Which is better for Sao Paulo to Rio trips, Car or Plane?

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This weekend I had a bad experience. My family traveled to Rio and we went by Plane. My dad and I wanted to travel by car but my mom hates it, so what could we do, women always win...(unfortunately) Anyways, the expected was that the trip would be faster and less frustrating since plane trips are much faster. The estimated time from Rio to São Paulo, vice versa, by plane varies from 30-45 min, while car trips usualy take 4- 5 hours. However, it turns out we were wrong on our theory. Car trips are less frustrating and faster than plane trips form Rio to São Paulo. First of all, when travelling by car the family decides the time to leave and feels free to change it if needed. In the other hand plane trips have specific times and if you get late you lose the flight wiht no refunds. Secondly, one must arrive onne hour before the flight in the airport to guarantee he/she is on time. There are several things one must do before actaully getting inside the plane( Check in, bag departure,etc), so getting a hour before is quite necessary. Even though every precaution may be taken, it is impossible to avoid airline companies' mistakes. Flights are delayed and departure gates keep changing which can stress even the most devote followers of Ghandi's. To make a long story short, the plane trip back to São Paulo took 5 hours. Now if we knew that we obviously would've come and gone by car and saved a lot of money.