PWM - SEA

C$ 178 Find Cheap Flights from Portland to Seattle – Compare and Save

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Everything you should know

Cheapest round-trip
C$ 340
Typical prices: C$ 487-C$ 843
Delta
Sun 14/10Wed 17/10
PWM - SEA • 1 stop
Cheapest one-way flights
C$ 178
Typical prices: C$ 264-C$ 493
Southwest
Sun 2/12
PWM - SEA • 2 stops
Direct flights
Not available
There are currently no direct flights between Portland and Seattle. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to book
25 weeks
in advance
Our data shows that travellers who book at least 25 weeks in advance save around 34% compared to booking last minute.
Insights
Insights
When to travel
September
Cheapest • 20% price drop
August
Most popular
Good to know
+1
Good to know
+1
Top layover airports
New York John F Kennedy Intl (JFK)
Cheapest • Avg C$ 553 (round-trip)
Detroit Metropolitan Wayne County (DTW)
Shortest trip • 8h 16m (one-way)
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Insights
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We hope you enjoy your trip to Seattle!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Portland to Seattle (PWM-SEA)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Portland to Seattle

Wed, 14 Oct - Sat, 17 Oct
Delta Logo
4:15 p.m. - 11:04 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
9h 49m1 stop New York John F Kennedy Intl
Delta Logo
11:50 a.m. - 12:10 a.m.SEA  Seattle/Tacoma Intl-PWM Portland
9h 20m1 stop New York John F Kennedy Intl
C$ 340Delta
Tue, 8 Dec - Mon, 14 Dec
Delta Logo
11:40 a.m. - 10:04 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
13h 24m2 stops New York LaGuardia Detroit Metropolitan Wayne County
Delta Logo
6:00 a.m. - 4:11 p.m.SEA  Seattle/Tacoma Intl-PWM Portland
7h 11m1 stop Detroit Metropolitan Wayne County
C$ 413Delta
Tue, 8 Dec - Mon, 14 Dec
Delta Logo
6:00 a.m. - 2:44 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
11h 44m2 stops New York John F Kennedy Intl Salt Lake City
Delta Logo
6:00 a.m. - 11:20 p.m.SEA  Seattle/Tacoma Intl-PWM Portland
14h 20m2 stops Minneapolis St Paul New York LaGuardia
C$ 420Delta
Sat, 31 Oct - Wed, 4 Nov
United Airlines Logo
8:31 a.m. - 3:32 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
10h 01m1 stop Chicago O'Hare Intl
United Airlines Logo
5:05 a.m. - 4:02 p.m.SEA  Seattle/Tacoma Intl-PWM Portland
7h 57m1 stop Denver Intl
C$ 493United Airlines
Sat, 31 Oct - Sun, 8 Nov
Delta Logo
1:10 p.m. - 8:53 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
10h 43m2 stops Detroit Metropolitan Wayne County Minneapolis St Paul
Delta Logo
11:59 p.m. - 1:01 p.m.SEA  Seattle/Tacoma Intl-PWM Portland
10h 02m1 stop Atlanta Hartsfield-Jackson
C$ 499Delta
Sat, 31 Oct - Wed, 4 Nov
United Airlines Logo
8:31 a.m. - 8:47 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
15h 16m2 stops Chicago O'Hare Intl San Francisco
United Airlines Logo
5:05 a.m. - 4:02 p.m.SEA  Seattle/Tacoma Intl-PWM Portland
7h 57m1 stop Denver Intl
C$ 500United Airlines
Sat, 31 Oct - Sun, 8 Nov
Delta Logo
1:10 p.m. - 8:53 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
10h 43m2 stops Detroit Metropolitan Wayne County Minneapolis St Paul
Delta Logo
11:10 p.m. - 4:38 p.m.SEA  Seattle/Tacoma Intl-PWM Portland
14h 28m2 stops Detroit Metropolitan Wayne County New York LaGuardia
C$ 506Delta
Sat, 31 Oct - Wed, 4 Nov
United Airlines Logo
5:30 a.m. - 3:32 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
13h 02m2 stops Washington, D.C. Dulles Intl Chicago O'Hare Intl
United Airlines Logo
8:09 a.m. - 11:21 p.m.SEA  Seattle/Tacoma Intl-PWM Portland
12h 12m2 stops Washington, D.C. Dulles Intl Newark
C$ 508United Airlines
Fri, 30 Oct - Mon, 2 Nov
Southwest Logo
3:25 p.m. - 1:00 a.m.PWM  Portland-SEA Seattle/Tacoma Intl
12h 35m2 stops Baltimore/Washington Las Vegas Harry Reid Intl
Southwest Logo
6:35 p.m. - 9:50 a.m.SEA  Seattle/Tacoma Intl-PWM Portland
12h 15m2 stops San Diego Baltimore/Washington
C$ 514Southwest
Wed, 4 Nov - Wed, 11 Nov
Delta Logo
4:15 p.m. - 11:04 p.m.PWM  Portland-SEA Seattle/Tacoma Intl
9h 49m1 stop New York John F Kennedy Intl
Delta Logo
11:45 a.m. - 12:19 a.m.SEA  Seattle/Tacoma Intl-PWM Portland
9h 34m1 stop New York John F Kennedy Intl
C$ 521Delta
Booking Insights

Price, demand, and travel trends for Portland to Seattle flights

Use KAYAK data on prices, travel dates, airlines, and seasonal trends to compare options and book flights from Portland to Seattle with more confidence.

