines logo]()
$533
This Delta deal was found by Cheapflights users on 8/3. 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 9/1812:55 pm -
2 stops12h 15m
Wed 9/2311:59 pm -
1 stop7h 46m
Deal found 8/3![Delta logo]()
$516
Last-minute flights from Portland to SeattleDiscover last-minute flight deals from Portland to Seattle. Data last updated August 5, 2026 and is based on user searches.
Discover last-minute flight deals from Portland to Seattle. Data last updated August 5, 2026 and is based on user searches.
This Delta deal was found by Cheapflights users on 8/4. 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 8/266:05 am -
1 stop10h 35m
Sat 8/297:16 am -
1 stop11h 15m
Deal found 8/4![Delta logo]()
$413
This Delta deal was found by Cheapflights users on 8/1. 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
Fri 9/1111:59 pm -
1 stop7h 46m
Deal found 8/1![Delta logo]()
$375
This American Airlines deal was found by Cheapflights users on 8/4. 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 8/4![American Airlines logo]()
$393
This American Airlines deal was found by Cheapflights users on 8/3. 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 stop11h 41m
Sat 9/1211:57 pm -
1 stop10h 08m
Deal found 8/3![American Airlines logo]()
$395
This Delta deal was found by Cheapflights users on 8/4. 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 9/16:30 am -
2 stops11h 04m
Wed 9/99:43 am -
2 stops11h 13m
Deal found 8/4![Delta logo]()
$404
This American Airlines deal was found by Cheapflights users on 8/2. 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 9/26:09 pm -
1 stop8h 50m
Tue 9/811:56 pm -
1 stop10h 09m
Deal found 8/2![American Airlines logo]()
$414
This United Airlines deal was found by Cheapflights users on 8/1. 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 9/59:49 am -
2 stops12h 18m
Wed 9/910:42 am -
1 stop8h 02m
Deal found 8/1![United Airlines logo]()
$405
This Southwest deal was found by Cheapflights users on 7/31. 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
Wed 9/166:40 pm -
2 stops12h 10m
Deal found 7/31![Southwest logo]()
$385
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 5, 2026.
Search for one-way flight options from Portland to Seattle. Find affordable one-way fares based on user searches. Data last updated August 5, 2026.
This Delta deal was found by Cheapflights users on 8/3. 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 9/22:53 pm -
1 stop11h 27m
Deal found 8/3![Delta logo]()
$188
This American Airlines deal was found by Cheapflights users on 8/1. 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 10/106:00 am -
1 stop9h 09m
Deal found 8/1![American Airlines logo]()
$198
This United Airlines deal was found by Cheapflights users on 8/4. 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 8/296:03 am -
1 stop8h 29m
Deal found 8/4![United Airlines logo]()
$207
This United Airlines deal was found by Cheapflights users on 8/3. 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 8/316:03 am -
2 stops12h 49m
Deal found 8/3![United Airlines logo]()
$212
This Kiwi.com deal was found by Cheapflights users on 8/1. 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.
Tue 9/18:00 am -
3 stops28h 19m
Deal found 8/1![Multiple Airlines logo]()
$214
This Kiwi.com deal was found by Cheapflights users on 8/2. 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.
Fri 8/287:00 am -
2 stops30h 39m
Deal found 8/2![Multiple Airlines logo]()
$218
This American Airlines deal was found by Cheapflights users on 8/2. 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 8/283:06 pm -
1 stop8h 52m
Deal found 8/2![American Airlines logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 -
3 stops37h 51m
Deal found 8/3![Multiple Airlines logo]()
$232
This Southwest deal was found by Cheapflights users on 8/2. 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 9/2510:30 am -
2 stops10h 05m
Deal found 8/2![Southwest logo]()
$233
This Delta deal was found by Cheapflights users on 8/2. 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 10/164:47 pm -
2 stops10h 12m
Deal found 8/2![Delta logo]()
$237
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 5, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $375 (Delta) |
One-way from | $188 (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 5, 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
Quickest round-trip
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Wed 9/9
4:20 pm-11:20 pm
1 stop10h 00m
Seattle/Tacoma Intl
Wed 9/16
11:35 am-11:28 pm
1 stop8h 53m
$375
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Wed 9/9
5:45 am-3:00 pm
2 stops12h 15m
Seattle/Tacoma Intl
Wed 9/16
10:30 pm-10:55 am
1 stop9h 25m
$380
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Sat 8/29
6:05 am-2:45 pm
1 stop11h 40m
Seattle/Tacoma Intl
Tue 9/1
5:30 am-4:01 pm
1 stop7h 31m
$394
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Fri 10/16
3:41 pm-9:55 pm
1 stop9h 14m
Seattle/Tacoma Intl
Thu 11/19
7:04 pm-9:00 am
2 stops10h 56m
$464
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Tue 9/1
2:53 pm-11:20 pm
1 stop11h 27m
Seattle/Tacoma Intl
Sat 9/12
5:45 am-9:00 pm
2 stops12h 15m
$486
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Tue 9/1
9:49 am-7:07 pm
2 stops12h 18m
Seattle/Tacoma Intl
Sat 9/12
5:20 pm-10:04 am
2 stops13h 44m
$505
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Fri 9/18
12:55 pm-10:10 pm
2 stops12h 15m
Seattle/Tacoma Intl
Wed 9/23
11:59 pm-10:45 am
1 stop7h 46m
$516
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Thu 9/3
10:45 am-11:04 pm
2 stops15h 19m
Seattle/Tacoma Intl
Mon 9/7
11:04 pm-1:55 pm
2 stops11h 51m
$533
Cheapest one-way
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Sat 9/5
3:45 pm-11:44 pm
1 stop10h 59m
$188
PortlandSeattle
PWM - SEA
PWMSEA
Portland
Sat 9/5
7:25 am-6:20 pm
2 stops13h 55m
$193
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 $550 and $745 in September.The cheapest round-trip price found within the last 5 days was $375 on Delta (Sep 1-Sep 11).
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 5, 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.
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
Reviews
1 / 20
8.0
ExcellentLibby,Jun 2026
TUS - LAS
Boarding
8.1
Overall
8.0
Crew
8.6
Entertainment
7.5
Food
7.0
Comfort
8.0
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
Tumwater
Centralia
Marysville
Puyallup
Kent
Ellensburg
Fife
Ocean Shores
Lakewood
Lynnwood
Poulsbo
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Other flights from Portland
Popular flights
Seattle flight routes
Alternative routes for Portland to Seattle
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Seattle by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Portland to Seattle by cabin class
Find flights from Portland to Seattle, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Portland and Seattle flights
Browse other Portland and Seattle flight options. Last updated on August 5, 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 August 5, 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 August 5, 2026.
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 5, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$155 | Average$426 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$207 | Average$295 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$285 | Average$517 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$296 | Average$458 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$405 | Average$534 | FlexibilityNo cancel fee | On-time63% |