Portland International Airport
Portland, United StatesPDX / KPDX
Major airport · 93 direct destinations · 3 runways · longest runway 11,001 ft
50 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Portland → Seattle
PDX
PortlandPortland International Airport
PortlandPortland International AirportSEASeattleSeattle–Tacoma International Airport
SeattleSeattle–Tacoma International Airport- Distance
- 129 mi
- Estimated flight time
- ~45m
Same local time in Portland and Seattle.
Observed nonstop
How often does this route fly?
Frequency
Throughout the day
On average around 19 flights a day, observed from October 2025 to September 2026.
- 19
- flights per day
- 20.5
- busiest month · Sep
- 16
- quietest month · Jan
- 32 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 16Jan2026
- 17Feb
- 18Mar
- 19Apr
- 19May
- 19.5Jun
- 20Jul
- 20Aug
- 20.5Sep
- 19Oct2025
- 17Nov
- 17Dec
Airlines
Who flies it
SkyWest Airlinesall year
Horizon Airall year
Alaska Airlinesall year
ABX Airall year
Delta Air Linesall year
Sun Country Airlinesnow and then
Air Transport Internationalnow and then
Through the day
Departure times
Local time in Portland. Most departures between 05:00 and 08:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 17.9Mon
- 18.2Tue
- 18.4Wed
- 18.5Thu
- 18.8Fri
- 18.9Sat
- 16.6Sun
Fleet
Aircraft observed
- Embraer 175E75L73%
- Boeing 737-800B7388%
- Boeing 737-900B7396%
- Boeing 737 MAX 9B39M5%
- Boeing 767-300B7632%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 16 | 496 |
|
| February 2026 | 17 | 458 |
|
| March 2026 | 18 | 539 |
|
| April 2026 | 19 | 535 |
|
| May 2026 | 19 | 542 |
|
| June 2026 | 19.5 | 594 |
|
| July 2026 | 20 | 613 |
|
| August 2026 | 20 | 588 |
|
| September 2026 | 20.5 | 600 |
|
| October 2025 | 19 | 598 |
|
| November 2025 | 17 | 508 |
|
| December 2025 | 17 | 490 |
|
Airlines observed on this route
From observed callsign routes on PDX-SEA - not a booking guarantee.
About this route
- Domestic route: both airports are in the same country.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Portland: 93.
- Direct destinations observed from Seattle: 132.
The airports on this route
Seattle–Tacoma International Airport
Seattle, United StatesSEA / KSEA
International hub · 132 direct destinations · 3 runways · longest runway 11,900 ft
47 °F · FogSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Portland to Seattle
The observed direct connection between Portland International Airport (PDX) and Seattle–Tacoma International Airport (SEA) covers approximately 129 mi. The estimated flight time is around 45m. ABX Air, Air Transport International, Alaska Airlines, Delta Air Lines, Horizon Air, SkyWest Airlines and Sun Country Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Portland from Seattle by air?
- The great-circle distance between Portland International Airport and Seattle–Tacoma International Airport is approximately 129 mi.
- How long is the flight from Portland to Seattle?
- Based on the distance, the estimated flight time is about 45m. This is an estimate, not a schedule.
- Is there a direct connection from Portland to Seattle?
- Yes, a direct connection between PDX and SEA has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: ABX Air, Air Transport International, Alaska Airlines, Delta Air Lines, Horizon Air, SkyWest Airlines and Sun Country Airlines.
- How often is there a flight from Portland to Seattle?
- On average around 19 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 6,561 observed flights. Mainly SkyWest Airlines, Horizon Air, Alaska Airlines. That is an observation, not a timetable.
- What is the current time difference between Portland and Seattle?
- Same local time in Portland and Seattle.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.