Ernst had rounds of 65, 65 and 63 at the Pinnacle Country Club -20 A Ernst (US); -18 A Nordqvist (Swe); -16 A Stanford (US), N Korda (US); -15 J Shin (Kor), Sei Young Kim (Kor); -14 Inbee Park (Kor), K Kirk (Aus) Selected others: -12 J Ewart Shadoff (Eng); -11 C Thomas (Eng); -7 G Hall (Eng), G Dryburgh (Sco); -6 S Meadow (NI); -3 B Law
American Austin Ernst fired an eight-bottom final of 63 for the NW Arkansas Championship with two shots to win.
World No. 58, fifth at this month's Women & # 39; s Open, finished 20 under, taking the title after 144 starts since her last LPGA victory in 2014.
Ernst, 28, started last day at Pinnacle Country Club four behind Anna Nordqvist, but had 10 birdies.
England's Jodi Ewart Shadoff completed a third consecutive round of 67 for a share of 11th, eight strokes back.
Countryman Georgia Hall, the 2018 Women's Open Champion, finished with a bogey-free 66 and a share of 49th place at bottom seven.