Beginning Tuesday, Canadians won't be able to fly south of the border without a valid passport under a new U.S. rule that has travellers flocking to passport offices in record numbers.

"I'm a little teed off," said Claudette Bergeron, who was waiting at a Toronto passport office to renew her passport that she noticed had expired after purchasing an airline ticket.

Other customers were more frustrated after driving an hour-and-a-half to the nearest passport office and getting turned away.

"Something should be done about that," said Chris Serr. "People get jerked around for nothing." Before Jan. 23, Canadians could enter the U.S. by all modes of travel with proof of citizenship and identity, such as a birth certificate and a government-issued photo identification. After Jan. 23, only requirements for travel by air to the U.S. will change. Canadians can continue to use birth certificates and drivers' licences to cross the Canada-U.S. border by land and sea — for at least another year.