u/ElkOpening6450

My family and I will be traveling to Canada by the end of the month and will make a road trip from Toronto to Montreal, the plan is to stop at Ottawa and Quebec. Thing is it is being really hard to find a car to rent in Toronto and return it Montreal, seems that drop off at a different city is not possible. i have done that in several other places with no problem. Am I looking at the wrong rental companies or this is something specific to canada? Sounds silly but I’m starting getting nervous for not getting the car reserved.
Thanks