Canadian officials said the six-lane Gordie Howe International Bridge will open to vehicle traffic at noon on July 27, with pedestrians and cyclists following on Aug. 5.
Thousands gathered in Windsor for a ribbon-cutting, but no U.S. officials attended as Ottawa said it wanted to keep the focus on the opening amid strained bilateral ties.
Trump said Canada had disinvited the United States, argued the original bridge agreement no longer stands, and claimed his administration renegotiated terms giving the U.S. 50% of profits.
The $4.5 billion crossing links Windsor and Detroit, is expected to ease pressure on the nearby Ambassador Bridge, and adds the first new Ontario-Michigan crossing in more than 60 years.