I'd contact the airline you booked with and see if you can reschedule for the next flight. I only had to go inside the airport to see a friend before she went home. Normally I just ride passed the airport.
Call your agent or the airline ASAP whomever you booked your flight through. It's always good to call before the flight takes off as you may save on the penalty
If you missed your flight, immediately contact the airline that you purchased the ticket from. You may have to use a airline if the airline does not have on seats available. The airline may give you a courtesy ticket, ask before you purchase a new ticket.
Call your airline and rebook another flight
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