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WBU to KLU: distance & flight time
Boulder (Boulder Municipal Airport) → Klagenfurt (Klagenfurt Airport)
5,387 mi
8,670 km · 4,681 nm
11h 2m
estimated nonstop flight time
+8h
time difference · heading northeast
See live WBU→KLU fares Phone-only fares on this route — call free
Flight time details
5,387 miles nonstop takes roughly 11h 2m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time gain when reading arrival times on your ticket.
The two airports
- WBU — Boulder Municipal Airport · Boulder, United States
- KLU — Klagenfurt Airport · Klagenfurt, Austria
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 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
Near KLU
- LJU · Ljubljana Jože Pučnik Airport29 mi away
- GRZ · Graz Airport57 mi away
- MBX · Maribor Airport65 mi away
- TRS · Trieste–Friuli Venezia Giulia Airport70 mi away
Frequently asked questions
How far is WBU from KLU?
The flight distance from Boulder (WBU) to Klagenfurt (KLU) is 5,387 miles (8,670 km, 4,681 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from WBU to KLU?
A nonstop flight takes about 11h 2m 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 Boulder and Klagenfurt?
Klagenfurt is 8 hours ahead of Boulder.
What is the cheapest way to fly from WBU to KLU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on WBU–KLU that never appear on search engines, with no booking fees.