Cancun International Airport (CUN) : Take the only exit road from the airport, follow the sign Hotel Zone and continue driving until km 7.5 on Kukulcan Boulevard.
Depuis le nord
If you are at Isla Mujeres or Isla Contoy you can take the ferri to Cancun, it is not much expensive aproximately 6 USD and the trip takes around 40 min.
Depuis le sud
You can arrive to Cancun from Playa del Carmen Tulum XelHa or Xcaret by ADO bus ask for the bus station and there buy your ticket to Cancun the price is not more to 9 dlls it depends where is your location Or if you prefer take the road to cancun the trip takes about 1 hr
If you are at Cozumel at Cozumel you have to take a Ferri, to Playa del Carmen and then you take the bus to Cancun or take the road, the trip takes 1 hr aproximately and the cost 20 USD per person.
You can arrive to Cancun from Merida and Chichenitza by ADO bus. Get to the bus station and buy tickets there, price is around 20 USD. Or if you prefer you can take the road to Cancun, the trip takes about 4 hrs from Merida and 3 hrs from Chichenitza