A quarantine-free air travel bubble between Hong Kong and Singapore will open on May 26, the governments said Monday, confirming a long-awaited reopening of connections between the two financial hubs.

To qualify for the flights, travelers from Hong Kong must have had two doses of coronavirus vaccine at least 14 days before, the government said in a statement. This is to encourage citizens to get vaccinated as soon as possible, it said. Travelers from both sides can’t have visited any other places two weeks before departure. Negative COVID-19 test results must be collected within 72 hours of flying.

From May 26 to June 9, there will be one flight a day from Hong Kong to Singapore with 200 travelers per aircraft and another from Singapore to Hong Kong, with the same number of passengers allotted. From June 10, there will be two flights a day from either side.