24 hours
I can confirm it runs 24/7. I've never waited more than 5 minutes for a shuttle at the airport.
It goes 24/7 the one we took was going in every 15-20 minutes It goes right from the rental place to the airport with some extra stop picking up other people from hotels like Marriott Hilton etc. If by any chance the car rental stop is not having the shuttle bus 24/7 you can just walk 5 my nutes to the Marriott hotel at the corner where the shuttle definitely goes around the clock Good luck
I know at least 9:30 pm
The car rental runs 24/7, so is the airport shuttle service.
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