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RAP to FSI: distance & flight time
Rapid City (Rapid City Regional Airport) → Fort Sill (Henry Post Army Air Field (Fort Sill))
695 mi
1,118 km · 604 nm
1h 59m
estimated nonstop flight time
+1h
time difference · heading south
See live RAP→FSI fares Phone-only fares on this route — call free
Flight time details
695 miles nonstop takes roughly 1h 59m gate to gate, flying south. 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
- RAP — Rapid City Regional Airport · Rapid City, 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
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Near RAP
- RCA · Ellsworth Air Force Base7 mi away
- SPF · Black Hills Airport-Clyde Ice Field47 mi away
- CDR · Chadron Municipal Airport83 mi away
- GCC · Gillette Campbell County Airport125 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 RAP from FSI?
The flight distance from Rapid City (RAP) to Fort Sill (FSI) is 695 miles (1,118 km, 604 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from RAP to FSI?
A nonstop flight takes about 1h 59m 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 Rapid City and Fort Sill?
Fort Sill is 1 hour ahead of Rapid City.
What is the cheapest way to fly from RAP to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on RAP–FSI that never appear on search engines, with no booking fees.