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Domestic route

Cheap flights from Portland to Seattle

Portland International Airport (PDX) to Seattle-Tacoma International Airport (SEA). 129 miles, 40m nonstop.

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PDX to SEA at a glance

Computed from airline schedules and the fares we track for this route. Refreshed several times a day.

Distance
129 milesgreat-circle
Typical flight time
40mnonstop, gate to gate
Nonstop airlines
DLASNKF94 airlinesDelta, Alaska, Spirit
Nonstop flights per day
19all airlines combined
Cheapest month
January 2027over the next six months
Best day to fly
Tuesday18% less than Sunday
Time difference
Same time zone

Portland to Seattle

Round trips from $46

Per traveler, taxes and fees included. Lowest fare we found departs Wed, Jan 13.

Cheapest month: January 2027

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Portland to Seattle fares by month

Lowest round-trip economy fare per traveler in each of the next six months, taxes and fees included. Select a month to search that date.

  1. September 2026from Wed, Sep 30$59
  2. October 2026from Wed, Oct 14$51
  3. November 2026from Wed, Nov 11$52
  4. December 2026from Wed, Dec 16$52
  5. January 2027from Wed, Jan 13$46
  6. February 2027from Tue, Feb 2$47

Airlines flying Portland to Seattle

4 airlines fly nonstop with 19 departures a day combined.

Connecting options

Every itinerary on this route is nonstop or uses an unusual connection; run a search for specifics.

Tips for this route

  • Delta, Alaska, Spirit and Frontier all fly PDX to SEA nonstop, so compare the total with bags before picking the lowest base fare: the difference between a basic and a standard economy ticket is often less than one checked bag each way.
  • Departing on a Tuesday averages 18% less than a Sunday on this route. If your dates are flexible, shift the outbound by a day or two and check the calendar view before you book.
  • Fares on this route are usually lowest 4 to 8 weeks before departure and rise sharply inside two weeks.
  • At 129 miles this is a short hop of 40m, so an early-morning departure, which is usually the cheapest and most punctual of the day, costs you little sleep.

Destination guide

Seattle: Coffee, mountains and Puget Sound

Seattle is the Pacific Northwest's gateway: Pike Place Market, the Space Needle and ferries across Puget Sound, with Mount Rainier and the Olympic Peninsula a couple of hours away. Sea-Tac is a Delta and Alaska hub with light rail downtown.

Best time to visit: July–September is dry, sunny and gorgeous — and the most expensive. May–June and late September are good compromises. October–April is gray and drizzly but cheap.

Flying the other way? Seattle to PortlandFares, airlines and tips for SEA to PDX.

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See every airline on PDX–SEA side by side with bags and seat rules spelled out.

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Portland to Seattle: common questions

How long is the flight from Portland to Seattle?

A nonstop flight from Portland (PDX) to Seattle (SEA) takes about 40m gate to gate, covering 129 miles. Connecting itineraries add the layover, typically 1 to 3 hours more in total.

Which airlines fly nonstop from PDX to SEA?

Delta Air Lines, Alaska Airlines, Spirit Airlines and Frontier Airlines operate nonstop flights from Portland (PDX) to Seattle (SEA), with 19 nonstop departures a day between them.

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

Over the next six months, January 2027 has the lowest round-trip fares from Portland (PDX) to Seattle (SEA), starting at $46 per traveler including taxes and fees. Within any month, Tuesday departures average the lowest prices.

How far in advance should I book Portland to Seattle flights?

Fares on this route are usually lowest 4 to 8 weeks before departure and rise sharply inside two weeks. Air1 Tickets includes free cancellation within 24 hours of booking on every fare, so you can lock in a good price and keep looking.

What is the time difference between Portland and Seattle?

Seattle is in the same time zone as Portland, so there is no clock change. PDX is on America/Los Angeles time and SEA on America/Los Angeles time. Departure and arrival times in search results are always shown in local time at each airport.

Related routes

Other popular city pairs from the same departure city and to the same destination, with the lowest round-trip fares we found.

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