Need help booking?
Unpublished phone-only deals available
OSN to HEL: distance & flight time
Osan (Osan Air Base) → Helsinki (Helsinki Vantaa Airport)
4,409 mi
7,095 km · 3,831 nm
9h 7m
estimated nonstop flight time
-6h
time difference · heading northwest
See live OSN→HEL fares Phone-only fares on this route — call free
Flight time details
4,409 miles nonstop takes roughly 9h 7m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time set-back when reading arrival times on your ticket.
The two airports
- OSN — Osan Air Base · Osan, South Korea
- HEL — Helsinki Vantaa Airport · Helsinki, Finland
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 HEL
- HEM · Helsinki Malmi Airport5 mi away
- HYV · Hyvinkää Airfield23 mi away
- QLF · Lahti Vesivehmaa Airport62 mi away
- TLL · Lennart Meri Tallinn Airport63 mi away
Frequently asked questions
How far is OSN from HEL?
The flight distance from Osan (OSN) to Helsinki (HEL) is 4,409 miles (7,095 km, 3,831 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSN to HEL?
A nonstop flight takes about 9h 7m 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 Helsinki?
Helsinki is 6 hours behind Osan.
What is the cheapest way to fly from OSN to HEL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSN–HEL that never appear on search engines, with no booking fees.