Distance From Southwest Washington Regional Airport to Buffalo Niagara International Airport, KLS - BUF Distance

The distance from Southwest Washington Regional Airport (KLS) to Buffalo Niagara International Airport (BUF) is 2159 miles or 3474 kilometers or 1875 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 Kelso ( United States ) to Buffalo ( United States )?

A one-way nonstop (direct) flight between Kelso and Buffalo takes around 4 hours 57 minutes.

Estimated flight time from Southwest Washington Regional Airport, Kelso, United States to Buffalo Niagara International Airport, Buffalo, United States is 4 hours 57 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 • KLS - BUF

Kilometers		3474 km
Statute Miles		2159 miles
Nautical Miles		1875 nm
Avg. Time of Flight		4 hours 57 minutes

Southwest Washington Regional Airport to Buffalo Niagara International Airport Flight Route Map - KLS to BUF Flight Path

Location of Southwest Washington Regional Airport & Buffalo Niagara International Airport is given below.
Click the map to view Kelso to Buffalo nonstop flight path and travel direction.

Click to see flight route on Google Map between Kelso, United States and Buffalo, United States. .

Nonstop flight route between Kelso, United States and Buffalo, United States.

Time Difference Between the Airports • KLS - BUF

Time difference between Kelso (United States) and Buffalo (United States) is 2 Hours.
Buffalo time is 2 Hours ahead of Kelso.

Location	Local Time
Kelso (United States)	2025-12-14, 20:53:52 MST
Buffalo (United States)	2025-12-14, 22:53:52 EST

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

Southwest Washington Regional Airport (KLS / KKLS) Kelso, United States

Destination

Buffalo Niagara International Airport (BUF / KBUF) Buffalo, United States