So you claim we are running buses from the US to Honduras, Guatemala, and El Salvador? That must be making Greyhound very happy.
The US has many different programs and methods of deportation. Some are direct and some are indirect. One recent method the US has used is to charter a flight from the US and put deportees from Nicaragua, Honduras, and El Salvador on board and fly them all to Guatemala and dump them all there. It's up to the deportees to figure out what to do after arriving there.
Another new program with the humane sounding and ironic title of "Migration Protection Protocols (MPP)" takes migrant asylum seekers awaiting asylum hearings, which may not happen for months, and forces them back across the border to wait for their hearing. Its a policy that was introduced following unpleasant pictures and press of migrant families seeking asylum being held in cages in US detention centers.
Instead under MPP, they're bussed to the US-Mexico border and handed over to Mexican authorities. There they discover they have the choice of waiting in a border town where they are often prey to gangs who rob, kidnap, brutalize, and do even worse things to the migrants; or they can get on a bus to be transported 1300 miles to the southern most tip of Mexico, on the border of Guatemala, where they are often prey to gangs who rob, kidnap, brutalize, and do even worse things to the migrants; or from there, they can make their way back to their home countries which they fled because they were prey to gangs who rob, kidnap, brutalize, and do even worse things to them. All of the options help to deter their return for their asylum hearing in the US by placing them in dangerous and untenable positions, as far way as possible, and helps to keep them from immigration attorneys that might assist them in the US.
No, it isn't a Greyhound driving them all the way from the US to Guatemala. It's a US-Mexico cooperative agreement invented by the Trump administration. To those on the buses, I don't imagine it makes much difference if the trip is on one bus or two.
But since I've found words are not the best way to communicate with you, here are some pictures that might assist. They're from Voice of America (VOA) the Trump administration's international news agency.
Map of bus route from US border to Guatemalan border...
https://www.voanews.com/usa/immigration/US to Guatemala bus route for deported migrantsWaiting to board at US-Mexico border town bus station...
https://www.voanews.com/usa/immigration/migrants-assess-options-mexico-buses-them-us-borderNice out....not.
My previous exhausting experience showed me that you have an extraordinary ability to insist that words and language mean whatever you want them to mean thru the use of logic twisted like a pretzel. I never did care for pretzels much and I have no intention of getting on your merry-go-round of reasoning again. So, congratulate yourself now. I'm done with this topic.