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GTF to KOS: distance & flight time
Great Falls (Great Falls International Airport) → Sihanoukville (Sihanoukville International Airport)
7,886 mi
12,691 km · 6,852 nm
15h 56m
estimated nonstop flight time
+13h
time difference · heading northwest
See live GTF→KOS fares Phone-only fares on this route — call free
Flight time details
7,886 miles nonstop takes roughly 15h 56m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 13-hour time gain when reading arrival times on your ticket.
The two airports
- GTF — Great Falls International Airport · Great Falls, United States
- KOS — Sihanoukville International Airport · Sihanoukville, Cambodia
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 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
Near KOS
- PQC · Phu Quoc International Airport37 mi away
- PNH · Phnom Penh International Airport106 mi away
- VKG · Rach Gia Airport110 mi away
- KZC · Kampong Chhnang Airport132 mi away
Frequently asked questions
How far is GTF from KOS?
The flight distance from Great Falls (GTF) to Sihanoukville (KOS) is 7,886 miles (12,691 km, 6,852 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GTF to KOS?
A nonstop flight takes about 15h 56m 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 Great Falls and Sihanoukville?
Sihanoukville is 13 hours ahead of Great Falls.
What is the cheapest way to fly from GTF to KOS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GTF–KOS that never appear on search engines, with no booking fees.