In 2017, Boutier captured two wins on the
Symetra Tour (
Self Regional Healthcare Foundation Classic and
Sioux Falls GreatLIFE Challenge) as well as eight top-10 finishes. She became the third member of the 2017 graduating class to exceed $100,000 in a single-season earnings and was the first player from France to earn her
LPGA Tour card through the Symetra Tour since 2013. After the Symetra Tour season concluded, Boutier played several events on the
Ladies European Tour, winning the
Sanya Ladies Open. In
2018, she played in 25 events on the LPGA Tour and made 16 cuts, earning $319,577 and finishing 61st on the money list. She shot a 63 in the third round of the
Thornberry Creek LPGA Classic, a career low round. In February
2019, Boutier enjoyed her first LPGA Tour win at the
ISPS Handa Vic Open. In the final round, Boutier made a critical birdie on the 15th hole and showed "nerves of steel" to claim a two-shot lead and victory in the $1.5 million tournament. In doing so, she ended a long drought for French players on the LPGA Tour, becoming the first female pro from France to win since
Patricia Meunier-Lebouc in 2003. With the LPGA Tour on hold because of
coronavirus, Boutier won the
Texas Women's Open on 4 June
2020, edging out Texas native
Cheyenne Knight. She jumped 11 places from 15th to 4th on the
Women's World Golf Rankings. The following week she won the
Women's Scottish Open by two strokes over
Kim Hyo-joo, with three rounds in the 60s, and a final 70, for a 273 (-15) score. It was her 13th win, and fifth on both the LPGA and LET tours. She moved up 1 place from 4th to 3rd on the
Women's World Golf Rankings, her highest ever. ==Personal life==