Packages start at £20 per person for a pre-departure lateral flow test and a PCR test on day two after their return, including delivery and return costs for the tests.
The government is expected to unveil its traffic light system on Friday.
Andrew Flintham, managing director of Tui UK & Ireland, said: “We have always believed that cost-effective testing solutions, as well as maximum flexibility, will make travel a possibility this summer and beyond.