Changi Airport has got off to a good start in the second half of the year, handling 5.18 million passengers last month - 5.9 per cent more than in the same month a year ago.
In June, the rise from 12 months earlier was 3 per cent.
However, there is some concern that an increasing number of people infected with the Zika virus here may have an impact on future traffic.
Australia, the United Kingdom and Taiwan have warned travellers about the dangers of the mosquito- borne virus, especially for pregnant women and those planning pregnancy.
Changi Airport Group spokesman Ivan Tan said the airport is monitoring the situation.
To and from China
To and from Melbourne
Traffic to and from Singapore remains strong as airlines continue to add new flights and operate bigger planes to meet a growing demand for air travel.
Among Changi's key markets, traffic to and from China grew by 13.4 per cent last month while traffic to and from Melbourne, Australia, increased by 20.6 per cent compared with July last year.
Earlier this month, Indian carrier Jet Airways started operating its biggest aircraft, the Boeing 777-300ER, on the Mumbai-Singapore sector.
This has led to a 50 per cent capacity increase on the route.
Director Gaurang Shetty said the move "addresses the demand for more seats on the route, at a time when trade and investment between India and Singapore is witnessing a healthy growth".
Changi's growth comes as full-service carriers in Asia are reporting more business.
On Monday, the Association of Asia Pacific Airlines said that member carriers - which include Singapore Airlines, carried a total of 26.2 million international passengers last month - 10.2 per cent more than a year ago.
Director-general Andrew Herdman said: "The overall demand outlook for air passenger markets remains positive as air travellers in the region continue to enjoy the benefits of affordable fares, although demand for some European destinations has been affected by security concerns."