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ISN to CMB: distance & flight time
Williston (Sloulin Field International Airport) → Colombo (Bandaranaike International Colombo Airport)
8,606 mi
13,850 km · 7,478 nm
17h 20m
estimated nonstop flight time
+10.5h
time difference · heading north
See live ISN→CMB fares Phone-only fares on this route — call free
Flight time details
8,606 miles nonstop takes roughly 17h 20m 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 gain when reading arrival times on your ticket.
The two airports
- ISN — Sloulin Field International Airport · Williston, United States
- CMB — Bandaranaike International Colombo 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 ISN
- SDY · Sidney - Richland Regional Airport41 mi away
- YEN · Estevan Airport78 mi away
- OLF · L M Clayton Airport89 mi away
- GDV · Dawson Community Airport90 mi away
Near CMB
- RML · Colombo Ratmalana Airport25 mi away
- GIU · Sigiriya Air Force Base79 mi away
- ACJ · Anuradhapura Air Force Base86 mi away
- KCT · Koggala Airport87 mi away
Frequently asked questions
How far is ISN from CMB?
The flight distance from Williston (ISN) to Colombo (CMB) is 8,606 miles (13,850 km, 7,478 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to CMB?
A nonstop flight takes about 17h 20m 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 Williston and Colombo?
Colombo is 10.5 hours ahead of Williston.
What is the cheapest way to fly from ISN to CMB?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–CMB that never appear on search engines, with no booking fees.