Hi!
I know you've booked your flight already ... But I am from Montreal too!
I went to Disney for the first time in Aug and just returned before Xmas.
I couldn't get anything at a decent price leaving Direct from Montreal ... Until
I came across Burlington airport.
I've used JetBlue both times and for a family of 3 came to 627$ the 1st time (Aug) and 538$ in Dec right before Xmas.
These are direct flights 3 hrs or so.
Okay from my house its a 1h30 minute ride but to me well worth it considering I couldn't find anything under 600$/person from Montreal
I saved over a 1000$.
Anyway just wanted to let you guys know ... maybe for next time !
PS. Parking at the airport is 10$ a day or they have a little car dealer next to the airport at 8$/ with internet coupon .... They even wash your car ... to me that was awesome !