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RML to CSM: distance & flight time
Colombo (Colombo Ratmalana Airport) → Clinton (Clinton Sherman Airport)
9,523 mi
15,326 km · 8,275 nm
19h 8m
estimated nonstop flight time
-10.5h
time difference · heading north
See live RML→CSM fares Phone-only fares on this route — call free
Flight time details
9,523 miles nonstop takes roughly 19h 8m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 10.5-hour time set-back when reading arrival times on your ticket.
The two airports
- RML — Colombo Ratmalana Airport · Colombo, Sri Lanka
- CSM — Clinton Sherman Airport · Clinton, 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 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
Near CSM
- HBR · Hobart Regional Airport26 mi away
- LTS · Altus Air Force Base47 mi away
- FSI · Henry Post Army Air Field (Fort Sill)66 mi away
- LAW · Lawton Fort Sill Regional Airport69 mi away
Frequently asked questions
How far is RML from CSM?
The flight distance from Colombo (RML) to Clinton (CSM) is 9,523 miles (15,326 km, 8,275 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RML to CSM?
A nonstop flight takes about 19h 8m 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 Colombo and Clinton?
Clinton is 10.5 hours behind Colombo.
What is the cheapest way to fly from RML to CSM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RML–CSM that never appear on search engines, with no booking fees.