For all of you in Ottawa I'll pass along a recently discovered planning tip for those in the NCR.
I recently found out that Allegiant air now flies out of Plattsburgh NY, just south of Montreal, about a 2 1/2 - 3 hour drive from Ottawa. They fly twice a week and have fares as low as $19 each way (around $40 with taxes) with free parking at the airport. Only catch is that they fly into Sanford airport so no DME, but for that price I'll glady rent a car.