[1] Two further victories the following year helped him finish third in the Order of Merit and earn promotion to the Challenge Tour.

On the 2016 European Tour, he finished runner-up at the Tshwane Open in South Africa to climb into the top 250 on the Official World Golf Ranking,[3] but only kept his card through Qualifying School in 2016, 2017 and 2018.

[2] In 2019, Winther finished fourth at the Mutuactivos Open de España[2] and 91st in the 2019 Race to Dubai to keep his card.

[4] At the 2020 Commercial Bank Qatar Masters, he was clear at the top midway through the last round and was on track for his first European Tour victory, when he bogeyed the 12th, 16th and 17th holes to drop into a tie for third, one stroke shy of joining the playoff between Jorge Campillo and David Drysdale.

[4] In October 2021, Winther won his first European Tour event at the Mallorca Golf Open.