u/BirthdayAlert5020

This Reddit recommends Airport Shuttles with affiliate links. The first option presented is 205 USD one way from either Cancun Airport or Tulum Airport, for any amount of passengers.

Do better: these extortionate rates are main part of the downfall of Tulum so often discussed here. There are infinite more useful recommendations you could give the top spot that make you less money but are actually beneficial for anyone visiting Tulum.