katerina wrote:does anybody know if it's possible to take a chicken bus from Xela to Tapachula? If so, do you know ... where the bus leaves from Xela?
I don't know of any direct bus. Buses for Reu or Coatepeque leave from Minerva terminal. If you arrive late in Reu, there are inexpensive hotels within half a block from where you got off the bus. In Retalhuleu or Coatepeque there will be chicken buses to Mexican border waiting for you already, or you can wait for a first class bus. At the border, there are passenger tricycles to take you across a long bridge crossing the Suchiate river. If you see rafts instead, you are just a few blocks away. Ask your money changer to point you in the right direction. Keep Q15 to pay the fee for your exit stamp. The price is higher in foreign money. I think the tricycle drivers will accept any currency. On Mexican side, they have a nice air-conditioned ticket office with restrooms rather than paying the fare on the bus to Tapachula.
There is another, more scenic, route via San Marcos instead of the above coastal route. It has been a long time since I went that way. I seem to remember it making a lot of stops for passengers including uniformed high school kids going home from school.