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KEF to WBU: distance & flight time
Keflavik (Keflavik International Airport) → Boulder (Boulder Municipal Airport)
3,565 mi
5,737 km · 3,098 nm
7h 27m
estimated nonstop flight time
-6h
time difference · heading west
See live KEF→WBU fares Phone-only fares on this route — call free
Flight time details
3,565 miles nonstop takes roughly 7h 27m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time set-back when reading arrival times on your ticket.
The two airports
- KEF — Keflavik International Airport · Keflavik, Iceland
- WBU — Boulder Municipal Airport · Boulder, 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 KEF
- RKV · Reykjavik Airport22 mi away
- GUU · Grundarfjörður Airport72 mi away
- VEY · Vestmannaeyjar Airport81 mi away
- PFJ · Patreksfjörður Airport116 mi away
Near WBU
- DEN · Denver International Airport32 mi away
- BJC · Rocky Mountain Metropolitan Airport11 mi away
- FNL · Northern Colorado Regional Airport31 mi away
- BFK · Buckley Air Force Base34 mi away
Frequently asked questions
How far is KEF from WBU?
The flight distance from Keflavik (KEF) to Boulder (WBU) is 3,565 miles (5,737 km, 3,098 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from KEF to WBU?
A nonstop flight takes about 7h 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 Keflavik and Boulder?
Boulder is 6 hours behind Keflavik.
What is the cheapest way to fly from KEF to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on KEF–WBU that never appear on search engines, with no booking fees.