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 Lines will acquire an aggregate 25% stake in Canada's WestJet Airlines for $550 million from private equity firm Onex Corp , the U.S. carrier said on Friday.