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FLF to WBU: distance & flight time
Flensburg (Flensburg-Schäferhaus Airport) → Boulder (Boulder Municipal Airport)
4,838 mi
7,786 km · 4,204 nm
9h 57m
estimated nonstop flight time
-8h
time difference · heading northwest
See live FLF→WBU fares Phone-only fares on this route — call free
Flight time details
4,838 miles nonstop takes roughly 9h 57m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 8-hour time set-back when reading arrival times on your ticket.
The two airports
- FLF — Flensburg-Schäferhaus Airport · Flensburg, Germany
- 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 FLF
- SGD · Sønderborg Airport21 mi away
- WBG · Schleswig Air Base22 mi away
- SKS · Skrydstrup Air Base31 mi away
- KEL · Kiel-Holtenau Airport41 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 FLF from WBU?
The flight distance from Flensburg (FLF) to Boulder (WBU) is 4,838 miles (7,786 km, 4,204 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FLF to WBU?
A nonstop flight takes about 9h 57m 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 Flensburg and Boulder?
Boulder is 8 hours behind Flensburg.
What is the cheapest way to fly from FLF to WBU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FLF–WBU that never appear on search engines, with no booking fees.