How much is a round-trip flight from Portland to Seattle?

Round-trip flights from Portland to Seattle start at C$ 340. Prices are below average for this route right now, with typical round-trip fares ranging from C$ 487 to C$ 843. The lowest price found in the past 5 days was C$ 340 on Delta.

What's the cheapest day of the week to fly from Portland to Seattle?

Wednesday is the cheapest day of the week to fly from Portland to Seattle and is 22% cheaper than the average day. Sunday is the most expensive day with flight prices 41% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Portland to Seattle?

  • September is the cheapest month to fly from Portland to Seattle at C$ 506 round-trip.
  • June (C$ 946) and August (C$ 872) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 87% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Portland to Seattle the cheapest?

Flights from Portland to Seattle are cheapest 25 weeks before departure. Booking in this window typically costs about 34% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

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Key details for Portland to Seattle flights

Low season

February

Cheapest flight

C$ 178
Best time to beat the crowds (3% less expensive on average)
Most popular time to fly (37% more expensive on average)
Flights from Portland to Seattle

When to book flights from Portland to Seattle

Are your dates flexible? Find out the best times to travel from Portland to Seattle based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Portland to Seattle flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines, and booking questions.

  • Which airports can I use when flying from Portland to Seattle?

    Flights from Portland to Seattle usually depart from Portland (PWM) and arrive at Seattle/Tacoma Intl (SEA).

  • Which airports do connecting flights from Portland to Seattle pass through?

    One-stop flights from Portland to Seattle most commonly connect through:

    • Chicago O'Hare Intl (ORD) – 22% of one-stop connections
    • Philadelphia (PHL) – 21% of one-stop connections
    • New York John F Kennedy Intl (JFK) – 13% of one-stop connections
    • Detroit Metropolitan Wayne County (DTW) – 12% of one-stop connections

    Chicago O'Hare Intl (ORD) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Portland to Seattle?

    Yes. Being flexible with your travel dates can save you up to 45% on the Portland to Seattle route. Wednesday is the cheapest departure day at C$ 502 round-trip on average, while Sunday is the most expensive at C$ 899, a difference of C$ 397. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • Which popular places can I visit in Seattle?

    Some of the most popular sights in Seattle are Lumen Field, T-Mobile Park, and Seattle Waterfront. These are among the most viewed places in Seattle on KAYAK.

  • How expensive are last-minute Portland to Seattle flights?

    Last-minute fares on this route – booked within 2 weeks of departure – run 0% above the route average of C$ 635. Book 25 weeks before departure for the lowest fares.

  • How long does a flight from Portland to Seattle take?

    A direct flight from Portland to Seattle takes 0h 00m, covering 6,425 km.

  • Do I need a passport to fly from Portland to Seattle?

    No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

  • Have flight prices from Portland to Seattle changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about C$ 340 to C$ 1,862. That means the highest observed fare was about 5x higher than the lowest one.

  • How are flight prices from Portland to Seattle looking right now?

    One-way fares from Portland to Seattle are currently higher than usual. Average one-way flight prices are about C$ 371, which is 8% above the typical average for this route.

  • How much time can I save by choosing a different layover airport when travelling from Portland to Seattle?

    Flying via Detroit Metropolitan Wayne County (DTW) gives the shortest average 1-stop total travel time at 8h 16m, compared with 8h 16m via Denver Intl (DEN) and 8h 22m via Washington, D.C. Dulles Intl (IAD).

  • What is the time difference between Portland and Seattle?

    Seattle is 3 hours behind Portland (Pacific Time vs Eastern Time). Plan for the time shift when scheduling connections or first-day activities.

  • What car rental options are available at Seattle/Tacoma Intl Airport (SEA)?

    Seattle/Tacoma Intl Airport (SEA) hosts 5 major car rental companies, with daily rates starting from around C$ 5 for economy cars. Top options include:
    • Fox
    • Europcar
    • Thrifty
    • Budget
    • Dollar

  • How much should I expect to pay for a Portland to Seattle flight?

    Round-trip flights from Portland to Seattle range from C$ 487 to C$ 843, with an average of C$ 635 over the past 12 months. Anything below C$ 487 counts as a good deal.

Your guide to booking Portland to Seattle flights

Get tips on when to book, when to fly, and what to know before your trip.
  • If your dates are flexible, aim for a Wednesday departure instead of Sunday. On this route, Wednesday flights average C$ 502 – about C$ 397 less than Sunday (44% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 25 weeks before you fly. On this route, that window historically saves about 34% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Portland to Seattle trip for September. Fares historically average C$ 506 round-trip in that month – typically C$ 440 less than the most expensive month, which is June (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to Seattle/Tacoma Intl Airport.
    - Seattle Airport Marriott
    - Coast Gateway Hotel
    - Fairfield by Marriott Inn & Suites Seattle Sea-Tac Airport

More options for your flight from Portland to Seattle

Complete your trip to Seattle with a hotel stay or car rental

Car rentals in Seattle
Hotels in Seattle
Vacations in Seattle