£386 Cheap Flights from Portland (PWM) to Seattle (SEA)

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.

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.

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.

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.

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.

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.