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FNL to LHR: distance & flight time
Fort Collins (Northern Colorado Regional Airport) → London (London Heathrow Airport)
4,639 mi
7,466 km · 4,031 nm
9h 34m
estimated nonstop flight time
+7h
time difference · heading northeast
See live FNL→LHR fares Phone-only fares on this route — call free
Flight time details
4,639 miles nonstop takes roughly 9h 34m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time gain when reading arrival times on your ticket.
The two airports
- FNL — Northern Colorado Regional Airport · Fort Collins, United States
- LHR — London Heathrow Airport · London, United Kingdom
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 FNL
- DEN · Denver International Airport45 mi away
- GXY · Greeley–Weld County Airport20 mi away
- WBU · Boulder Municipal Airport31 mi away
- BJC · Rocky Mountain Metropolitan Airport38 mi away
Near LHR
- LGW · London Gatwick Airport25 mi away
- NHT · RAF Northolt6 mi away
- HYC · Wycombe Air Park18 mi away
- FAB · Farnborough Airport19 mi away
Frequently asked questions
How far is FNL from LHR?
The flight distance from Fort Collins (FNL) to London (LHR) is 4,639 miles (7,466 km, 4,031 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FNL to LHR?
A nonstop flight takes about 9h 34m 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 Fort Collins and London?
London is 7 hours ahead of Fort Collins.
What is the cheapest way to fly from FNL to LHR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FNL–LHR that never appear on search engines, with no booking fees.