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GYY to FSI: distance & flight time
Gary (Gary Chicago International Airport) → Fort Sill (Henry Post Army Air Field (Fort Sill))
766 mi
1,233 km · 666 nm
2h 8m
estimated nonstop flight time
Same time
time difference · heading southwest
See live GYY→FSI fares Phone-only fares on this route — call free
Flight time details
766 miles nonstop takes roughly 2h 8m gate to gate, flying southwest. 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
- GYY — Gary Chicago International Airport · Gary, United States
- 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 GYY
- ORD · Chicago O'Hare International Airport36 mi away
- CGX · Chicago Meigs Airport20 mi away
- MDW · Chicago Midway International Airport21 mi away
- VPZ · Porter County Municipal Airport24 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 GYY from FSI?
The flight distance from Gary (GYY) to Fort Sill (FSI) is 766 miles (1,233 km, 666 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GYY to FSI?
A nonstop flight takes about 2h 8m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from GYY to FSI?
Nonstop service on GYY–FSI depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 2h 8m nonstop estimate.
What is the cheapest way to fly from GYY to FSI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GYY–FSI that never appear on search engines, with no booking fees.
Why are some GYY to FSI fares phone-only?
Consolidator contracts let us sell certain GYY–FSI tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.