Air Canada and WestJet commonly serve the Miami (All Airports) (MIAA) to Vancouver (All Airports) (YVRA) market via Canadian hubs (Toronto, Calgary) and may offer competitive one-stop options in March. American and Delta typically route passengers through U.S. hubs like Dallas-Fort Worth, Atlanta, or Seattle for one-stop connections. When comparing airlines, consider total travel time, baggage allowances, change/cancellation policies, and loyalty program benefits. For lower fares, WestJet or partner-carrier connections may be more competitive; for more convenient schedules or premium service, Air Canada or mainline US carriers could be preferable. CTA: Compare fares across carriers and read baggage/cancellation fine print before booking your March MIAA to YVRA trip.