Distance From Henry Post Army Air Field (Fort Sill) to Keflavik International Airport, FSI - KEF Distance

The distance from Henry Post Army Air Field (Fort Sill) (FSI) to Keflavik International Airport (KEF) is 3674 miles or 5912 kilometers or 3190 nautical miles.

The distance shown below is direct flight distance between airports. Straight-line distance does not account for the surface between the two points. It is the distance a bird or airplane would travel between the two points when flying above the surface. The straight line distance is the direct route between two points, regardless of whether or not there are roads that connect them.

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How long does it take to travel from Fort Sill ( United States ) to Reykjavík ( Iceland )?

A one-way nonstop (direct) flight between Fort Sill and Reykjavík takes around 8 hours 26 minutes.

Estimated flight time from Henry Post Army Air Field (Fort Sill), Fort Sill, United States to Keflavik International Airport, Reykjavík, Iceland is 8 hours 26 minutes under avarage conditions. Your actual flying time may vary depending on wind direction/speed or weather conditions. This calculation does not include the departure and landing times of the aircraft. In addition, it does not cover the person identity check, ticket check-in and baggage collection times at the airport.

Travel Distance Between the Airports • FSI - KEF

Kilometers		5912 km
Statute Miles		3674 miles
Nautical Miles		3190 nm
Avg. Time of Flight		8 hours 26 minutes

Henry Post Army Air Field (Fort Sill) to Keflavik International Airport Flight Route Map - FSI to KEF Flight Path

Location of Henry Post Army Air Field (Fort Sill) & Keflavik International Airport is given below.
Click the map to view Fort Sill to Reykjavík nonstop flight path and travel direction.

Click to see flight route on Google Map between Fort Sill, United States and Reykjavík, Iceland. .

Nonstop flight route between Fort Sill, United States and Reykjavík, Iceland.

Time Difference Between the Airports • FSI - KEF

Time difference between Fort Sill (United States) and Reykjavík (Iceland) is 6 Hours.
Reykjavík time is 6 Hours ahead of Fort Sill.

Location	Local Time
Fort Sill (United States)	2026-05-04, 11:50:39 MDT
Reykjavík (Iceland)	2026-05-04, 17:50:39 GMT

Why should you arrive 3 hours before international flight? Flyers who are traveling to an international destination should arrive at the airport earlier than domestic flyers. This is because international flights can have additional check-in requirements, like passport verification, that need to be completed before you receive your boarding pass.

Origin

Henry Post Army Air Field (Fort Sill) (FSI / KFSI) Fort Sill, United States

Destination

Keflavik International Airport (KEF / BIKF) Reykjavík, Iceland