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BOI to FSI: distance & flight time
Boise (Boise Air Terminal/Gowen Field) → Fort Sill (Henry Post Army Air Field (Fort Sill))
1,133 mi
1,823 km · 985 nm
2h 56m
estimated nonstop flight time
+1h
time difference · heading southeast
See live BOI→FSI fares Phone-only fares on this route — call free
Flight time details
1,133 miles nonstop takes roughly 2h 56m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- BOI — Boise Air Terminal/Gowen Field · Boise, United States
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, 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 BOI
- MUO · Mountain Home Air Force Base40 mi away
- ONO · Ontario Municipal Airport50 mi away
- MYL · McCall Municipal Airport92 mi away
- SUN · Friedman Memorial Airport97 mi away
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
Frequently asked questions
How far is BOI from FSI?
The flight distance from Boise (BOI) to Fort Sill (FSI) is 1,133 miles (1,823 km, 985 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BOI to FSI?
A nonstop flight takes about 2h 56m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from BOI to FSI?
Nonstop service on BOI–FSI depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 2h 56m nonstop estimate.
What is the time difference between Boise and Fort Sill?
Fort Sill is 1 hour ahead of Boise.
What is the cheapest way to fly from BOI to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BOI–FSI that never appear on search engines, with no booking fees.
Why are some BOI to FSI fares phone-only?
Consolidator contracts let us sell certain BOI–FSI tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.