The bosses of more than 70 travel firms and hotels have written to Home Secretary Priti Patel urging her to scrap the quarantine plans.
In a letter, the companies say the last thing the travel industry needs is a mandatory quarantine.
The quarantine will not only deter foreign visitors from coming to the UK but will make it difficult for UK travellers to take their overseas holidays.
The letter also said the plans will also likely cause other countries to impose reciprocal quarantine requirements on British visitors.
The letter reads: “Many people urged the government to impose quarantine regulations during the early phases of Covid-19.
“Instead, no action was taken and flights from many infected countries were allowed to land, making it easy for thousands of potentially affected passengers to spread the virus into the wider UK community.”
A Home Office spokesperson said: “As the world begins to emerge from what we hope is the worst of the coronavirus pandemic, we must look to the future and protect the British public by reducing the risk of cases crossing our border.
“We continue to support businesses in the tourism sector through one of the most generous economic packages provided anywhere in the world. However, it is right that we introduce these new measures now to keep the transmission rate down and prevent a devastating second wave.”