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BOI to KLS: distance & flight time
Boise (Boise Air Terminal/Gowen Field) → Kelso (Southwest Washington Regional Airport)
371 mi
598 km · 323 nm
1h 27m
estimated nonstop flight time
-1h
time difference · heading northwest
See live BOI→KLS fares Phone-only fares on this route — call free
Flight time details
371 miles nonstop takes roughly 1h 27m 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
- KLS — Southwest Washington Regional Airport · Kelso, 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 KLS
- PDX · Portland International Airport39 mi away
- CLS · Chehalis Centralia Airport39 mi away
- HIO · Portland Hillsboro Airport40 mi away
- TTD · Portland Troutdale Airport46 mi away
Frequently asked questions
How far is BOI from KLS?
The flight distance from Boise (BOI) to Kelso (KLS) is 371 miles (598 km, 323 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BOI to KLS?
A nonstop flight takes about 1h 27m 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 Kelso?
Kelso is 1 hour behind Boise.
What is the cheapest way to fly from BOI to KLS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BOI–KLS that never appear on search engines, with no booking fees.