How long does sangria last?

Assuming that you're speaking about a sangria that has been made with fresh fruit, and not a shelf-stable product, it will last for about 3-4 days in the fridge. After that, the fruit will begin to break down and the sangria will become less tasty.  wikipedia reference You can freeze the fruit before including it to the wine if you're looking to extend the life of your sangria. This will assist to keep the fruit fresh and the sangria tasty for a longer duration of time.