The Europa League winners were due to face Paul Lambert's Villa on Saturday 31 August, but now the match will be played 10 days earlier.
This means Jose Mourinho's side will have to play two home games in the space of four days - their season opener against Hull on 18 August and Villa - before travelling to Old Trafford to face Premier League champions Manchester United on 26 August in a game that is live on Sky Sports 1.
The Blues face Champions League winners Bayern Munich in the Super Cup final on Friday 30 August.
The match pits former Real Madrid boss Mourinho against ex-Barcelona coach Pep Guardiola, who succeeded Jupp Heynckes at Bayern after having taken a year out of the game.
Guardiola was linked to the Chelsea job before Mourinho returned to Stamford Bridge for his second spell in charge of the club.