Britton Municipal Airport (IATA: TTO, ICAO: KBTN, FAA LID: BTN) is a city-owned, public-use airport located two nautical miles (3.7 km) northeast of the central business district of Britton, a city in Marshall County, South Dakota, United States.

[2] Although many U.S. airports use the same three-letter location identifier for the FAA and IATA, this airport is assigned BTN by the FAA and TTO by the IATA[3] (which assigned BTN to Marlboro County Jetport in Bennettsville, South Carolina[4]).

Britton Municipal Airport covers an area of 192 acres (78 ha) at an elevation of 1,318 feet (402 m) above mean sea level.

[1] For the 12-month period ending April 28, 2022, the airport had 2,240 general aviation aircraft operations, an average of 43 per week.

At that time there were 10 aircraft based at this airport: 8 single-engine and 2 multi-engine.