Need help booking?
Unpublished phone-only deals available
GAO to FSI: distance & flight time
Guantanamo (Mariana Grajales Airport) → Fort Sill (Henry Post Army Air Field (Fort Sill))
1,738 mi
2,797 km · 1,510 nm
3h 52m
estimated nonstop flight time
-1h
time difference · heading northwest
See live GAO→FSI fares Phone-only fares on this route — call free
Flight time details
1,738 miles nonstop takes roughly 3h 52m 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
- GAO — Mariana Grajales Airport · Guantanamo, Cuba
- 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 GAO
- NBW · Leeward Point Field13 mi away
- MOA · Orestes Acosta Airport42 mi away
- SCU · Antonio Maceo International Airport45 mi away
- BCA · Gustavo Rizo Airport46 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 GAO from FSI?
The flight distance from Guantanamo (GAO) to Fort Sill (FSI) is 1,738 miles (2,797 km, 1,510 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GAO to FSI?
A nonstop flight takes about 3h 52m 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 Guantanamo and Fort Sill?
Fort Sill is 1 hour behind Guantanamo.
What is the cheapest way to fly from GAO to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GAO–FSI that never appear on search engines, with no booking fees.