The Warriors, chasing a fourth title in eight campaigns, won the best-of-seven Western Conference finals 4-1 and secured a place in June's title showdown, AFP reported.
Golden State won NBA crowns in 2015, 2017 and 2018 by defeating the LeBron James-led Cleveland Cavaliers each time but lost the finals in 2016 to the Cavs and in 2019 to Toronto.
Andrew Wiggins scored 18 points and grabbed 10 rebounds for the Warriors while Draymond Green added 17 points and nine assists, Jordan Poole scored 16 points off the bench, Stephen Curry – the Western Conference finals MVP – added 15 and nine assists, and Kevon Looney added 10 points and 18 rebounds.
It will be the sixth consecutive trip to the NBA Finals for Thompson, who missed the entire 2019-20 campaign after left knee surgery and the entire 2020-21 season with a torn Achilles tendon.
Thompson made 12-of-25 shots from the floor, including 8-of-16 from 3-point range.
The Mavericks haven't reached the NBA Finals since winning the crown in 2011.
Slovenian star guard Luka Doncic had 28 points, nine rebounds and six assists to lead the Mavericks while Spencer Dinwiddie added 26 points off the Dallas bench.