Garrett Phillip Hillmer, who is 53, didn't show up for his first court appearance on Tuesday.
Hillmer is charged with uttering threats against Mayor Don Atchison on Sept. 20 during a call to Saskatoon's transit customer service line.
It was the first day that transit workers were locked out by the city in a contract dispute.
Workers returned to work last week after the Saskatchewan Labour Relations Board ruled the city had no legal authority to impose the lockout.
(CKOM, The Canadian Press)