Find flights
When to book
FAQs

Cheap flights from Portland, ME to Seattle from C$ 266

PWM — SEA
28 Oct — 4 Nov1
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 11/1112:45 p.m. -
1 stop8h 52m
Sat 14/1111:45 a.m. -
1 stop9h 34m
Deal found 28/9C$ 531
Tue 8/1212:49 p.m. -
2 stops14h 06m
Mon 14/1211:15 p.m. -
1 stop9h 42m
Deal found 28/9C$ 545
Wed 4/1112:45 p.m. -
2 stops13h 05m
Mon 9/118:30 a.m. -
2 stops12h 25m
Deal found 24/9C$ 552
Fri 23/106:00 a.m. -
1 stop8h 27m
Wed 28/107:04 p.m. -
2 stops10h 56m
Deal found 24/9C$ 562
Fri 23/103:40 p.m. -
1 stop8h 35m
Thu 29/107:04 p.m. -
2 stops10h 56m
Deal found 25/9C$ 569
Fri 23/102:09 p.m. -
2 stops12h 50m
Mon 26/1011:10 p.m. -
2 stops10h 52m
Deal found 27/9C$ 576
Wed 11/113:23 p.m. -
1 stop8h 56m
Thu 12/115:05 a.m. -
1 stop7h 57m
Deal found 24/9C$ 581
Wed 4/118:47 a.m. -
1 stop9h 45m
Mon 9/115:05 a.m. -
1 stop7h 57m
Deal found 24/9C$ 584
Wed 11/113:40 p.m. -
1 stop8h 59m
Sun 15/115:05 a.m. -
1 stop7h 57m
Deal found 27/9C$ 593

Find flight deals from Portland to Seattle

Round-trip from

C$ 531

One-way from

C$ 266

Popular in

June

Cheapest in

January

Average price

C$ 574
Delta
  • Delta
  • 11/11-14/11
  • 2 total stops
  • 18h 26m total
  • Portland to Seattle
Search Deals
Delta
  • Delta
  • 27/10-31/12
  • 1 total stop
  • 9h 49m total
  • Portland to Seattle
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (C$ 121 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease (C$ 39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in September 2026
Search Deals

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

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Tue 27/10

5:08 p.m.-11:59 p.m.

1 stop9h 51m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 273

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Tue 27/10

6:28 a.m.-2:45 p.m.

2 stops11h 17m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 273

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Fri 23/10

10:43 a.m.-6:19 p.m.

1 stop10h 36m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 290
Quickest round-trip

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Fri 13/11

4:50 p.m.-9:58 p.m.

1 stop8h 08m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 290

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Mon 2/11

5:08 p.m.-11:07 p.m.

1 stop8h 59m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 371

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Mon 26/10

1:05 p.m.-12:40 a.m.

2 stops14h 35m

Seattle/Tacoma Intl

Wed 31/12

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

Nonstop0h 00m

C$ 412

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Tue 8/12

6:00 a.m.-2:34 p.m.

1 stop11h 34m

Seattle/Tacoma Intl

Mon 14/12

11:55 a.m.-12:21 a.m.

1 stop9h 26m

C$ 538

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 4/11

4:47 p.m.-10:05 p.m.

1 stop8h 18m

Seattle/Tacoma Intl

Mon 9/11

11:40 p.m.-1:01 p.m.

1 stop10h 21m

C$ 538

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 4/11

5:08 p.m.-11:07 p.m.

1 stop8h 59m

Seattle/Tacoma Intl

Mon 9/11

8:18 p.m.-10:07 a.m.

2 stops10h 49m

C$ 545

PortlandSeattle

PWM Portland - SEA Seattle/Tacoma Intl

PWMSEA

Portland

Wed 11/11

2:05 p.m.-11:59 p.m.

2 stops12h 54m

Seattle/Tacoma Intl

Sat 14/11

8:30 a.m.-11:31 p.m.

2 stops12h 01m

C$ 547

Flights are sorted by cheapest round-trip flights first.

Deals found on 28/9

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

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 9 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, January is the cheapest month in which you can book a flight from Portland, Maine to Seattle (average of C$ 535). Flying from Portland, Maine to Seattle in June is currently the most expensive (average of C$ 964). 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$ 530 and C$ 804 in November.
The cheapest round-trip price found within the last 5 days was C$ 531 on Delta (11 Nov-14 Nov).

Related info for your journey

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

    For as low as C$ 545, Delta can have you in Seattle from Portland, Maine in 8h 59m. The distance between Portland, Maine and Seattle is about 3993 km. This flight may include one or multiple stops.

  • 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 C$ 535). Flying from Portland, Maine to Seattle in June is currently the most expensive (average of C$ 964). 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
Renton
Cashmere
Lynnwood
Ellensburg
Leavenworth
Tukwila
Tacoma
Marysville
Federal Way
Kirkland

Browse thousands of different options on Cheapflights for your next trip

Fly with Cheapflights

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

900+ travel sites are searched through when a user searches for a flight using Cheapflights. From the search interface, users can use filters to choose airlines, airports, flight times, cabin classes and more to their preference. Book your flight to Seattle from Portland today with Cheapflights!

Why should you use Cheapflights to find cheap flight tickets from Portland to Seattle?

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.

Can Cheapflights notify me if prices for flights from Portland to Seattle become cheaper?

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!

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.