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FSI to IDA: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Idaho Falls (Idaho Falls Regional Airport)
953 mi
1,534 km · 828 nm
2h 32m
estimated nonstop flight time
-1h
time difference · heading northwest
See live FSI→IDA fares Phone-only fares on this route — call free
Flight time details
953 miles nonstop takes roughly 2h 32m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, United States
- IDA — Idaho Falls Regional Airport · Idaho Falls, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near FSI
- LAW · Lawton Fort Sill Regional Airport6 mi away
- DUC · Halliburton Field28 mi away
- HBR · Hobart Regional Airport44 mi away
- SPS · Sheppard Air Force Base-Wichita Falls Municipal Airport46 mi away
Near IDA
- PIH · Pocatello Regional Airport49 mi away
- JAC · Jackson Hole Airport67 mi away
- WYS · Yellowstone Airport94 mi away
- BYI · Burley Municipal Airport109 mi away
Frequently asked questions
How far is FSI from IDA?
The flight distance from Fort Sill (FSI) to Idaho Falls (IDA) is 953 miles (1,534 km, 828 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to IDA?
A nonstop flight takes about 2h 32m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Fort Sill and Idaho Falls?
Idaho Falls is 1 hour behind Fort Sill.
What is the cheapest way to fly from FSI to IDA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–IDA that never appear on search engines, with no booking fees.