Findings may have implications for the prevention of dementia. 1  For years, many experts have maintained that the subtle changes in memory and mental function that occur naturally as we get older rarely begin before age 60.
The time someone needs for a connection varies from one airport to the other and from one flight to another. Usually with a domestic flight it can go from half an hour to one hour, and for international flights it can go from one hour to three hours. Most of the times that you are making a connection the gates are next to each other or in close proximity to avoid any missed flights. As in anything there are exceptions to the norm.
The airlines have a cut-off time of 30 minutes prior to flight time in order to check in (we almost missd it once). To be safe, for domestic flights, we arrive at the airport between 1 hour to 1.5 hours prior flight time, which gives enough time to check in, and get through security lines. For an international flight, I would arrive 2 hours before flight time.