Let's say you had a 2 hour flight that gets you to your client's site. Let's also say that there is a weekly 3pm meeting on Monday that you need to attend. It is extremely important that you make this meeting and if you miss even one, you could lose the client.

Would you risk taking the flight in the AM day of, or would you fly out on Sunday night? Let's also assume that the place you're flying out of is BOS and prone to weather issues at various times of the year.