This question already has an answer here:

Planning a trip to South Africa but leaving on day 90. I know that I don't need a visa when traveling 90 days or less, but what would happen if my flight is delayed or cancelled on that 90th day?

marked as duplicate by Traveller, David Richerby, choster, Michael Hampton, Ali Awan Mar 29 at 7:43

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 5
    Bad things. It's best to leave a bit of a buffer by leaving on the 89th day, or even the 88th. – phoog Mar 28 at 17:17
  • 1
    You end up like this guy with an "undesirable" status: travel.stackexchange.com/questions/134658/…. It's almost never a good idea to push your visit to the absolute maximum number of days allowed. – Greg Hewgill Mar 28 at 19:20