"All the Way... A Decade of Song" debuted at number three on the US "Billboard" 200 with sales of 303,000 copies, the second-largest opener in Dion's career at that time, exceeded only by the 334,000 units that 1997's "Let's Talk About Love" spun in its first week. Thanks to Dion's CBS television special, she earned a second-week gain of 30% (394,000 copies) and the third number-one album of her career. The next week, "All the Way... A Decade of Song" stayed at number one, selling another 328,000 units. In the following week, it fell to number two with sales of 415,000 copies. In the fifth week, it topped the chart again, selling 537,000 units, becoming the first number one album of the 2000s. "All the Way... A Decade of Song" draw the biggest weekly sales in its sixth week when it sold 640,000 copies, falling to number two. On the "Billboard"'s list of best-selling records of 1999 in the US, "All the Way... A Decade of Song" was placed at number thirteen with sales of 2,900,000 units. As of November 2019, "All the Way... A Decade of Song" has sold 8,200,000 copies in the United States according to Nielsen SoundScan, with an additional 1,100,000 units sold at BMG Music Club. SoundScan does not count albums sold through clubs like the BMG Music Service, which were significantly popular in the 1990s. Despite selling over 9.3 million copies in the US, it was certified only seven-times Platinum by the RIAA. "All the Way... A Decade of Song" is also the fourth best-selling greatest hits album in the US in the Nielsen SoundScan era and the best-selling greatest hits album by a female artist. According to "Billboard", it became the 26th best-selling album of the decade (2000–09) in the US.