Air Canada will suspend flights to JFK airport in New York from both Toronto and Montreal. The suspension will take place starting June 1 and last through October. This is due to rising fuel costs.
Air Canada will continue its flights to LaGuardia (LGA) and Newark (EWR).
The airline is also suspending some domestic routes as well.
https://www.cbc.ca/news/canada/air-canada-jet-fuel-flights-9.7167904
KLM and SAS have announced they will cancel some flights over the next few months on less profitable routes but gave not specifics. They did say passengers on those flights will be moved to the next available flight.
Delta will suspend seasonal service between Detroit and Reykjavic. Flights between JFK and Memphis and JFK and ST Louis will also be cut.