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 July 2026, SkyWest Airlines was the only carrier flying nonstop IDA–SEA; the Embraer E175 was the most common aircraft at 100% of departures; flights ran 86% full.
Departures
124
July 2026
Seats
9,424
both directions
Passengers
8,092
both directions
Load factor
85.9%
RPM ÷ ASM
Who flies IDA–SEA?
SkyWest Airlines was the only carrier to fly nonstop IDA–SEA in July 2026 (124 departures).
- OO
124 departures · 9,424 seats
Share of departures100.0%85.9%
Load
What plane flies IDA–SEA?
In July 2026, the Embraer E175 flew 100% of IDA–SEA departures.
- Embraer E175
124 departures · 85.9% load
100.0%
How has IDA–SEA traffic changed?
Nonstop IDA–SEA departures held steady at about 124 a month between August 2025 and July 2026.
Monthly nonstop IDA–SEA traffic, trailing 12 months through July 2026. Bars scale to the busiest month; months with no filed service show as zero.
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
June 2026
120 departures · 7,724 passengers
84.7%
Load
July 2026
124 departures · 8,092 passengers
85.9%
Load
By direction
Each direction is filed separately — they rarely match.
IDA → SEA
89.4% full
62 departures · 4,212 passengers
SEA → IDA
82.3% full
62 departures · 3,880 passengers
Nonstop IDA–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 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 July 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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