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£114 Cheap Flights from Portland (PWM) to Seattle (SEA)

View £114 flight on Wed, 2 Sept 2026Opens in a new window

Popular airlines from Portland Intl. Jetport Airport (PWM) to Seattle-Tacoma International Airport (SEA)

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Cheap Flights from Portland (PWM) to Seattle (SEA)

Prices were available within the past 7 days and start at £114 for one-way flights and £505 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

JetBlue Airways
Fri, 4 Sept - Sun, 6 Sept
PWM
Portland
SEA
Seattle
£505 Return, found 2 days ago
£505
Return
found 2 days ago
Select JetBlue Airways flight, departing Fri, 4 Sept from Portland to Seattle, returning Sun, 6 Sept, priced at £505 found 2 days ago
JetBlue Airways
Tue, 8 Sept - Tue, 15 Sept
PWM
Portland
SEA
Seattle
£533 Return, found 5 days ago
£533
Return
found 5 days ago
Select JetBlue Airways flight, departing Tue, 8 Sept from Portland to Seattle, returning Tue, 15 Sept, priced at £533 found 5 days ago
JetBlue Airways
Fri, 4 Sept - Sun, 6 Sept
PWM
Portland
SEA
Seattle
£549 Return, found 2 days ago
£549
Return
found 2 days ago
Select JetBlue Airways flight, departing Fri, 4 Sept from Portland to Seattle, returning Sun, 6 Sept, priced at £549 found 2 days ago
Alaska Airlines
Tue, 8 Sept - Tue, 15 Sept
PWM
Portland
SEA
Seattle
£575 Return, found 5 days ago
£575
Return
found 5 days ago
Select Alaska Airlines flight, departing Tue, 8 Sept from Portland to Seattle, returning Tue, 15 Sept, priced at £575 found 5 days ago
JetBlue Airways
Fri, 4 Sept - Sun, 6 Sept
PWM
Portland
SEA
Seattle
£578 Return, found 2 days ago
£578
Return
found 2 days ago
Select JetBlue Airways flight, departing Fri, 4 Sept from Portland to Seattle, returning Sun, 6 Sept, priced at £578 found 2 days ago
JetBlue Airways
Tue, 8 Sept - Tue, 15 Sept
PWM
Portland
SEA
Seattle
£581 Return, found 5 days ago
£581
Return
found 5 days ago
Select JetBlue Airways flight, departing Tue, 8 Sept from Portland to Seattle, returning Tue, 15 Sept, priced at £581 found 5 days ago
Alaska Airlines
Fri, 4 Sept - Sun, 6 Sept
PWM
Portland
SEA
Seattle
£592 Return, found 2 days ago
£592
Return
found 2 days ago
Select Alaska Airlines flight, departing Fri, 4 Sept from Portland to Seattle, returning Sun, 6 Sept, priced at £592 found 2 days ago
JetBlue Airways
Tue, 8 Sept - Tue, 15 Sept
PWM
Portland
SEA
Seattle
£611 Return, found 5 days ago
£611
Return
found 5 days ago
Select JetBlue Airways flight, departing Tue, 8 Sept from Portland to Seattle, returning Tue, 15 Sept, priced at £611 found 5 days ago
Alaska Airlines
Fri, 4 Sept - Sun, 6 Sept
PWM
Portland
SEA
Seattle
£632 Return, found 2 days ago
£632
Return
found 2 days ago
Select Alaska Airlines flight, departing Fri, 4 Sept from Portland to Seattle, returning Sun, 6 Sept, priced at £632 found 2 days ago
Alaska Airlines
Tue, 8 Sept - Tue, 15 Sept
PWM
Portland
SEA
Seattle
£723 Return, found 5 days ago
£723
Return
found 5 days ago
Select Alaska Airlines flight, departing Tue, 8 Sept from Portland to Seattle, returning Tue, 15 Sept, priced at £723 found 5 days ago

Frequently asked questions

How do I find cheap flights from Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
To find a cheap flight from Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the earliest flight from Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The earliest flight from Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.) typically departs at approximately 5:00 AM local time, operated by American Airlines. This is a seasonal service active in January. An early departure like this can help you maximise your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
You'll typically find the most flights from Portland Intl. Jetport (PWM) to Seattle - Tacoma Intl. (SEA) on a Monday, with around 25 flights available. This gives you plenty of options for your travel plans. Major airlines on this route include United Airlines, American Airlines, and Delta Air Lines. Flight schedules are consistent throughout the week, with Monday offering only slightly more options.
What are the most popular departure times for flights from Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
The most popular departure times for flights from Portland Intl. Jetport (PWM) to Seattle - Tacoma Intl. (SEA) are between 12pm and 3pm. About 28% of passengers prefer this time window. Many major carriers, including Delta Air Lines and Southwest Airlines, offer flights during this window. This timing works well because it allows for a morning in Portland before your flight, and you'll arrive in Seattle in the afternoon with time to settle in.
How do I earn miles on a Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight with Expedia?
It's easy to earn miles on a Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
Can I cancel or change the date of my flight from Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.)?
If you booked your Portland, ME (PWM-Portland Intl. Jetport) to Seattle, WA (SEA-Seattle - Tacoma Intl.) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Portland Intl. Jetport
Destination airport
Seattle - Tacoma Intl.
Return price
£505
Distance
3971 km

Book with confidence

Compare flights from Portland to Seattle easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Portland to Seattle. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Seattle - Tacoma Intl. in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Portland Intl. Jetport to Seattle - Tacoma Intl..  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Portland Intl. Jetport (PWM) to Seattle - Tacoma Intl. (SEA)

The easiest way to view the best deals on flights from Portland to Seattle today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Portland Intl. Jetport to Seattle - Tacoma Intl. start at just £505 and range up to £723.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Portland and Seattle
  • booking your flight during September, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Portland to Seattle flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Portland Intl. Jetport to Seattle - Tacoma Intl. for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Portland to Seattle easily and book with confidence

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