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ISN to GRK: distance & flight time
Williston (Sloulin Field International Airport) → Killeen (Robert Gray Army Air Field Airport)
1,221 mi
1,965 km · 1,061 nm
3h 7m
estimated nonstop flight time
Same time
time difference · heading south
See live ISN→GRK fares Phone-only fares on this route — call free
Flight time details
1,221 miles nonstop takes roughly 3h 7m gate to gate, flying south. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- ISN — Sloulin Field International Airport · Williston, United States
- GRK — Robert Gray Army Air Field Airport · Killeen, 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 GRK
- HLR · Hood Army Air Field8 mi away
- AUS · Austin Bergstrom International Airport61 mi away
- TPL · Draughon Miller Central Texas Regional Airport26 mi away
- ACT · Waco Regional Airport52 mi away
Frequently asked questions
How far is ISN from GRK?
The flight distance from Williston (ISN) to Killeen (GRK) is 1,221 miles (1,965 km, 1,061 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISN to GRK?
A nonstop flight takes about 3h 7m 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 cheapest way to fly from ISN to GRK?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISN–GRK that never appear on search engines, with no booking fees.