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FSI to STL: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → St. Louis (St Louis Lambert International Airport)
527 mi
848 km · 458 nm
1h 37m
estimated nonstop flight time
Same time
time difference · heading northeast
See live FSI→STL fares Phone-only fares on this route — call free
Flight time details
527 miles nonstop takes roughly 1h 37m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, United States
- STL — St Louis Lambert International Airport · St. Louis, 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 STL
- SUS · Spirit of St Louis Airport16 mi away
- ALN · St Louis Regional Airport20 mi away
- BLV · Scott AFB/Midamerica Airport32 mi away
- SPI · Abraham Lincoln Capital Airport84 mi away
Frequently asked questions
How far is FSI from STL?
The flight distance from Fort Sill (FSI) to St. Louis (STL) is 527 miles (848 km, 458 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to STL?
A nonstop flight takes about 1h 37m 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 cheapest way to fly from FSI to STL?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–STL that never appear on search engines, with no booking fees.