Alert Airport (IATA: YLT, ICAO: CYLT) is located at Alert, Nunavut, Canada, approximately 830 km (520 mi) south of the true North Pole.

A weather station was established on the site in 1950, and in 1957 construction began on the military facilities which are still in use as of 2024.

It is the northernmost airport in the world, although not used by public scheduled flights.

Radar and navigation equipment are trailer units that can be moved around the airport.

[4] There have been two crashes involving fatalities at the airfield since it was established.