Atpwannebe
That's correct, Canada will deny entry to those with felony convictions, in Canada, a DUI is a felony and they will deny entry. Many instances of this happening to US pilots, sometimes they have required the pilot to leave by commercial air, as a passenger, and a replacement pilot was sen in. I am not sure of any 5 year "look back" rule, either, DUI can be older than that and be denied entry.
GF