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FSI to SUS: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Null (Spirit of St Louis Airport)
511 mi
822 km · 444 nm
1h 35m
estimated nonstop flight time
Same time
time difference · heading northeast
See live FSI→SUS fares Phone-only fares on this route — call free
Flight time details
511 miles nonstop takes roughly 1h 35m 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
- SUS — Spirit of St Louis Airport · Null, 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 SUS
- STL · St Louis Lambert International Airport16 mi away
- ALN · St Louis Regional Airport36 mi away
- BLV · Scott AFB/Midamerica Airport45 mi away
- JEF · Jefferson City Memorial Airport81 mi away
Frequently asked questions
How far is FSI from SUS?
The flight distance from Fort Sill (FSI) to Null (SUS) is 511 miles (822 km, 444 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to SUS?
A nonstop flight takes about 1h 35m 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 SUS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–SUS that never appear on search engines, with no booking fees.