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USN to RML: distance & flight time
Ulsan (Ulsan Airport) → Colombo (Colombo Ratmalana Airport)
3,701 mi
5,956 km · 3,216 nm
7h 43m
estimated nonstop flight time
-3.5h
time difference · heading west
See live USN→RML fares Phone-only fares on this route — call free
Flight time details
3,701 miles nonstop takes roughly 7h 43m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3.5-hour time set-back when reading arrival times on your ticket.
The two airports
- USN — Ulsan Airport · Ulsan, South Korea
- RML — Colombo Ratmalana Airport · Colombo, Sri Lanka
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 RML
- CMB · Bandaranaike International Colombo Airport25 mi away
- KCT · Koggala Airport65 mi away
- HRI · Mattala Rajapaksa International Airport93 mi away
- GIU · Sigiriya Air Force Base97 mi away
Frequently asked questions
How far is USN from RML?
The flight distance from Ulsan (USN) to Colombo (RML) is 3,701 miles (5,956 km, 3,216 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from USN to RML?
A nonstop flight takes about 7h 43m 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 Colombo?
Colombo is 3.5 hours behind Ulsan.
What is the cheapest way to fly from USN to RML?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on USN–RML that never appear on search engines, with no booking fees.