Montréal/Mascouche Airport, formerly TC LID: CSK3, was a small, general aviation airport located 1.5 nautical miles (2.8 km; 1.7 mi) southeast of Mascouche and approximately 20 km (12 mi) northeast of Montreal, Quebec, Canada. It was reached by Autoroute 640 at exit 44. The runway was parallel to Autoroute 640. Montréal/Mascouche Airport closed 15 November 2016 and all aircraft had to be removed by 13 November.

A radio equipped aircraft was required to fly in and out of Mascouche Airport. The mandatory frequency for the airport was 122.35 MHz.

Mascouche Airport was the largest "regional airport" in the province of Quebec, in terms of air traffic. It was located close to the Le Gardeur regional hospital and could be used for medical evacuations. The airport regrouped 30 buildings, 15 related SMEs (including Cargair Inc., ALM Par Avion, and others) and sustained 75 full-time jobs. More than a hundred small planes were stationed there year-round.