CSK will play Mumbai Indians in the final of the ongoing IPL in Hyderabad on Sunday. While CSK won the final battle in 2010, MI finished on the victorious side in 2013 and 2015.
Chasing the modest total, Faf du Plessis (50 off 39 balls; 7x4s, 1x60 and Shane Watson (50 off 32; 3x4s, 4x6s) got CSK off to a flier, stitching 81 runs in 10.2 overs.
The duo started cautiously before opening up to not allow any DC bowler to settle down.
Just after notching up his 12th IPL fifty, Du Plessis departed while going for a big shot over deep square-leg off Trent Boult (1/20), only to be holed out by Keemo Paul.
After Du Plessis' dismissal, Watson took the centrestage and struck Paul for one four and three sixes to pile up 25 runs off the 12th over and also registered his half-century off 31 balls in the process.
Watson looked in a hurry to finish off the chase and that eventually led to his downfall, caught by Boult off Amit Mishra (1/21) in the second ball of the next over.
Suresh Raina (11) and skipper Mahendra Singh Dhoni (9) got out cheaply but Ambati Rayudu (2 not out) remained at the crease to ensure a comfortable win for the three-time champions.
Earlier sent into bat, Bravo (2/19), Jadeja (2/23), Deepak Chahar (2/28) and Harbhajan Singh (2/31) shared eight wickets between them to restrict Delhi Capitals to 147 for nine.