Need help booking?
Unpublished phone-only deals available
FSI to GRS: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Grosseto (Grosseto Air Base)
5,483 mi
8,824 km · 4,765 nm
11h 13m
estimated nonstop flight time
+7h
time difference · heading northeast
See live FSI→GRS fares Phone-only fares on this route — call free
Flight time details
5,483 miles nonstop takes roughly 11h 13m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 7-hour time gain when reading arrival times on your ticket.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, United States
- GRS — Grosseto Air Base · Grosseto, Italy
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 GRS
- SAY · Siena-Ampugnano Airport36 mi away
- EBA · Marina Di Campo Airport42 mi away
- FCO · Leonardo da Vinci–Fiumicino Airport89 mi away
- PSA · Pisa International Airport72 mi away
Frequently asked questions
How far is FSI from GRS?
The flight distance from Fort Sill (FSI) to Grosseto (GRS) is 5,483 miles (8,824 km, 4,765 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to GRS?
A nonstop flight takes about 11h 13m 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 Grosseto?
Grosseto is 7 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to GRS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–GRS that never appear on search engines, with no booking fees.