Need help booking?
Unpublished phone-only deals available
SAT to ISN: distance & flight time
San Antonio (San Antonio International Airport) → Williston (Sloulin Field International Airport)
1,317 mi
2,120 km · 1,145 nm
3h 20m
estimated nonstop flight time
Same time
time difference · heading north
See live SAT→ISN fares Phone-only fares on this route — call free
Flight time details
1,317 miles nonstop takes roughly 3h 20m gate to gate, flying north. 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
- SAT — San Antonio International Airport · San Antonio, United States
- ISN — Sloulin Field International Airport · Williston, 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 SAT
- RND · Randolph Air Force Base11 mi away
- SKF · Lackland Air Force Base12 mi away
- SSF · Stinson Municipal Airport14 mi away
- AUS · Austin Bergstrom International Airport66 mi away
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
Frequently asked questions
How far is SAT from ISN?
The flight distance from San Antonio (SAT) to Williston (ISN) is 1,317 miles (2,120 km, 1,145 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SAT to ISN?
A nonstop flight takes about 3h 20m 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 SAT to ISN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SAT–ISN that never appear on search engines, with no booking fees.