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APA to USN: distance & flight time
Denver (Centennial Airport) → Ulsan (Ulsan Airport)
6,202 mi
9,981 km · 5,390 nm
12h 38m
estimated nonstop flight time
+15h
time difference · heading northwest
See live APA→USN fares Phone-only fares on this route — call free
Flight time details
6,202 miles nonstop takes roughly 12h 38m 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
- APA — Centennial Airport · Denver, 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 APA
- DEN · Denver International Airport22 mi away
- BFK · Buckley Air Force Base10 mi away
- BJC · Rocky Mountain Metropolitan Airport27 mi away
- WBU · Boulder Municipal 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 APA from USN?
The flight distance from Denver (APA) to Ulsan (USN) is 6,202 miles (9,981 km, 5,390 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from APA to USN?
A nonstop flight takes about 12h 38m 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 Denver and Ulsan?
Ulsan is 15 hours ahead of Denver.
What is the cheapest way to fly from APA to USN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on APA–USN that never appear on search engines, with no booking fees.