Need help booking?
Unpublished phone-only deals available
USN to CPR: distance & flight time
Ulsan (Ulsan Airport) → Casper (Casper-Natrona County International Airport)
5,974 mi
9,615 km · 5,192 nm
12h 11m
estimated nonstop flight time
-15h
time difference · heading northeast
See live USN→CPR fares Phone-only fares on this route — call free
Flight time details
5,974 miles nonstop takes roughly 12h 11m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 15-hour time set-back when reading arrival times on your ticket.
The two airports
- USN — Ulsan Airport · Ulsan, South Korea
- CPR — Casper-Natrona County International Airport · Casper, 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 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
Near CPR
- RWL · Rawlins Municipal Airport/Harvey Field85 mi away
- RIW · Riverton Regional Airport101 mi away
- SAA · Shively Field103 mi away
- WRL · Worland Municipal Airport104 mi away
Frequently asked questions
How far is USN from CPR?
The flight distance from Ulsan (USN) to Casper (CPR) is 5,974 miles (9,615 km, 5,192 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USN to CPR?
A nonstop flight takes about 12h 11m 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 Ulsan and Casper?
Casper is 15 hours behind Ulsan.
What is the cheapest way to fly from USN to CPR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USN–CPR that never appear on search engines, with no booking fees.