The cheapest times to fly from PDX to SEA are
- January 8th to February 18th (except the week of February 5th)
- May 21st to June 10th
- June 25th to July 15th
- August 13th to November 18th
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from PDX to SEA is mid November. Prices can be as high as $335 for Sunday flights during mid March, or as low as $117 for Tuesday flights around mid November.
When to Fly to Seattle
Flying from Portland, OR (PDX) to Seattle, WA (SEA) will usually cost between $117 to $172 per person if booking more than four weeks in advance. On average the very cheapest time to fly is mid November with an average ticket price of $127. Due to high demand the most expensive time to fly is mid March, with an average price of $238. Planning your trip to low-cost times can easily save you $112 on economy flights and even more on first-class flights. Generally, any price below $138 can be considered a good price for a round-trip PDX to SEA flight.
See below for a graph of average weekly prices for the PDX to SEA route. All prices are for round-trip tickets in USD.
Compared to other flights, the PDX to SEA flight is much cheaper than the average and costs much less than the average flight leaving from Portland. The average price per mile (for a direct flight) is $0.66, which is above average.
Flight Prices by Day of the Week
Tuesday is usually the cheapest day to fly to SEA, and Wednesday the cheapest day to fly back into PDX. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $16 (11%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $133. Return trip prices are from the SEA to PDX flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from PDX to SEA can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 1 hour 13 minutes may be realistic.
Alternative Nearby Airports
Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is a nonstop flight from PDX to SEA while comparing.
- 32 miles (51 km) away from SEA
- Usually 2.55% less expensive than SEA
- Nonstop flights available
Flight Questions Answered
Still have questions about flying from PDX to SEA? We’ve got answers.
Which airlines fly this route?
You can find 12 major airlines flying this route most often: Alaska, American, China Eastern, Delta, Emirates, Fiji Airways, Frontier, JetBlue, Singapore Airlines, Southwest, Spirit, United, and potentially more during busy seasons.
How far away is it from Seattle/Tacoma International Airport to Portland International Airport?
The distance between the two airports is roughly 129 miles or 208 kilometers.
How long does it take to fly from PDX to SEA?
The real-world flight time for a nonstop PDX to SEA flight is about 1 hour 13 minutes.
How many flights go between Portland, OR and Seattle, WA?
It depends on the day of the week and the date, but a typical day might have around 53 available flights from PDX to SEA.
Airport Location Info
|Origination airport name||Portland International Airport|
|Country||the United States|
|Destination airport name||Seattle/Tacoma International Airport|
|Country||the United States|
Late and Early Flight Data
Flights from PDX to SEA tend to depart late far less frequently than the average flight. According to our recently updated data, 16% of flights departed 5 or more minutes late, and 42% of flights left 5 or more minutes early. On average you can expect to leave SEA heading for PDX about 4 minutes late. This does significantly impact arrival time, as the average landing time in Seattle, WA is about 5 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:
- Delta: 6 minutes late
- SkyWest: 1 minutes late
- Alaska: 5 minutes late
- Some airlines not reporting
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.