Sarnia Chris Hadfield Airport (YZR) serves Sarnia, an Ontario city sitting directly across the St. Clair River from Port Huron, Michigan, connected by the Blue Water Bridge, and it is worth being upfront that this is a small regional airport with limited scheduled service and often limited or no on-site rental car desks compared with a larger commercial airport. Travelers flying into YZR should check with their airline or a local Sarnia agency in advance rather than assuming a full lineup of rental counters will be waiting inside the terminal.
For a more reliable range of rental options, many travelers instead fly into London International Airport, roughly ninety minutes to the southeast, or Detroit Metropolitan Airport across the border in Michigan, a similar distance away once the Blue Water Bridge crossing and border formalities are factored in, both of which offer full commercial rental counters from major companies. Either route delivers you into Sarnia and the surrounding Lambton County countryside, a mix of petrochemical industry along the riverfront and farmland further inland, via well-maintained provincial highways.
Driving is on the right throughout Canada, and the roads connecting Sarnia to London or across the border to Detroit are generally fast, well-signed routes, though border wait times at the Blue Water Bridge can add unpredictable delays, particularly around holidays, so building in extra time is sensible if crossing into Michigan. Winters in this part of southwestern Ontario bring lake-effect snow off nearby Lake Huron, and while Ontario does not legally require winter tires, they are commonly recommended for the colder months between November and March. Fuel stations are plentiful in Sarnia and along the connecting highways to London, and given the honest limitations of YZR itself, arranging a rental in advance through a local Sarnia agency, or simply routing through London or Detroit, is the more dependable approach for most visitors to this borderland corner of Ontario.