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ISN to ADP: distance & flight time
Williston (Sloulin Field International Airport) → Galoya (Ampara Airport)
8,588 mi
13,820 km · 7,462 nm
17h 18m
estimated nonstop flight time
+10.5h
time difference · heading north
See live ISN→ADP fares Phone-only fares on this route — call free
Flight time details
8,588 miles nonstop takes roughly 17h 18m 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
- ADP — Ampara Airport · Galoya, 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 ADP
- BTC · Batticaloa Airport26 mi away
- HIM · Hingurakgoda Air Force Base66 mi away
- GIU · Sigiriya Air Force Base75 mi away
- WRZ · Weerawila Airport80 mi away
Frequently asked questions
How far is ISN from ADP?
The flight distance from Williston (ISN) to Galoya (ADP) is 8,588 miles (13,820 km, 7,462 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to ADP?
A nonstop flight takes about 17h 18m 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 Galoya?
Galoya is 10.5 hours ahead of Williston.
What is the cheapest way to fly from ISN to ADP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–ADP that never appear on search engines, with no booking fees.