They were due to jet home late on Thursday night after the 1-1 draw with Juventus in the Europa League.
However, the plane due to take them back was grounded at Turin airport because of a technical problem, prompting Mancini to decide they would spend the night in the Italian city.
And further complications with the plane delayed their departure on Friday morning and they are now not expected to land back in Manchester until at least midday.
Showdown: Manchester City's Carlos Tevez was due to meet Roberto Mancini on Friday
Tevez, who has requested a move away from Eastlands, was set to sit down with manager Roberto Mancini on Friday to discuss his future. That meeting is now expected to be put on hold until at least Saturday.
Mancini has already decided that the unsettled Manchester City captain will play against Everton in the Barclays Premier League on Monday night.
Tevez was absent from the second string City team that drew at Juventus to ensure that they finished top of their group in the Europa League and has not played since handing in a transfer request at the start of last week.
Stranded: Roberto Mancini spent an extra night in Italy after being grounded
However, Mancini was adamant after Thursday's match that Tevez will play on Monday and will tell the 26-year-old that his future must be settled once and for all over the coming few days.
The City manager said: 'When I arrive at the training ground, I will speak with Carlos. Will he play on Monday? Yes, why not?
'He recovered and rested today, so he will play on Monday. He has trained well since Tuesday and he doesn't have a problem.
Delight: Adam Johnson (left) and Jo celebrate their equaliser against Juventus
'On Monday, we have a very difficult game and I want all of my players to be there, 100 per cent. I haven't had this situation before, but it can happen at any club in England or Italy.
'It is important I speak to him. I want to understand what he wants to do because I think this can finish in the next two days. It's important that it can finish quickly.'
Mancini is yet to decide whether to give the captaincy to someone else for Monday's game.
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Explore more:People: Carlos Tevez, Roberto Mancini Places: Manchester, United Kingdom, Italy