The Royal Canadian Mounted Police said it received a call about the accident at 8:50 a.m., the Canadian Broadcasting Corp. reported.
The QMI Agency reported one of the planes was a Piper PA-28 bound from Calgary, Alberta, to St. Brieux with two men and one young male on board. The second plane was an amphibious Lake LA-4 carrying a man and woman who were en route from Regina to La Ronge, Saskatchewan.
Debris was spread for miles, with the wreckage of one plane found in a swampy area surrounded by trees and the other discovered in a wooded swamp a few miles away.
The news agency said the accident occurred near a small landing strip.
The Transportation Safety Board of Canada was to investigate the cause of the crash.
Kate Middleton recycles dress at movie premiere
Benedict Cumberbatch's dramatic reading of R. Kelly lyrics is just what you need