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Cheap flights from Portland to Seattle from £87

PDX — SEA
29 Nov — 6 Dec1
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

Mon 7/1217:53 -
1 stop14h 15m
Tue 8/1210:20 -
Nonstop1h 04m
Deal found 29/10£141
Sat 5/1212:06 -
Nonstop0h 59m
Sat 12/1210:20 -
Nonstop1h 04m
Deal found 29/10£163
Wed 2/1211:57 -
1 stop5h 13m
Wed 2/1220:57 -
Nonstop0h 55m
Deal found 28/10£167
Sat 28/1107:00 -
Nonstop1h 18m
Sun 29/1120:58 -
Nonstop0h 59m
Deal found 29/10£170
Fri 4/1206:26 -
Nonstop1h 04m
Sun 6/1218:57 -
Nonstop0h 56m
Deal found 27/10£178
Thu 10/1221:33 -
1 stop10h 43m
Thu 17/1219:59 -
Nonstop0h 55m
Deal found 26/10£180

Find flight deals from Portland to Seattle

Round-trip from

£136

One-way from

£87

Popular in

March

Cheapest in

January

Average price

£211

Good round-trip deal

£268 or less
Alaska Airlines
  • Alaska Airlines
  • 25/1-25/1
  • 1 total stop
  • 6h 02m total
  • Portland to Seattle
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Alaska Airlines
  • Alaska Airlines
  • 4/12-31/12
  • 1 total stop
  • 15h 20m total
  • Portland to Seattle
Search Deals
High demand for flights, 1% potential price rise
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Cheapest flight prices on average. 3% potential price decrease (£5 potential savings vs. average return price).
Search Deals
Average for round-trip flights in October 2026
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Price to beat on a round-trip flight from Portland to Seattle/Tacoma Intl.
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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

Fri 11/12

17:40-08:16

1 stop14h 36m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£95
Fastest return journey

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Tue 22/12

16:15-17:28

Nonstop1h 13m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£104

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Tue 2/2

19:38-20:52

Nonstop1h 14m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£104

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Sat 12/12

11:32-12:45

Nonstop1h 13m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£104

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Mon 21/12

17:53-23:59

1 stop6h 06m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£106

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Fri 25/12

16:15-17:28

Nonstop1h 13m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£112

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Thu 10/12

14:15-15:29

Nonstop1h 14m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£112

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Fri 29/1

19:38-20:52

Nonstop1h 14m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£112

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Thu 17/12

09:23-10:42

Nonstop1h 19m

Seattle/Tacoma Intl

Wed 31/12

00:00-00:00

Nonstop0h 00m

£112

PortlandSeattle

PDX Portland - SEA Seattle/Tacoma Intl

PDXSEA

Portland

Tue 12/1

17:37-09:08

1 stop15h 31m

Seattle/Tacoma Intl

Wed 13/1

12:35-13:29

Nonstop0h 54m

£140

Flights are sorted by cheapest return flights first.

Deals found on 26/10

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 £118). Flying from Portland to Seattle in March is currently the most expensive (average of £241). 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 78% 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 £140 and £297 in January.
The cheapest return price found within the last 5 days was £136 on Alaska Airlines (25 Jan–25 Jan).

Related info for your journey

  • How popular is this Portland to Seattle flight route?

    Flights from Portland to Seattle/Tacoma Intl have been viewed 2 times in the past calendar month.

  • How long is the flight from Portland to Seattle?

    Airlines like Alaska Airlines and Delta fly from Portland to Seattle in about 1h 18m. The time it takes to get you to your destination can typically vary by up to 16h 20m. 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: Aeromexico (92%), Air France (90%), Delta( 81%).

  • 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 £118). Flying from Portland to Seattle in March is currently the most expensive (average of £241). 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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