The Prime Minister's official spokesman was asked during a Westminster briefing about Transport Secretary Grant Shapps' comments that he has no plans to book a summer holiday yet because of the pandemic.
The spokesman said: "While we are making progress in our fight against coronavirus, we are not able to say with certainty the point at which the social distancing measures can be relaxed and in terms of travelling within the United Kingdom for holidays, that is not something which the current social distancing guidelines allow for.
"And secondly, in terms of travel abroad, the advice of the Foreign Office continues to be that you should go abroad for essential travel only.
"As of today, it is a fact that both the guidelines and the official Foreign Office advice do not allow for people going on holidays."
Jet2 has currently cancelled all flights until at least June 17.
TUI has cancelled all holidays before May 14, Marella Cruises set to sale before May 31 and TUI River Cruises until November 25.
Easy Jet has cancelled flights until at least June.
Ryanair is currently flying less than 20 daily flights.
The airline said: “Due to widespread EU government flight bans and restrictions, Ryanair expects to carry minimal if any traffic during the months of April and May.
“Ryanair Group Airlines continue to work with EU governments to maintain minimum flight links for emergency reasons and to operate rescue and medical flights when requested to do so.”