The are 7 different ways across 3 unique modes of transportation to help you travel from Montréal to Beauchampville. If you're only considering the price, you should check out the bus out of Montreal towards Ottawa, as it is the cheapest to Beauchampville. It's common to find tickets for as low as $16. Greyhound operates from Montréal to Beauchampville, so you book your trip with them! Book as soon as you can, as there may be limited availability.
On your trip from Montréal to Beauchampville, it is best to book as soon as possible. It won't necessarily help reduce your price by a large amount, but will ensure that you have a spot on the bus or train.