en.Wedoany.com Reported - Data for the busiest US-Canada cross-border routes in June has been released. LaGuardia Airport (LGA) to Toronto Pearson International Airport (YYZ) topped the list with 682 scheduled flights, followed by Chicago O'Hare International Airport (ORD) to Toronto Pearson International Airport (YYZ) and Seattle-Tacoma International Airport (SEA) to Vancouver International Airport (YVR) in second and third place, respectively.
According to data from aviation analytics firm Cirium, there were a total of 14,283 scheduled flights from US airports to Canada in June. Canada has historically been one of the most important markets for US airlines, with geographical proximity allowing regional carriers and low-cost airlines from both countries to compete alongside traditional airlines.

On the LGA-YYZ route, 682 flights are scheduled, with Air Canada operating 285, Delta Air Lines operating 165, American Airlines operating 146, and Porter Airlines operating 86. On the ORD-YYZ route, 526 flights are scheduled, with United Airlines operating 286, American Airlines operating 150, and Air Canada operating 148. On the SEA-YVR route, 500 flights are scheduled, with Alaska Airlines dominating the route with 201 flights, Delta Air Lines operating 180, and Air Canada operating 119. The total number of flights operated in each direction across the three routes is 1,708.
When evaluating operational data by individual airline, the route focus of each carrier does not perfectly align with the total flight volume rankings. Among the top ten routes by total flight volume, six have US origin points that are United Airlines hubs, and all ten have Canadian destinations that are Air Canada hubs. In North American cross-border operations, Star Alliance holds a dominant position, thanks to the presence of United Airlines and Air Canada and their extensive regional and cross-border networks. United Airlines operates the most flights to Canada among US carriers, handling four out of every ten flights to Canada operated by US airlines.

The United States and Canada serve as the home bases for United Airlines and Air Canada, respectively. Both airlines are Star Alliance members and codeshare partners. This allows them to focus on their respective strengths and hubs for complementarity, rather than deploying capacity independently on every route. United Airlines and Air Canada occupy five spots in the top ten cross-border operations by individual airline, with the two carriers dominating the top three positions.

Earlier this year, due to geopolitical factors involving US tariffs imposed on Canada, Air Canada cut 10% of its flights to the United States, and other Canadian airlines also reduced capacity to varying degrees. Airlines shifted some capacity and operations to other markets, such as Mexico, where flight volumes to and from Canada increased significantly.
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