Brett Rypien threw for 300 yards and three touchdowns as Boise State won its seventh straight game with a 44-19 win over Air Force on Saturday night.
Boise State (9-2, 7-0 Mountain West), which snapped a three-game losing streak to the Falcons, won the Mountain division for the first time since 2014 and will play Fresno State for the conference title on Dec. 2.
Air Force (4-7, 3-4) lost its third straight and watched its bowl hopes dashed in the process.
After scoring two touchdowns in the final three minutes to complete a 25-point comeback last week against Colorado State in overtime, the Broncos scored the game's first 17 points and removed any potential drama, leading from start to finish.
Entering the game with the nation's top-ranked pass defense, Air Force struggled to stop Rypien. He passed for at least 300 yards for the second straight week and is the first quarterback to accomplish the feat against the Falcons this season.
After Haden Hoggarth's 22-yard field goal gave Boise State a 3-0 lead, Rypien started the aerial onslaught with on an 87-yard scoring strike to A.J. Richardson. It was Boise State's longest touchdown pass since 2003.
Rypien added touchdown passes of 8 and 7 yards to Sean Modster and Octavius Evans, respectively, as the Broncos salted away the victory.
Boise State's defense limited the Falcons to 181 yards rushing and forced three fumbles. It was only the third time this season Air Force -- which came in averaging 310.1 yards rushing per game, tops in the conference -- was held to fewer than 200 yards rushing.
With the loss, Air Force guaranteed its first losing season since 2013 and only the third in Troy Calhoun's 11-year tenure at the service academy.
Boise State, which slipped into the college football playoff rankings at No. 25 this week, has yet to earn a ranking in the AP poll this season, but might make its first appearance of the season in the upcoming rankings.
If the Broncos manage to find themselves in the poll, it would be the sixteenth straight season they've been ranked at least one week, the eighth longest current streak in college football.
Air Force closes out its season at home against Utah State
Boise State travels to Fresno State for its regular season finale.