Daydream, your mother and my mother had the same opinions about when to arrive! I've traveled with people who insisted they didn't have to keep my schedule. I went ahead to the airport and they missed the flight! One of my friends said 'It is so early to make her happy. Just get her to the airport early.'

I've recently waited over an hour in the security lines at LAX when changing from an international arrival to a domestic flight. I had 2.5 hours between flights.