The one big factor to consider drive vs fly is time of year. I have always flown via Buffalo, love jet blue, and flown in Sept or Oct. This past March DW wanted to go for spring break, not a fan of crowds but keep her happy. Booked our flights 880US out of Buffalo and BAMM. Biggest snow storm of the year, we got to the airport and they said they couldn't get us out till Friday, it was Tuesday. Pack up, jump back in the car and head back to north of TO. What should have been a 3 hour drive turned into 7 hours.
This March 2015 we are trying the drive for the first time, I can drive in any snow conditions, lived in Lake Louise in the winter, so here we go.