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FSI to LHR: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → London (London Heathrow Airport)
4,701 mi
7,566 km · 4,085 nm
9h 41m
estimated nonstop flight time
+6h
time difference · heading northeast
See live FSI→LHR fares Phone-only fares on this route — call free
Flight time details
4,701 miles nonstop takes roughly 9h 41m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-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
- LHR — London Heathrow Airport · London, United Kingdom
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 LHR
- LGW · London Gatwick Airport25 mi away
- NHT · RAF Northolt6 mi away
- HYC · Wycombe Air Park18 mi away
- FAB · Farnborough Airport19 mi away
Frequently asked questions
How far is FSI from LHR?
The flight distance from Fort Sill (FSI) to London (LHR) is 4,701 miles (7,566 km, 4,085 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to LHR?
A nonstop flight takes about 9h 41m 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 London?
London is 6 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to LHR?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–LHR that never appear on search engines, with no booking fees.