Hundreds of industry workers, including travel agents, pilots and cabin crew from airlines such as British Airways and easyJet, gathered outside the parliament in London. There were other protests in Edinburgh and in Belfast.
According to industry body ABTA, an estimated 195,000 jobs have been lost across the sector and many more remain at risk. The government is set to update its traffic-light system in coming days, but few changes are expected. There is speculation that Malta and Spain's ever-popular Balearic Islands, which include Majorca and Ibiza, may be added to the list.
A debate is taking place within government as to whether people who have been fully vaccinated against the virus should be eligible for quarantine-free travel if they return from one of the countries on the amber list.