Pasco (PSC) to Seattle (SEA)
Flight time
≈ 1h 09m
Bearing
300° NW
Pasco (PSC) to Seattle (SEA) is 172 miles (276 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies PSC–SEA
Filed traffic dataIn July 2026, Horizon Air operated the most departures, one of 4 carriers flying nonstop PSC–SEA; the Embraer E175 was the most common aircraft at 100% of departures; flights ran 78% full.
Departures
467
July 2026
Seats
35,520
both directions
Passengers
27,728
both directions
Load factor
78.1%
RPM ÷ ASM
Who flies PSC–SEA?
Horizon Air operated the most nonstop PSC–SEA departures in July 2026 (278), one of 4 carriers on the route.
- QX
278 departures · 21,128 seats
Share of departures59.5%80.9%
Load
- OO
187 departures · 14,020 seats
Share of departures40.0%73.4%
Load
- AS
1 departures · 178 seats
Share of departures0.2%89.3%
Load
- DL
1 departures · 194 seats
Share of departures0.2%90.2%
Load
What plane flies PSC–SEA?
In July 2026, the Embraer E175 flew 100% of PSC–SEA departures — more than any other aircraft type.
- Embraer E175
465 departures · 77.9% load
99.6% - Airbus A321neo
1 departures · 90.2% load
0.2% - Boeing 737-900ER
1 departures · 89.3% load
0.2%
How has PSC–SEA traffic changed?
Nonstop PSC–SEA departures fell from 508 in August 2025 to 467 in July 2026.
Monthly nonstop PSC–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
August 2025
508 departures · 30,727 passengers
71.9%
Load
September 2025
453 departures · 29,805 passengers
76.2%
Load
October 2025
458 departures · 30,092 passengers
75.8%
Load
November 2025
421 departures · 29,996 passengers
79.2%
Load
December 2025
468 departures · 34,292 passengers
79.7%
Load
January 2026
408 departures · 29,005 passengers
78.2%
Load
February 2026
362 departures · 25,062 passengers
78.0%
Load
March 2026
395 departures · 26,797 passengers
82.0%
Load
April 2026
418 departures · 25,392 passengers
80.7%
Load
May 2026
540 departures · 31,841 passengers
79.0%
Load
June 2026
446 departures · 27,103 passengers
81.1%
Load
July 2026
467 departures · 27,728 passengers
78.1%
Load
By direction
Each direction is filed separately — they rarely match.
PSC → SEA
78.2% full
235 departures · 14,065 passengers
SEA → PSC
77.9% full
232 departures · 13,663 passengers
Nonstop PSC–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 Pasco (PSC) from Seattle (SEA)?
PSC to SEA is 172 miles (276 km / 149 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from PSC to SEA?
A nonstop covers the 172-mile great-circle distance in roughly 1h 09m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies PSC–SEA?
In July 2026, the Embraer E175 flew the largest share of departures (99.6%), followed by the Airbus A321neo (0.2%).
What mileage do I earn flying PSC–SEA?
Distance-based programs credit off the 172-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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