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Cheap flights from Portland, ME to Seattle from C$ 267

PWM — SEA
8 Oct — 15 Oct1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Portland to Seattle

Enter your travel dates to find the best prices.

Cheapest flights from Portland to Seattle

Wed 4/114:47 p.m. -
1 stop8h 18m
Tue 10/1111:15 p.m. -
1 stop9h 43m
Deal found 3/9C$ 518
Wed 28/1012:55 p.m. -
2 stops14h 00m
Wed 4/116:30 p.m. -
2 stops13h 00m
Deal found 5/9C$ 532
Wed 4/1112:42 p.m. -
2 stops12h 23m
Wed 11/119:45 a.m. -
2 stops10h 36m
Deal found 3/9C$ 534
Sat 21/112:05 p.m. -
1 stop9h 43m
Sat 5/1211:55 a.m. -
1 stop9h 26m
Deal found 7/9C$ 546
Fri 2/104:20 p.m. -
1 stop10h 00m
Mon 5/1011:05 p.m. -
2 stops11h 07m
Deal found 7/9C$ 557
Fri 16/104:15 p.m. -
1 stop9h 49m
Mon 19/1011:50 p.m. -
2 stops10h 22m
Deal found 3/9C$ 558
Sat 17/108:03 a.m. -
2 stops10h 49m
Tue 20/1011:14 p.m. -
1 stop7h 48m
Deal found 4/9C$ 567
Wed 11/114:03 p.m. -
1 stop9h 57m
Sun 15/1111:15 p.m. -
1 stop9h 43m
Deal found 3/9C$ 579

Find flight deals from Portland to Seattle

Round-trip from

C$ 518

One-way from

C$ 267

Popular in

June

Cheapest in

May

Average price

C$ 560
United Airlines
  • United Airlines
  • 11/11-14/11
  • 2 total stops
  • 17h 58m total
  • Portland to Seattle
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United Airlines
  • United Airlines
  • 26/9-31/12
  • 1 total stop
  • 8h 48m total
  • Portland to Seattle
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (C$ 112 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease (C$ 38 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
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Cheapflights Fare Finder

 
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

Price

Cheapest round-trip
Quickest round-trip

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Sat 26/9

5:08 p.m.-10:56 p.m.

1 stop8h 48m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 267

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 16/9

5:45 a.m.-1:00 p.m.

1 stop10h 15m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 380

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Fri 9/10

4:15 p.m.-11:04 p.m.

1 stop9h 49m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 387

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Sun 1/11

1:40 p.m.-12:40 a.m.

2 stops14h 00m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 401

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Thu 8/10

6:00 a.m.-3:51 p.m.

2 stops12h 51m

Seattle/Tacoma Intl

Wed 31/12

12:00 a.m.-3:00 a.m.

Nonstop0h 00m

C$ 474

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 11/11

4:03 p.m.-11:00 p.m.

1 stop9h 57m

Seattle/Tacoma Intl

Sat 14/11

11:15 p.m.-11:19 a.m.

2 stops9h 04m

C$ 525

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 4/11

6:01 a.m.-5:10 p.m.

2 stops14h 09m

Seattle/Tacoma Intl

Tue 10/11

6:00 a.m.-11:31 p.m.

2 stops14h 31m

C$ 534

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 4/11

12:42 p.m.-8:50 p.m.

2 stops11h 08m

Seattle/Tacoma Intl

Wed 11/11

11:45 a.m.-12:19 a.m.

1 stop9h 34m

C$ 553

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 11/11

4:03 p.m.-11:00 p.m.

1 stop9h 57m

Seattle/Tacoma Intl

Sun 15/11

11:15 p.m.-11:58 a.m.

1 stop9h 43m

C$ 579

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 11/11

12:45 p.m.-10:30 p.m.

2 stops12h 45m

Seattle/Tacoma Intl

Sun 15/11

6:25 p.m.-9:50 a.m.

2 stops12h 25m

C$ 593

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/9

Showing 1-10 of 12 resultsSorted by cheapest first
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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

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 best time to book flights from Portland, Maine to Seattle is 39 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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 C$ 538). Flying from Portland, Maine to Seattle in June is currently the most expensive (average of C$ 941). 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 typical for this route at the moment.

Portland, Maine to Seattle flights typically cost between C$ 441 and C$ 681 in November.
The cheapest round-trip price found within the last 5 days was C$ 518 on Delta (4 Nov-10 Nov).

Related info for your journey

  • How long is the flight from Portland, Maine to Seattle?

    For as low as C$ 525, Delta can have you in Seattle from Portland, Maine in 9h 57m. The distance between Portland, Maine and Seattle is about 3993 km.

  • 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, May is the cheapest month in which you can book a flight from Portland, Maine to Seattle (average of C$ 538). Flying from Portland, Maine to Seattle in June is currently the most expensive (average of C$ 941). 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

Travelling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
SeaTac
Kent
Mukilteo
Leavenworth
Tacoma
Renton
Cashmere
Lynnwood
Ellensburg
Tukwila
Olympia
Marysville
Federal Way
Kirkland

Browse thousands of different options on Cheapflights for your next trip

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How does Cheapflights help users find flights from Portland to Seattle?

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Millions of users choose and trust Cheapflights to book the best flight deals from Portland to Seattle for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Portland to Seattle with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Portland to Seattle, users can toggle the no change fees filter when performing a flight search.

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Yes, and it’s super simple to set up. Click the bell icon next to the flight deals above and provide a valid email address to enable Price Alerts. That’s it!

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