From Tuxtla Gutiérrez city, you can compare ADO buses with locally operated shared vans (colectivos) to San Cristóbal de las Casas. One mapped option is Coletos Transporte a San Cristóbal on 9a Sur Oriente. Prices, frequency and arrival points for this operator have not yet been independently confirmed. Tuxtla Airport (TGZ) is a separate origin.
Quick answer
For a possible budget option, check Coletos Transporte a San Cristóbal, listed at 9a Sur Oriente 1350, Maldonado 2, Tuxtla Gutiérrez. The Google Maps listing shared with SanCrisGo shows 967 115 9802 as its phone number; call or verify at the stand before traveling. This is not ADO's station. The operator's current fare, operating hours and precise arrival location are not independently verified.
ADO lists its Tuxtla city terminal at Av. 5 Norte Poniente and Boulevard Antonio Pariente Algarín 551. Use its date-specific route search for a ticketed alternative.
Local colectivos and a possible Chiapa de Corzo connection
Shared minibuses are another intercity transport option. They use several stands and may operate independently of ADO. Coletos has a mapped stand in Tuxtla at 9a Sur Oriente 1350. A Tuxtla tourism map also identifies San Cristóbal-bound transport at 15a Oriente and 4a Sur, and older receipts document another operator, Grupo San Cristóbal, near Mercado de los Ancianos. These are separate documented locations, not interchangeable boarding instructions. Historical fares and frequencies from those receipts are not current terms for Coletos.
If your trip includes Chiapa de Corzo or Sumidero Canyon, there is also a place listed as in . Its name suggests departures to San Cristóbal, but service, fares, timetable and the exact drop-off point still require direct confirmation.