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Cheap flights from Portland to Seattle from £66

PDX — SEA
14 Oct — 21 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

Sun 4/1009:31 -
Nonstop1h 08m
Sun 11/1007:20 -
Nonstop1h 08m
Deal found 9/9£83
Fri 9/1020:44 -
Nonstop1h 16m
Mon 12/1010:37 -
Nonstop1h 12m
Deal found 10/9£86
Fri 30/1007:09 -
Nonstop1h 16m
Sat 31/1014:42 -
1 stop6h 08m
Deal found 10/9£111
Thu 15/1007:18 -
1 stop10h 15m
Sun 18/1007:20 -
Nonstop1h 08m
Deal found 10/9£118
Fri 2/1019:59 -
1 stop18h 30m
Sat 24/1008:40 -
Nonstop1h 07m
Deal found 10/9£131
Wed 11/1117:45 -
1 stop15h 23m
Thu 12/1112:02 -
Nonstop1h 11m
Deal found 10/9£136
Thu 1/1019:59 -
1 stop12h 09m
Sun 4/1008:40 -
Nonstop1h 07m
Deal found 10/9£148
Sat 17/1014:30 -
Nonstop1h 05m
Tue 20/1007:20 -
Nonstop1h 08m
Deal found 11/9£160

Find flight deals from Portland to Seattle

Round-trip from

£83

One-way from

£66

Popular in

September

Cheapest in

January

Average price

£244
Alaska Airlines
  • Alaska Airlines
  • 4/10-11/10
  • Nonstop
  • 2h 16m total
  • Portland to Seattle
Search Deals
Delta
  • Delta
  • 15/11-31/12
  • Nonstop
  • 1h 15m total
  • Portland to Seattle
Search Deals
Highest demand for flights based on searches. 17% potential increase in price (£27 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£5 potential savings vs. average return 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 return flight

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Sun 15/11

19:35-20:50

Nonstop1h 15m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£66

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Sun 8/11

17:43-18:48

Nonstop1h 05m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£66
Fastest return journey

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Tue 8/12

21:59-23:00

Nonstop1h 01m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£66

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Mon 7/12

10:30-16:56

1 stop6h 26m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£75

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Sat 17/10

12:29-13:39

Nonstop1h 10m

Seattle/Tacoma Intl

Sat 24/10

09:36-10:45

Nonstop1h 09m

£86

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Sat 10/10

07:09-08:25

Nonstop1h 16m

Seattle/Tacoma Intl

Sat 17/10

21:59-23:02

Nonstop1h 03m

£86

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Fri 9/10

07:10-08:29

Nonstop1h 19m

Seattle/Tacoma Intl

Fri 16/10

07:32-08:46

Nonstop1h 14m

£86

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Sun 4/10

20:44-22:05

Nonstop1h 21m

Seattle/Tacoma Intl

Sun 11/10

07:32-08:46

Nonstop1h 14m

£86

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Fri 9/10

20:44-22:00

Nonstop1h 16m

Seattle/Tacoma Intl

Mon 12/10

07:32-08:46

Nonstop1h 14m

£86

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Tue 1/12

14:30-10:13

1 stop19h 43m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£94

Flights are sorted by cheapest return flights first.

Deals found on 9/9

Showing 1-10 of 22 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 return 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 to Seattle?

The price you pay for your flight from Portland to Seattle may vary depending on when you book. For the best chance of a lower fare, look to book 43 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from Portland to Seattle?

Currently, January is the cheapest month in which you can book a flight from Portland to Seattle (average of £103). Flying from Portland to Seattle in September is currently the most expensive (average of £244). 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.

What is the cheapest time of day to fly from PDX to SEA?

One of the essential ways to save on airfare from Portland to Seattle is to remain as flexible as possible. Flights that are in the afternoon tend to be the most expensive. A flight at midday could potentially save you up to 32% on airfare.

How much does it cost for a return flight from Portland to Seattle?

Airfare is below average for this route at the moment.

Portland to Seattle flights typically cost between £175 and £296 in October.
The cheapest return price found within the last 5 days was £83 on Alaska Airlines (4 Oct–11 Oct).

Related info for your journey

  • How popular is this Portland to Seattle flight route?

    Flights from Portland to Seattle/Tacoma Intl have been viewed 5 times in the past calendar month.

  • How long is the flight from Portland to Seattle?

    Airlines like Delta and Alaska Airlines fly from Portland to Seattle in about 1h 10m. The time it takes to get you to your destination can typically vary by up to 10h 08m. Portland and Seattle are separated by a distance of 129 mi. This flight may include one or multiple stops.

  • What are the most reliable airlines from Portland to Seattle?

    Before booking your flight to Seattle from Portland, check out the most reliable airlines to get you to your destination on time: Sun Country Air (100%), Aeromexico (87%), Air France( 84%).

  • 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 holiday 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 to Seattle?

    Currently, January is the cheapest month in which you can book a flight from Portland to Seattle (average of £103). Flying from Portland to Seattle in September is currently the most expensive (average of £244). 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
Federal Way
SeaTac

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

Cheapflights helps you search for flights from Portland to Seattle via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

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

Cheapflights helps you find that perfect flight to Seattle from Portland by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

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, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Seattle from Portland today and book when prices fit your budget.

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