Taxis, shuttle, and transfer pick up area at the Cancun airport.
Meeting point at Cancun airport for hotel pick up. (Most hotels will do airport pick up for a fee but it will be more expensive than booking through Cancun Airport Transportation.)
Private transfer van from Cancun to Tulum.
The vans are large with lots of seating and room for luggage.
If you book a private transfer with the Cancun Airport Transportation company (link below) they’ll have signs and meet you just out the main Arrivals door by the Grab And Go snack shop. You can’t miss it.