Tui says it has "no plans" to reopen to customers on 15 June, despite getting the go-ahead from government at the weekend.
A spokesperson for the operator told TTG on Wednesday (27 May) the business was still reviewing how to reopen its retail network safely.
From Monday (1 June), Tui will increase the size of its retail team working to assist customers amid the coronavirus crisis to 1,100.
Most staff are working from home, but Tui said it was "looking at all options". It has not ruled out closed store working.
The update comes after Tui UK and Ireland boss Andrew Flintham admitted the operator "hadn’t got it right" on refunds.
Flintham, Tui managing director UK and Ireland, said the firm had launched a self-service refund tool, and introduced more flexibility on amendments.
He also revealed the operator’s call centre team had been dealing with up to a million calls a day, 10 times what it received on a typical day pre-Covid-19.
Prime minister Boris Johnson confirmed at the weekend non-essential retail businesses, including travel agencies, would be allowed to reopen from 15 June, subject to meeting new Covid-secure guidelines for workplaces.
"We’re still reviewing the number of stores that would safely allow for a safe return to work for our advisors as the health and safety of our colleagues has to be our highest priority," said the Tui spokesperson.
"We have no plans to open stores on 15 June for customers. The primary role of our retail advisors is to help and support our customers and this has worked well with our homeworking team.