The Bombers meet the East Division’s Hamilton Tiger-Cats in next Sunday’s championship game in Calgary. The Ticats downed the Edmonton Eskimos 36-16 in Sunday’s East final.
Kenny Lawler caught a touchdown pass and Justin Medlock kicked four field goals for Winnipeg.
Roughriders kicker Brett Lauther had four field goals in the loss.
Saskatchewan topped the West division with a 13-5 record, ahead of the Calgary Stampeders (12-6) and the Bombers (11-7).
Winnipeg last played in a Grey Cup in 2011 when the Bombers fell 34-23 to the host B.C. Lions. The Blue Bombers haven’t won the CFL’s championship trophy since 1990.
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