The Juno Award-winning post-hardcore rockers from St. Catharines, Ont., will launch the reunion trek at London's 02 Academy on Dec. 3, according to a graphic posted to the group's official website.
From there, the group will play two shows in Australia before hitting Canada for gigs in Edmonton, Calgary and Montreal.
The tour will wrap with a pair of dates at Toronto's Sound Academy on Dec. 26 and 27.
The quintet announced their split last August in a blog post, in which singer George Pettit said the breakup was necessary but "not really" amicable.
He added that fellow singer Dallas Green had informed the rest of the group that he wanted to focus on his Juno-winning City and Colour solo project, and the band decided to dissolve soon afterward.
A rep for Alexisonfire confirmed recently that the band's full lineup was expected to take part in the reunion.
