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RDR to FSI: distance & flight time
Red River (Grand Forks Air Force Base) → Fort Sill (Henry Post Army Air Field (Fort Sill))
921 mi
1,482 km · 800 nm
2h 28m
estimated nonstop flight time
Same time
time difference · heading south
See live RDR→FSI fares Phone-only fares on this route — call free
Flight time details
921 miles nonstop takes roughly 2h 28m 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
- RDR — Grand Forks Air Force Base · Red River, United States
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, 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 RDR
- GFK · Grand Forks International Airport10 mi away
- TVF · Thief River Falls Regional Airport57 mi away
- PMB · Pembina Municipal Airport68 mi away
- DVL · Devils Lake Regional Airport70 mi away
Near FSI
- LAW · Lawton Fort Sill Regional Airport6 mi away
- DUC · Halliburton Field28 mi away
- HBR · Hobart Regional Airport44 mi away
- SPS · Sheppard Air Force Base-Wichita Falls Municipal Airport46 mi away
Frequently asked questions
How far is RDR from FSI?
The flight distance from Red River (RDR) to Fort Sill (FSI) is 921 miles (1,482 km, 800 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RDR to FSI?
A nonstop flight takes about 2h 28m 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 RDR to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RDR–FSI that never appear on search engines, with no booking fees.