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
US DOT T-100 · filed dataIn April 2026, SkyWest Airlines operated the most departures, one of 5 carriers flying nonstop PDX–SEA; the Embraer E175 was the most common aircraft at 75% of departures; flights ran 70% full.
Departures
1,103
April 2026
Seats
104,488
both directions
Passengers
73,360
both directions
Load factor
70.2%
passengers ÷ seats
Who flies PDX–SEA?
SkyWest Airlines operated the most nonstop PDX–SEA departures in April 2026 (479), one of 5 carriers on the route.
- OO
SkyWest Airlines
479 departures · 35,018 seats
Share of departures43.4%68.3%
Load
- QX
Horizon Air
350 departures · 26,600 seats
Share of departures31.7%81.8%
Load
- AS
Alaska Airlines
174 departures · 29,896 seats
Share of departures15.8%69.9%
Load
- DL
Delta Air Lines
99 departures · 12,788 seats
Share of departures9.0%53.0%
Load
- SY
Sun Country Airlines
1 departures · 186 seats
Share of departures0.1%0.0%
Load
What plane flies PDX–SEA?
In April 2026, the Embraer E175 flew 75% of PDX–SEA departures — more than any other aircraft type.
- Embraer E175
829 departures · 74.2% load
75.2% - Boeing 737-800
73 departures · 58.5% load
6.6% - Boeing 737-900ER
62 departures · 68.6% load
5.6% - Boeing 737 MAX 9
50 departures · 70.0% load
4.5% - Airbus A220-100
37 departures · 68.3% load
3.4% - Airbus A220-300
30 departures · 53.9% load
2.7% - Boeing 737 MAX 8
19 departures · 69.2% load
1.7% - Boeing 757-200
3 departures · 20.4% load
0.3%
How has PDX–SEA traffic changed?
Nonstop PDX–SEA departures fell from 1,226 in May 2025 to 1,103 in April 2026.
Monthly nonstop PDX–SEA traffic, trailing 12 months through April 2026. Bars scale to the busiest month; months with no filed service show as zero.
May 2025
1,226 departures · 85,490 passengers
78.6%
Load
June 2025
1,265 departures · 87,024 passengers
79.4%
Load
July 2025
1,335 departures · 93,671 passengers
82.0%
Load
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
By direction
The DOT files each direction separately — they rarely match.
SEA → PDX
69.5% full
552 departures · 36,170 passengers
PDX → SEA
70.9% full
551 departures · 37,190 passengers
Nonstop PDX–SEA traffic has been filed with the US DOT since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through April 2026; filings from 2025. Public domain (US Government work). The DOT publishes roughly three months in arrears.
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 April 2026, the Embraer E175 flew the largest share of departures (75.2%), followed by the Boeing 737-800 (6.6%).
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.
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