The CAA has said around 20% of Atol holders have yet to apply to renew their licences before the September 30 deadline.
The authority urged companies to apply for renewal as soon as possible and added that those yet to meet their licence conditions must do so or “face losing their ability to sell package holidays” after that date.
In a statement, it said: “With just one week left before the deadline, there is still a variety of different sized travel companies that are yet to apply to renew their Atol: around 20% of businesses.”
Michael Budge, head of Atol licensing, added: “We appreciate the challenges the travel industry has faced over the past 18 months and thank those travel businesses that have already submitted their application and supporting information for renewal in good time.”
He added: “We are continuing to work closely with many businesses to support them with their licence renewal. However, applications must be thoroughly assessed and where licence conditions are required these must be met before the new licence can be granted.
“Therefore, it is very important that those businesses that have not yet submitted their applications do so as soon as possible to avoid delays to their ability to sell package holidays.”