I saw this news story when it first broke. Since confirmed here in the NYT:

By Vjosa Isai and Christine Chung
Vjosa Isai reported from Toronto and Christine Chung from New York.

March 28, 2025
Airlines are having to revamp their plans ahead of the peak summer travel season as Canadians avoid trips to the United States amid an escalating trade war between the two neighbors.

A grass roots effort by Canadians to boycott all things American — from U.S. grocery products and alcohol to tourist hot spots — had already set off alarms across the United States travel industry, which warned of multibillion-dollar losses.[/quote]

[mod edit]

I foresee two broad implications of this trend:

1. less need for narrow body aircraft;
2. more opportunities for airlines operating out of Cdn. gateways to Australiasia, Europe. & South America.