Angel McCoughtry's 3-pointer with 1.5 seconds left in the game ended the Lynx's nine-game winning streak against the Atlanta Dream.
Minnesota was leading 74-73 when McCoughtry took the corner three and buried it for the finishing touches on Atlanta's 13-4 run to close the game.
Maya Moore had a chance to win it but her three at the buzzer clanked off the back of the rim.
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The loss snaps Minnesota's nine-game winning streak against Atlanta.
Moore scored 18 points and Sylvia Fowles finished with 13 points and 13 rebounds.
The Lynx return home Friday to play the Phoenix Mercury. The game will be televised on ESPN2.