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BOI to GRF: distance & flight time
Boise (Boise Air Terminal/Gowen Field) → Fort Lewis (Gray Army Air Field)
393 mi
632 km · 341 nm
1h 30m
estimated nonstop flight time
-1h
time difference · heading northwest
See live BOI→GRF fares Phone-only fares on this route — call free
Flight time details
393 miles nonstop takes roughly 1h 30m 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
- BOI — Boise Air Terminal/Gowen Field · Boise, United States
- GRF — Gray Army Air Field · Fort Lewis, 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 GRF
- SEA · Seattle Tacoma International Airport29 mi away
- TCM · McChord Air Force Base6 mi away
- TIW · Tacoma Narrows Airport13 mi away
- OLM · Olympia Regional Airport17 mi away
Frequently asked questions
How far is BOI from GRF?
The flight distance from Boise (BOI) to Fort Lewis (GRF) is 393 miles (632 km, 341 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BOI to GRF?
A nonstop flight takes about 1h 30m 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 Boise and Fort Lewis?
Fort Lewis is 1 hour behind Boise.
What is the cheapest way to fly from BOI to GRF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BOI–GRF that never appear on search engines, with no booking fees.