The are 7 different ways across 3 unique modes of transportation to help you travel from Kitchener to Troy. If you're only considering the price, you should check out the bus out of Waterloo towards Detroit, as it is the cheapest to Troy. It's common to find tickets for as low as $23. Greyhound operates from Kitchener to Troy, so you book your trip with them! Book as soon as you can, as there may be limited availability.
On your trip from Kitchener to Troy, 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.