Need help booking?
Unpublished phone-only deals available
OSN to HLH: distance & flight time
Osan (Osan Air Base) → Ulanhot (Ulanhot Airport)
680 mi
1,094 km · 591 nm
1h 57m
estimated nonstop flight time
-1h
time difference · heading north
See live OSN→HLH fares Phone-only fares on this route — call free
Flight time details
680 miles nonstop takes roughly 1h 57m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- HLH — Ulanhot Airport · Ulanhot, China
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 OSN
- ICN · Incheon International Airport41 mi away
- SWU · Suwon Airport10 mi away
- SSN · Seoul Air Base (K-16)25 mi away
- GMP · Gimpo International Airport35 mi away
Near HLH
- DBC · Baicheng Chang'an Airport68 mi away
- NDG · Qiqihar Sanjiazi Airport116 mi away
- NZL · Chengjisihan Airport121 mi away
- YIE · Arxan Yi'ershi Airport126 mi away
Frequently asked questions
How far is OSN from HLH?
The flight distance from Osan (OSN) to Ulanhot (HLH) is 680 miles (1,094 km, 591 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to HLH?
A nonstop flight takes about 1h 57m 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 Osan and Ulanhot?
Ulanhot is 1 hour behind Osan.
What is the cheapest way to fly from OSN to HLH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–HLH that never appear on search engines, with no booking fees.