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.

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.

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