Central defender Mason opened the scoring with a header from a corner kick by Olivia Moultrie, the 16-year-old Portland Thorns pro, in the 8th minute. Haiti managed keep the USA at bay for the rest of the first half, but five minutes into the second, Thompson opened the floodgates after a setup by Cooper, who had stolen the ball in Haiti's half. Lilly Reale (UCLA) assisted on Jackson's goal, DellaPeruta scored from the penalty spot after Thompson was fouled, and Patterson prepped Cooper's stoppage time goal.
Mexico faces Canada in the other semifinal. The third-place game winner also earns a World Cup spot.
March 8 in Santo Domingo
USA 6 Haiti 0. Goals: Mason 8, Thompson 50, Jackson 68. DellaPeruta (pen.) 78 Patterson 87, Cooper (Patterson) 90+3.
USA -- Justus; Rouse (Oke, 90+2), Mason, Reale (Flynn, 90+1), Guidry; Missimo (Colton, 90+2), Moultrie, DellaPeruta; Jackson (Patterson, 73), Cooper, Thompson (Byars, 82).
Haiti -- Fleuriot; Joseph, France, Joseph, Moryl, Flore Desmarattes (Rosinvil, 58); Dumas, Dorce, Alya Marcellus (Petit Frere, 90+5); Ornis, Pierre (Joseph, 58).