"What it costs us is about $680 per alien on a foreign removal flight," said Pitts. "So that's about a third of the cost it would be to get them a commercial ticket."
Some of the flights are exclusively for people convicted of crimes. On one flight to Mexico, all the passengers wore handcuffs and leg irons.
Guadelupe Cabarena, who was sentenced to five years for aggravated assault and turned over to ICE after her release, said she expected to come back to the United States.
"As a matter of fact, I was thinking just to rent a hotel room for tonight in Laredo or whatever, and then just to rest. ... I'm tired ... and then just come back," she said.
Raul Cornelia Pena, who served six years for solicitation to commit burglary, was being returned to Mexico for the second time.
"I didn't have no choice, because I wasn't going to leave my family behind and just say forget it," he said. "They sending me with no money, no nothing, I don't know anybody. I don't know what I'm going to do."
Pitts acknowledged that some of those deported return.
"There are going to be some aliens that do return back across the borders, but we're going to be there for them, if we don't take them out at the point of entry or between the point of entry, then we will get them in the interior of the United States," he said.
He said it's "a given" that some repeat offenders will return, "but by securing our borders and beefing up immigration enforcement we know that they'll be cut once again and returned."
Pitts said that those who have entered illegally must be returned home. "We need to respect the sovereignty of our nation as a whole. If you want to come in the country; you need to come in the country legally."
After the flight to El Salvador landed in the capital city, passengers were served a traditional El Salvadoran meal and offered free employment training.
After a brief interview and a criminal background check, they were allowed to leave.
"I feel kind of weird, you know, everything is going to be new for me," Garcia said.
Returning home, he had to stop to ask for directions several times and was overwhelmed to see his father and the rest of his family. The home he returned to was basic, with water coming from a well and animals everywhere.
"I'm happy, but I'm sad at the same time," Garcia said. "Everything is going to start all over again over here and ... I don't know how is going to be my life here. But I am going to try my best to success, you know."