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ISN to CCU: distance & flight time
Williston (Sloulin Field International Airport) → Kolkata (Netaji Subhash Chandra Bose International Airport)
7,486 mi
12,047 km · 6,505 nm
15h 9m
estimated nonstop flight time
+10.5h
time difference · heading north
See live ISN→CCU fares Phone-only fares on this route — call free
Flight time details
7,486 miles nonstop takes roughly 15h 9m 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
- CCU — Netaji Subhash Chandra Bose International Airport · Kolkata, India
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 CCU
- JSR · Jessore Airport58 mi away
- RDP · Kazi Nazrul Islam Airport102 mi away
- IRD · Ishurdi Airport110 mi away
- BZL · Barisal Airport119 mi away
Frequently asked questions
How far is ISN from CCU?
The flight distance from Williston (ISN) to Kolkata (CCU) is 7,486 miles (12,047 km, 6,505 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to CCU?
A nonstop flight takes about 15h 9m 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 Kolkata?
Kolkata is 10.5 hours ahead of Williston.
What is the cheapest way to fly from ISN to CCU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–CCU that never appear on search engines, with no booking fees.