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FSI to RAP: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Rapid City (Rapid City Regional Airport)
695 mi
1,118 km · 604 nm
1h 59m
estimated nonstop flight time
-1h
time difference · heading north
See live FSI→RAP fares Phone-only fares on this route — call free
Flight time details
695 miles nonstop takes roughly 1h 59m 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
- RAP — Rapid City Regional Airport · Rapid City, 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 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
Frequently asked questions
How far is FSI from RAP?
The flight distance from Fort Sill (FSI) to Rapid City (RAP) is 695 miles (1,118 km, 604 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to RAP?
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.
Are there nonstop flights from FSI to RAP?
Nonstop service on FSI–RAP depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 1h 59m nonstop estimate.
What is the time difference between Fort Sill and Rapid City?
Rapid City is 1 hour behind Fort Sill.
What is the cheapest way to fly from FSI to RAP?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–RAP that never appear on search engines, with no booking fees.
Why are some FSI to RAP fares phone-only?
Consolidator contracts let us sell certain FSI–RAP tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.