The Co-operative Travel has bought four Andes Travel agencies for an undisclosed sum.
The deal will see the four shops in Hitchin, Stevenage, Harpenden and Welwyn Garden City become The Co-operative Travel shops this week.
The Hitchin branch is also being moved to a larger site, where it now also houses a foreign exchange desk.
The area’s regional manager Jenny Hollis said: “We have been looking to open branches in Hertfordshire for some time, so when the opportunity came to take on Andes Travel, we took it immediately.
“All of the staff are being retained, so it’s the same familiar faces allied with the knowledge and trust that come with The Co-operative brand.”