Idaho Falls (IDA) to Seattle (SEA)
Flight time
≈ 1h 56m
Bearing
302° NW
Idaho Falls (IDA) to Seattle (SEA) is 565 miles (909 km) as the crow flies — the great-circle baseline most distance-based mileage programs credit.
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What actually flies IDA–SEA
Filed traffic dataIn May 2026, SkyWest Airlines operated the most departures, one of 2 carriers flying nonstop IDA–SEA; the Embraer E175 was the most common aircraft at 100% of departures; flights ran 83% full.
Departures
124
May 2026
Seats
9,424
both directions
Passengers
7,845
both directions
Load factor
83.2%
RPM ÷ ASM
Who flies IDA–SEA?
SkyWest Airlines operated the most nonstop IDA–SEA departures in May 2026 (77), one of 2 carriers on the route.
- OO
77 departures · 5,852 seats
Share of departures62.1%83.0%
Load
- QX
47 departures · 3,572 seats
Share of departures37.9%83.7%
Load
What plane flies IDA–SEA?
In May 2026, the Embraer E175 flew 100% of IDA–SEA departures.
- Embraer E175
124 departures · 83.2% load
100.0%
How has IDA–SEA traffic changed?
Nonstop IDA–SEA departures rose from 120 in June 2025 to 124 in May 2026.
Monthly nonstop IDA–SEA traffic, trailing 12 months through May 2026. Bars scale to the busiest month; months with no filed service show as zero.
June 2025
120 departures · 8,064 passengers
88.4%
Load
July 2025
122 departures · 8,260 passengers
89.1%
Load
August 2025
124 departures · 8,424 passengers
89.4%
Load
September 2025
120 departures · 8,087 passengers
88.7%
Load
October 2025
124 departures · 7,985 passengers
84.7%
Load
November 2025
116 departures · 6,823 passengers
77.4%
Load
December 2025
109 departures · 6,772 passengers
81.8%
Load
January 2026
124 departures · 7,055 passengers
74.9%
Load
February 2026
110 departures · 6,520 passengers
78.0%
Load
March 2026
119 departures · 7,129 passengers
78.8%
Load
April 2026
120 departures · 7,367 passengers
80.8%
Load
May 2026
124 departures · 7,845 passengers
83.2%
Load
By direction
Each direction is filed separately — they rarely match.
IDA → SEA
84.5% full
62 departures · 3,984 passengers
SEA → IDA
81.9% full
62 departures · 3,861 passengers
Nonstop IDA–SEA traffic has been filed since 2025.
Source: US DOT BTS Form 41 T-100 Segment (All Carriers). Data through May 2026; filings from 2025. Public domain (US Government work).
The airports
Frequently asked
How far is Idaho Falls (IDA) from Seattle (SEA)?
IDA to SEA is 565 miles (909 km / 491 nautical miles) measured great-circle — the shortest path over the surface of the Earth.
How long is the flight from IDA to SEA?
A nonstop covers the 565-mile great-circle distance in roughly 1h 56m of block time, before winds. Actual schedules vary a few percent by direction and aircraft.
What plane flies IDA–SEA?
In May 2026, the Embraer E175 flew the largest share of departures (100.0%).
What mileage do I earn flying IDA–SEA?
Distance-based programs credit off the 565-mile great-circle figure, then apply your fare-class earning rate. Revenue-based programs credit off the fare instead.
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