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ISN to SJU: distance & flight time
Williston (Sloulin Field International Airport) → San Juan (Luis Munoz Marin International Airport)
2,940 mi
4,732 km · 2,555 nm
6h 14m
estimated nonstop flight time
+1h
time difference · heading southeast
See live ISN→SJU fares Phone-only fares on this route — call free
Flight time details
2,940 miles nonstop takes roughly 6h 14m gate to gate, flying southeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- ISN — Sloulin Field International Airport · Williston, United States
- SJU — Luis Munoz Marin International Airport · San Juan, Puerto Rico
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 SJU
- SIG · Fernando Luis Ribas Dominicci Airport6 mi away
- FAJ · Diego Jimenez Torres Airport24 mi away
- NRR · José Aponte de la Torre Airport27 mi away
- VQS · Vieques Airport44 mi away
Frequently asked questions
How far is ISN from SJU?
The flight distance from Williston (ISN) to San Juan (SJU) is 2,940 miles (4,732 km, 2,555 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to SJU?
A nonstop flight takes about 6h 14m 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 San Juan?
San Juan is 1 hour ahead of Williston.
What is the cheapest way to fly from ISN to SJU?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–SJU that never appear on search engines, with no booking fees.