Air Force (13-6, 4-2 Mountain West) trailed 13-10 mid-way through the first half but used a 20-10 run capped off by Fletcher's half-court 3-pointer at the buzzer to take a 30-23 lead at halftime. The Falcons never trailed again.
Michael Lyons added 15 points and four rebounds for Air Force, which shot an even 50 percent from the field and outscored the Bulldogs 26-12 in the paint. Mike Fitzgerald added seven points and 10 rebounds.
Fresno State was led by Kevin Olekaibe who scored 18 points, all of which came from beyond the arc as he hit six 3-pointers. Tyler Johnson and Allen Huddleston scored 11 points apiece.
Olekaibe and Huddleston were part of a Fresno State (7-13, 1-6) bench which outscored the Falcons' bench 34-12.