Carol, we have come back through Atlanta the past few times from the Caribbean, and WITH Global Entry, 90 minutes is more than enough time. Without it, I would not chance it, coming to Boston, without a later flight. but if there are 2 later flights, I would go for it, if you really want to get home. We always plan 2 hours, and have dinner, and have time to kill after. 90 minutes would be no problem without dinner. Again, we do have Global Entry.