Arike Ogunbowale scored 20 points, Teaira McCowan had 12 points and 16 rebounds, and Dallas advanced to the semifinals.
The Wings won a playoff series for the first time since relocating to Dallas for the 2016 season. Dallas will play top-seeded Las Vegas on Sunday.
Dallas became the first team in WNBA history to have seven double-digit scorers in a playoff game. Satou Sabally and Awak Kuier each scored 13 points, Kalani Brown added 12, Crystal Dangerfield had 11 and Natasha Howard 10.
Dallas pulled away in the second quarter by outscoring the Dream 29-10 for a 52-34 lead. Natasha Howard made a wide-open 3-pointer to cap Dallas’ 13-1 run for a 48-31 lead. Ogunbowale and Sabally combined for 24 points in the first half, and the Wings shot 50% from the field.
Dallas beat Atlanta for the fifth straight time this season, including the two-game sweep in the playoffs.