Cheap Flights from Portland to Seattle

Travellers and cabin class

Compare Portland to Seattle flight deals

Find the cheapest month or even day of the year to fly to Seattle

Book the best Seattle fare with no extra fees

Find the cheapest month to fly from Portland to Seattle

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Portland to Seattle flights are currently cheapest in July.

Alternative Portland to Seattle routes

Looking for the cheapest, fastest or easiest route from Portland to Seattle? You could fly into the following airports instead.

Portland to Seattle: Flight information

The things to know before you go.
Cheapest flight foundج.م.‏ 8,773
Cheapest month to flyJuly

Finding cheap flights from Portland to Seattle: Frequently asked questions

There are 4 airports in Seattle: Seattle Lake Union SPB, Seattle Boeing Fld, Seattle / Tacoma International, and Paine Field.
The best price we found for a return flight from Portland to Seattle is ج.م.‏ 21,338. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Portland to Seattle. But we found flights with one or more stops from ج.م.‏ 21,338.
As of June 2025, there are no flights flying from Portland to Seattle.
The cheapest month to fly from Portland to Seattle is usually June 2025.
If you're flying from Portland Airport, the cheapest airport near Seattle is Seattle / Tacoma International – which is 19.5 km away from the centre of Seattle. We've found flights into this airport from ج.م.‏ 21,338.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Portland Airport to Seattle on Saturday, 19 July 2025.
No airlines currently offer direct flights between Portland Airport and Seattle. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Seattle but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Seattle is around 40 days in advance, so don’t leave your flight to the last minute.
In June, the average temperature is usually around 14°C. August is typically the warmest month in Seattle, when it usually averages around 23°C. You can expect the least rain in July. The coldest month is December, with temperatures averaging 0°C. The rainiest month is November.
Currently, United offers the cheapest flight tickets to Seattle.

Travelling from Portland International Jetport Airport (PWM) to Seattle: what you need to know

  • Seattle is three hours behind Portland, where Portland International Jetport Airport is located. Seattle follows the UTC-7 timezone.

  • For stress-free travel, turn up at the airport two hours ahead of international flights and one hour before domestic departures. That way, you won't have to rush to board your PWM to Seattle flight.

  • If you're heading away during a major holiday or another peak period, allow for even more time. A good rule is two hours ahead of domestic flights and up to four hours before international departures. Check-in and security lines will be longer.

  • PWM is around 5 kilometres from central Portland. If you're driving, ride-sharing or catching a cab from the centre, it'll take you 15 minutes or so to get there, depending on the traffic. If you're planning to take public transport, expect the travel time to be around 40 minutes.

  • Booked an early flight from Portland International Jetport Airport to Seattle? Avoid the hassle of rushing to the airport (and get some extra shut-eye) by choosing one of these stays close to PWM:

  • Portland International Jetport Airport scores high marks for on-time performance. 82.15% of flights that take off from PWM arrive at their destination on time.

  • You'll find PWM at 1001 Westbrook Street.

How to find the cheapest flights from Portland International Jetport Airport (PWM) to Seattle

  • ج.م.‏ 8,773 is currently the lowest price for a one-way Portland International Jetport Airport to Seattle flight. Return flight tickets start from ج.م.‏ 21,338. These fares can change depending on availability.

  • Booking early is often the key to securing a cheap flight from PWM to Seattle. Prices tend to rise as demand increases, so the nearer your departure date, the more expensive your ticket may be.

  • Landing cheap tickets from Portland International Jetport Airport to Seattle is more likely if you're flexible with your dates. Try using the 'Whole month' search tool to get the best prices across each month and score an awesome deal.

  • You don't need to check back in every day to find out if fares have dropped when you set up a Price Alert. We'll update you the moment there's an extra saving on cheap flights from PWM to Seattle.

  • Snag an affordable flight from Portland International Jetport Airport to Seattle with the help of our filters. Select your preferred duration, number of stops and airlines, then sort the results by 'Cheapest' for the best deals.

Airports in Seattle

Seattle-Tacoma International Airport (SEA)

  • Seattle-Tacoma International Airport (SEA) to the centre of Seattle takes about 20 minutes by car. The centre is roughly 23 kilometres away.

  • When travelling by public transport, expect a journey time of around 55 minutes.

  • If you have a late flight from Portland International Jetport Airport to Seattle, nothing beats the convenience of staying near the terminal. Grab your luggage from the carousel and then be showered and sleeping soon after at one of these accommodation options near SEA:

  • Follow your own route with a Seattle-Tacoma International Airport rental car. Book your wheels from Thrifty, Europcar or Budget and experience more of Seattle and beyond.

  • Reserving your vehicle from Seattle-Tacoma International Airport about one week before your flight from PWM to Seattle can help you get the best possible rate.

Lake Union Sea Plane Base Airport (LKE)

  • Lake Union Sea Plane Base Airport (LKE) is about 3 kilometres from the centre of Seattle. After your flight from Portland International Jetport Airport to Seattle, it'll take you around 10 minutes to get to the heart of the city in a ride-share or cab.

  • You can expect the journey to take roughly 25 minutes on public transport.

  • Hang the 'Do not disturb' sign on your door and unwind at a hotel near LKE. Here are a few options where you can check in after your PWM to Seattle flight:

Best time to go to Seattle

  • Before scheduling your flights from Portland International Jetport Airport to Seattle, consider which time of year is best for you. Peak season in Seattle offers a bustling atmosphere and plenty of things to do, while the low season means you'll get cheaper hotel rates and smaller crowds.

  • Lock in a Portland International Jetport Airport to Seattle flight ticket with a departure in August to explore the city during its warmest month. You can expect temperatures to range from 12ºC to 28ºC.

  • If you like travelling in cooler conditions, search for a cheap ticket from PWM to Seattle in February when temperatures average between -1ºC and 11ºC.

More about Seattle

  • When it comes to searching for somewhere to rest your head, you'll find the best places to stay in Seattle right here. Check out these options after you've booked your flight from Portland International Jetport Airport to Seattle:

  • LMN Architects and Greyhound: Bus Station are just a couple of the leading attractions to put on your Seattle travel itinerary. Keep the momentum going by heading to Boeing Radiation Effects Lab.

Explore more of United States

  • You've seen Seattle, now it's time to explore other parts of United States. Travel about 241 kilometres south to Portland to tick off its leading attractions. From Pioneer Courthouse Square to Portland Japanese Garden and Pittock Mansion, your itinerary will be busy.

  • If there's time to check out another corner of United States, head for Spokane, roughly 370 kilometres east of Seattle. Manito Park, Northwest Museum of Arts & Culture and Spokane Falls are among the biggest draws.

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.