Brits could be banned from visiting the US for another three months at least, airlines have warned.
Travel between the UK and the US has been frozen since March 2020, thanks to a series of presidential proclamations.
The US is on the UK’s amber list of countries, requiring a 10-day quarantine when returning to the UK and two post-arrival PCR tests unless you have had two Covid jabs.
At the G7 in June a trans-Atlantic taskforce was launched in a bid to find a way to ease restrictions between the two countries.
Warning signs from major airlines have now suggested that this has not yet borne any fruit.

This week one carrier is expected to push back scheduled services from London to New York from September to November, the Telegraph reports.
Virgin Atlantic has pushed back the restart date for its Heathrow-Las Vegas flights to mid-September.
While there has not been an official announcement, the airlines clearly think the ban is unlikely to be lifted anytime soon.
It had been hoped that Joe Biden, the US president, could introduce exemptions for double-jabbed Brits.
Under current rules only Americans, their relatives in specific circumstances and some very tightly defined exempt groups are allowed into the US.
The lack of action may be in part due to the worsening coronavirus situations in both the US and UK.

Ahead of schools going back in early September - which is likely to bring about a rise in infections - case numbers have been increasing in the UK.
In the past week 230,867 cases have been reported, a 13% rise compared to the previous seven days.
The US recorded 266,147 infections on August 23, its highest total since February.
"The figures are going in the wrong direction for the US," said Henry Smith, chairman of the all-party Future of Aviation group.
"I don't see any appetite in the US to open up sooner rather than later.
"It is slightly different for the US because they have such a big domestic market, which means international travel makes up a smaller proportion of the industry's revenues."