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FNL to ACI: distance & flight time
Fort Collins (Northern Colorado Regional Airport) → Alderney (Alderney Airport)
4,650 mi
7,484 km · 4,041 nm
9h 35m
estimated nonstop flight time
+7h
time difference · heading northeast
See live FNL→ACI fares Phone-only fares on this route — call free
Flight time details
4,650 miles nonstop takes roughly 9h 35m 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
- ACI — Alderney Airport · Alderney, Guernsey
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 ACI
- GCI · Guernsey Airport26 mi away
- JER · Jersey Airport34 mi away
- CER · Cherbourg-Maupertus Airport34 mi away
- GFR · Granville Airport64 mi away
Frequently asked questions
How far is FNL from ACI?
The flight distance from Fort Collins (FNL) to Alderney (ACI) is 4,650 miles (7,484 km, 4,041 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FNL to ACI?
A nonstop flight takes about 9h 35m 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 Alderney?
Alderney is 7 hours ahead of Fort Collins.
What is the cheapest way to fly from FNL to ACI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FNL–ACI that never appear on search engines, with no booking fees.