Portland (PDX) to Seattle (SEA)
Flight time
≈ 1h 04m
Bearing
6° N
Portland (PDX) to Seattle (SEA) is 129 miles (208 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies PDX–SEA
Filed traffic dataIn July 2026, SkyWest Airlines operated the most departures, one of 7 carriers flying nonstop PDX–SEA; the Embraer E175 was the most common aircraft at 84% of departures; flights ran 79% full.
Departures
1,217
July 2026
Seats
109,549
both directions
Passengers
86,087
both directions
Load factor
78.6%
RPM ÷ ASM
Who flies PDX–SEA?
SkyWest Airlines operated the most nonstop PDX–SEA departures in July 2026 (669), one of 7 carriers on the route.
- OO
669 departures · 49,752 seats
Share of departures55.0%79.6%
Load
- QX
350 departures · 26,600 seats
Share of departures28.8%80.0%
Load
- AS
187 departures · 31,852 seats
Share of departures15.4%76.8%
Load
- DL
7 departures · 626 seats
Share of departures0.6%50.8%
Load
- SY
2 departures · 372 seats
Share of departures0.2%22.6%
Load
- AA
1 departures · 172 seats
Share of departures0.1%95.3%
Load
- WN
1 departures · 175 seats
Share of departures0.1%99.4%
Load
What plane flies PDX–SEA?
In July 2026, the Embraer E175 flew 84% of PDX–SEA departures — more than any other aircraft type.
- Embraer E175
1,019 departures · 79.7% load
83.7% - Boeing 737-800
70 departures · 79.7% load
5.8% - Boeing 737-900ER
55 departures · 74.0% load
4.5% - Boeing 737 MAX 9
48 departures · 75.4% load
3.9% - Boeing 737 MAX 8
18 departures · 74.8% load
1.5% - Boeing 757-200
6 departures · 30.6% load
0.5% - Airbus A321neo
1 departures · 95.9% load
0.1%
How has PDX–SEA traffic changed?
Nonstop PDX–SEA departures fell from 1,284 in August 2025 to 1,217 in July 2026.
Monthly nonstop PDX–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
1,284 departures · 91,225 passengers
81.0%
Load
September 2025
1,168 departures · 85,449 passengers
80.0%
Load
October 2025
1,157 departures · 85,587 passengers
81.2%
Load
November 2025
1,042 departures · 79,602 passengers
78.0%
Load
December 2025
1,043 departures · 78,293 passengers
77.0%
Load
January 2026
977 departures · 73,421 passengers
74.0%
Load
February 2026
880 departures · 68,158 passengers
77.1%
Load
March 2026
1,064 departures · 80,470 passengers
75.5%
Load
April 2026
1,103 departures · 73,360 passengers
70.2%
Load
May 2026
1,131 departures · 76,111 passengers
75.7%
Load
June 2026
1,150 departures · 80,889 passengers
78.8%
Load
July 2026
1,217 departures · 86,087 passengers
78.6%
Load
By direction
Each direction is filed separately — they rarely match.
PDX → SEA
79.8% full
611 departures · 44,015 passengers
SEA → PDX
77.4% full
606 departures · 42,072 passengers
Nonstop PDX–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through July 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Portland (PDX) from Seattle (SEA)?
PDX to SEA is 129 miles (208 km / 112 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from PDX to SEA?
A nonstop covers the 129-mile great-circle distance in roughly 1h 04m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies PDX–SEA?
In July 2026, the Embraer E175 flew the largest share of departures (83.7%), followed by the Boeing 737-800 (5.8%).
What mileage do I earn flying PDX–SEA?
Distance-based programs credit off the 129-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
Trip reports on YouTube
Fliers post trip reports from this route to YouTube. These three were matched automatically from public YouTube listings — The Frequent Flier does not host, review, or endorse them.
The Trip Reporter
TRIP REPORT | Alaska/Horizon (Main Cabin) | Seattle to Portland | Bombardier Dash 8 Q400
12:15 · Dec 2022
QFS Aviation
TRIP REPORT | Horizon Air - Dash 8 400 - Seattle (SEA) to Portland (PDX) | Economy
25:34 · Oct 2018
Genki's Travels
Alaska Airlines | Bombardier Q400 | Economy Class | Portland (PDX) to Seattle (SEA) | Trip Report
11:50 · Aug 2022
Source: YouTube. Titles, thumbnails, and channel names come from YouTube. Playing a video loads the YouTube player, and using it means you agree to the YouTube Terms of Service; the Google Privacy Policy applies.
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