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KLS to GTF: distance & flight time
Kelso (Southwest Washington Regional Airport) → Great Falls (Great Falls International Airport)
553 mi
890 km · 480 nm
1h 40m
estimated nonstop flight time
+1h
time difference · heading east
See live KLS→GTF fares Phone-only fares on this route — call free
Flight time details
553 miles nonstop takes roughly 1h 40m gate to gate, flying east. 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
- KLS — Southwest Washington Regional Airport · Kelso, United States
- GTF — Great Falls International Airport · Great 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 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
Near GTF
- HLN · Helena Regional Airport67 mi away
- CTB · Cut Bank International Airport91 mi away
- LWT · Lewistown Municipal Airport94 mi away
- HVR · Havre City County Airport104 mi away
Frequently asked questions
How far is KLS from GTF?
The flight distance from Kelso (KLS) to Great Falls (GTF) is 553 miles (890 km, 480 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KLS to GTF?
A nonstop flight takes about 1h 40m 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 Kelso and Great Falls?
Great Falls is 1 hour ahead of Kelso.
What is the cheapest way to fly from KLS to GTF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KLS–GTF that never appear on search engines, with no booking fees.