A post by @FirstSquawk on X.

Air Canada said U.S. airspace restrictions may disrupt flights linking Canada with the Caribbean and South America. The carrier did not specify the scope of the restrictions or quantify the number of affected routes and passengers. The warning matters because these connecting services rely on U.S. airspace, so any constraint could lengthen routings, raise fuel and crew costs, and ripple through schedules. Watch for Air Canada to detail which routes are affected, whether it reroutes or trims frequencies, and whether it quantifies any cost or capacity impact in its next update.