Beginning in two weeks, passports will be required to enter the U.S. by air from Canada, a change with huge potential for economic disruption.

New passports are more than a formality since new ones cost $97 and renewals $67. One possible casualty: Kenmore Air, which flies between Seattle and B.C., said it’s budgeting a reduction in summertime travel to Canada because passengers without passports may go by land or boat instead of paying the extra expense.