In France, "Encore un soir" debuted at number one on the singles chart after only three days of sales, with 7,809 copies sold.[15] It replaced Justin Timberlake's "Can't Stop the Feeling!" at the top and posted the highest weekly single sales of 2016.[15] The song also became Dion's sixth number-one single in France.[16] With this achievement, she extended her record for the most weeks at number one on the French Singles Chart, reaching 38 weeks in total. "Encore un soir" remained at the summit for a second week, selling 5,166 digital copies.[17] The last time Dion spent at least two weeks at number one in France was 15 years earlier with "Sous le vent".[17]
In the following weeks, "Encore un soir" remained within the top 10. After spending two weeks at number one, it dropped to number four with 3,081 copies sold,[18] and then to number seven with 2,377 units.[19] It later rebounded to number four, selling 3,141 copies.[20] Following Dion's concerts in Paris during the Summer Tour 2016, the single climbed to number two with more than 3,200 units sold.[21][22] The following week, it slipped to number three with 2,998 copies sold.[23] In its eighth week, the single held at number three with 3,601 copies sold.[24] It rose to number two the following week, selling 2,370 units.[25] Over the next three weeks, it charted at number nine (2,133 units),[26] number eight (2,100),[27] and number seven (2,000).[28] After 12 weeks, cumulative sales in France exceeded 40,000 copies.[28] In its 13th week, the single fell to number 10 with 1,513 units sold,[29] before climbing back to number three the following week with more than 1,700 copies sold.[30][31]
In week 15, it returned to number one with 4,421 units sold.[32] That same week, the album Encore un soir debuted at number one.[32] Both the single and the album remained at the top the following week.[33] The single sold 3,969 copies that week, marking its fourth week at number one and surpassing the three‑week run of "Sous le vent".[33] In its 17th week, the song dropped to number two with 2,786 units sold, bringing its cumulative total to 54,472 copies.[34] On 29 July 2016, the single was certified gold by the SNEP.[35] In week 18, it fell to number seven with 1,918 copies sold,[36] then rose to number six the following week with 1,464 units sold.[37] In week 20, it climbed to number four with 1,946 copies sold,[38] before falling to number five a week later with 1,871 units sold (61,674 total).[39] After 21 weeks inside the top 10, the single dropped to number 12, selling an additional 1,300 copies.[40][41] Among Dion's singles, only "Pour que tu m'aimes encore" spent more weeks inside the French top 10, with 31.[40] On 21 October 2016, the single was certified platinum in France for 20 million cumulative sales (downloads and streaming).[42][43] On 29 December 2017, it was certified diamond in France.[35]
After three days of sales, the song debuted at number 10 in Belgium's Wallonia,[44] and at number seven on the Belgian Digital Songs chart.[45] It also entered the Swiss chart at number 25,[46] reaching number one in Romandy[47] and number six on the Swiss Digital Songs chart.[48] The single debuted at number four in Luxembourg,[49] and at number 31 in Hungary.[50] On the Euro Digital Songs chart, it entered at number 18.[51] In Canada, also after three days of sales, the song debuted at number 15 on the Hot Digital Songs chart.[52] It also entered the Canadian Adult Contemporary chart at number 39,[53] and the Canadian Hot 100 at number 92.[54] In Quebec, Dion debuted at number one on the Digital Singles Chart,[55] where "Encore un soir" remained for 16 consecutive weeks.[55] The song also topped the Quebec Adult Pop Songs chart for three weeks.[56] "Encore un soir" was certified gold in both Switzerland and Canada.