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FSI to DEN: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Denver (Denver International Airport)
498 mi
802 km · 433 nm
1h 33m
estimated nonstop flight time
-1h
time difference · heading northwest
See live FSI→DEN fares Phone-only fares on this route — call free
Flight time details
498 miles nonstop takes roughly 1h 33m gate to gate, flying northwest. 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
- DEN — Denver International Airport · Denver, 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 DEN
- BFK · Buckley Air Force Base12 mi away
- APA · Centennial Airport22 mi away
- BJC · Rocky Mountain Metropolitan Airport24 mi away
- WBU · Boulder Municipal Airport32 mi away
Frequently asked questions
How far is FSI from DEN?
The flight distance from Fort Sill (FSI) to Denver (DEN) is 498 miles (802 km, 433 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to DEN?
A nonstop flight takes about 1h 33m 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 Denver?
Denver is 1 hour behind Fort Sill.
What is the cheapest way to fly from FSI to DEN?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–DEN that never appear on search engines, with no booking fees.