Delta Air Lines and Korean Air are investing a combined $550 million in Canada's WestJet despite shaky Canada-US travels under Trump's tariffs.

The investment comes at a shaky moment for travel between Canada and the U.S., with Canadians taking fewer trips to the U.S.

Delta Air Lines and Korean Air have both acquired minority shares in Canadian carrier WestJet, with Air France-KLM also set to benefit from the investment.