Hong Kong's Commerce Secretary Edward Yau and Singapore's Transport Minister Ong Ye Kung said travellers under the scheme would need to get negative COVID-19 test results and travel on dedicated flights.
"It is a safe, careful but significant step forward to revive air travel, and provide a model for future collaboration with other parts of the world," Singapore's Ong said.
For Hong Kong, which has banned non-residents since March, the deal with Singapore is its first resumption of travel ties with another city. Travellers from mainland China and neighbouring Macau still face 14 days in quarantine.
Singapore has already announced pacts on essential business and official travel from China, Indonesia, Japan, Malaysia, South Korea, and opened unilaterally to general visitors from Brunei, New Zealand, Vietnam and most of Australia.
This week, Singapore eased quarantine to just seven days for travellers from Hong Kong, from 14 earlier. It has put the city on its list of low-risk places.
International travel in Asia has collapsed during the pandemic because of border closures, with passenger numbers down 97% in August, the Association of Asia Pacific Airlines says.
Following the news, shares in Hong Kong airline Cathay Pacific surged more than 7 percent in afternoon trade.
Hong Kong's daily coronavirus infections have dropped mostly into single digits since August and it has eased some social distancing curbs. Singapore has similarly seen its daily cases fall below 10.
© Reuters, aero.uk | 15/10/2020 12:08