Singapore and Hong Kong are set to launch an air travel bubble which beginning on May 26th, 2021. If the visitors fulfil the conditions of travelling within the air travel bubble, they will not have to go through quarantine. SG ang HKG had previously announced a travel bubble in November 2020 that never happened due to the sudden surge of COVID-19 cases.

Under the new travel bubble plan, Hong Kong travellers must be fully vaccinated two weeks prior to their date of departure to Singapore. However, this requirement will not be necessary for those who fly from Singapore to Hong Kong. Singapore's Ministry of Transport (MOT) said that the travel bubble will have a cautious start. There will be one flight a day in each direction, capped at 200 passengers on each flight for the first two weeks.

Singapore Airlines has announced its flight schedule for the SIN-HKG travel bubble from May 26th to June 7th:

9th June 2021 onwards, SIA will operate daily flights to Hong Kong; the schedule is below:

Cathay Pacific's air travel bubble schedule is below:

Travellers from both sides are required to take a swab test 72 hours before departure towards their destination and are required to be screened once again once arrived at their destination.

Hong Kong travellers to Singapore must fill in and submit an arrival card and book a post-arrival virus test three days before arriving. All passengers must be quarantined until they receive a negative test result. Meanwhile, Singapore travellers will have to fill in an online health declaration form 48 hours before arrival in Hong Kong. Passengers are only allowed to leave the airport after getting a negative test result.