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 will invest $330 million for a 15% stake and Korean Air will inject $220 million for a 10% interest. The U.S. airline also plans to sell and transfer a 2.3% stake in WestJet to its joint venture partner, Air France-KLM, for $50 million.