The scheduled flight was forced to turn around due to weather.
The pilot contacted the airline at 7:21 a.m. to say the plane had landed with no major injuries.
A rescue of the pilot and six passengers is underway.
Yellowknife and Behchoko RCMP are responding near the Boundary Creek area northwest of Yellowknife, according to the RCMP.
At this point, RCMP have not reached the landing site. They're on the way there now. An RCMP spokesperson says emergency responders, fire and ambulance as well as Stanton Territorial Hospital are on standby.
The military told the Canadian Press that a Royal Canadian Air Force C-130 Hercules aircraft with search-and-rescue technicians on board was en route to the area from Winnipeg.
Other aircraft were trying to take off from Yellowknife to join the search, but were being hampered by bad weather.
Weather conditions are not good in the capital this morning. It's -19 C with freezing rain.
Buffalo Airways says it's holding some flights because of bad weather conditions.