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FSI to SPF: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Spearfish-South Dakota (Black Hills Airport-Clyde Ice Field)
737 mi
1,186 km · 640 nm
2h 4m
estimated nonstop flight time
-1h
time difference · heading north
See live FSI→SPF fares Phone-only fares on this route — call free
Flight time details
737 miles nonstop takes roughly 2h 4m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time set-back when reading arrival times on your ticket.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, United States
- SPF — Black Hills Airport-Clyde Ice Field · Spearfish-South Dakota, 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 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
Near SPF
- RCA · Ellsworth Air Force Base41 mi away
- RAP · Rapid City Regional Airport47 mi away
- GCC · Gillette Campbell County Airport87 mi away
- CDR · Chadron Municipal Airport119 mi away
Frequently asked questions
How far is FSI from SPF?
The flight distance from Fort Sill (FSI) to Spearfish-South Dakota (SPF) is 737 miles (1,186 km, 640 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to SPF?
A nonstop flight takes about 2h 4m 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 Fort Sill and Spearfish-South Dakota?
Spearfish-South Dakota is 1 hour behind Fort Sill.
What is the cheapest way to fly from FSI to SPF?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–SPF that never appear on search engines, with no booking fees.