Fabian Espindola had put Real Salt Lake, the defending Major League Soccer champions, up 1-0 5 minutes into the first leg of the Western Conference semifinal match.
Jeff Cunningham, subbing for injured Milton Rodriguez, tied it up for Dallas with a goal shortly before halftime.
The series moves to Utah next Saturday.
Toddler uninjured after being knocked over by Obama family dog
Florida bear attack: Black bear mauls woman's face