Kansas City Chiefs safety L'Jarius Sneed (38) and safety Juan Thornhill (22) break up pass intended for Buffalo Bills wide receiver Stefon Diggs (14) during the second half of the AFC championship NFL football game, Sunday, Jan. 24, 2021, in Kansas City, Mo. (Photo: AP)

Patrick Mahomes threw for three touchdowns as the reigning NFL champion Kansas City Chiefs overpowered the Buffalo Bills 38-24 to book a second straight Super Bowl appearance on Sunday.

Mahomes set up a showdown against Tom Brady and the Tampa Bay Buccaneers next month as the Chiefs' superior offensive power proved decisive in the AFC Championship decider at Arrowhead Stadium.

Chiefs quarterback Mahomes finished with 325 passing yards with 29 completions from 38 attempts with no interceptions.