The UNWTO said while efforts to restart tourism had so far had been "slow but continuous", it was vital the world reopened in a responsible manner.
Its latest data shows that by 19 July, 40% of destinations had eased restrictions, up from 22% as of 15 June and 3% as of 15 May.
"It confirms the trend of a slow but continuous adaptation and responsible restart of international tourism," said the UNWTO.
However, only four of the 87 destinations that have eased their Covid measures have lifted restrictions altogether.
The UNWTO’s latest data also shows 115 destinations worldwide – more than half – still have their borders shut to tourists.
