Parts of the airport are open 24 hours but all the services are really only open around flight schedules
No. Hours depend on flight.schedules. Check in opens 2 hours before first departure and closes 45 minutes before scheduled departure. Baggage claim area accessible 24 hours, but Starbucks and rental car counters maybe closed.
Not that I know of, I think the last flights out of there are like 11 p.m.
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