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GTF to KEF: distance & flight time
Great Falls (Great Falls International Airport) → Keflavik (Keflavik International Airport)
3,318 mi
5,340 km · 2,884 nm
6h 58m
estimated nonstop flight time
+6h
time difference · heading northeast
See live GTF→KEF fares Phone-only fares on this route — call free
Flight time details
3,318 miles nonstop takes roughly 6h 58m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- GTF — Great Falls International Airport · Great Falls, United States
- KEF — Keflavik International Airport · Keflavik, Iceland
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 KEF
- RKV · Reykjavik Airport22 mi away
- GUU · Grundarfjörður Airport72 mi away
- VEY · Vestmannaeyjar Airport81 mi away
- PFJ · Patreksfjörður Airport116 mi away
Frequently asked questions
How far is GTF from KEF?
The flight distance from Great Falls (GTF) to Keflavik (KEF) is 3,318 miles (5,340 km, 2,884 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GTF to KEF?
A nonstop flight takes about 6h 58m 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 Keflavik?
Keflavik is 6 hours ahead of Great Falls.
What is the cheapest way to fly from GTF to KEF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GTF–KEF that never appear on search engines, with no booking fees.