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FNL to USN: distance & flight time
Fort Collins (Northern Colorado Regional Airport) → Ulsan (Ulsan Airport)
6,151 mi
9,899 km · 5,345 nm
12h 32m
estimated nonstop flight time
+15h
time difference · heading northwest
See live FNL→USN fares Phone-only fares on this route — call free
Flight time details
6,151 miles nonstop takes roughly 12h 32m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time gain when reading arrival times on your ticket.
The two airports
- FNL — Northern Colorado Regional Airport · Fort Collins, United States
- USN — Ulsan Airport · Ulsan, South Korea
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 USN
- KPO · Pohang Airport (G-815/K-3)28 mi away
- PUS · Gimhae International Airport37 mi away
- TAE · Daegu Airport44 mi away
- CHF · Jinhae Airbase/Airport (G-813/K-10)48 mi away
Frequently asked questions
How far is FNL from USN?
The flight distance from Fort Collins (FNL) to Ulsan (USN) is 6,151 miles (9,899 km, 5,345 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FNL to USN?
A nonstop flight takes about 12h 32m 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 Ulsan?
Ulsan is 15 hours ahead of Fort Collins.
What is the cheapest way to fly from FNL to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FNL–USN that never appear on search engines, with no booking fees.