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ISN to DCA: distance & flight time
Williston (Sloulin Field International Airport) → Washington (Ronald Reagan Washington National Airport)
1,471 mi
2,367 km · 1,278 nm
3h 40m
estimated nonstop flight time
+1h
time difference · heading east
See live ISN→DCA fares Phone-only fares on this route — call free
Flight time details
1,471 miles nonstop takes roughly 3h 40m gate to gate, flying east. 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
- DCA — Ronald Reagan Washington National Airport · Washington, 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 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 DCA
Frequently asked questions
How far is ISN from DCA?
The flight distance from Williston (ISN) to Washington (DCA) is 1,471 miles (2,367 km, 1,278 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to DCA?
A nonstop flight takes about 3h 40m 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 Washington?
Washington is 1 hour ahead of Williston.
What is the cheapest way to fly from ISN to DCA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–DCA that never appear on search engines, with no booking fees.