The Southeast Asian hub beat off competition from Incheon Airport in South Korea and Amsterdam Schiphol in the Netherlands, who came second and third.
According to CNN, the award was based on surveys conducted by international travel research and consultancy group Skytrax, who polled 12.1 million passengers over a nine-month period.
The Changi airport offered free city tours to all travelers on a stopover of five hours as well as swimming pool, butterfly garden and cinema.
Changi was also one of the first airports to introduce free WiFi areas and previously scooped the Skytrax best airport award in 2000 before going on to win again in 2006 and 2010.
The Incheon International Airport offered passengers ice rick, golf course and a casino for luxury.
The list was prepared after monitoring a total of 39 services and products, including check-in, arrivals, transfers, shopping, security and immigration, were examined at 395 airports across the world.
Other destinations that appeared in the best airport category included Hong Kong International and Beijing Capital International, carrying on a tradition of strong Asian performance at the awards.
All in all, five out of the top ten airports were based in East Asian cities.
Cape Town International, Lima Jorge Chavez International, Panama Tocumen and Abu Dhabi International won regional prizes for Africa, South America, Central America and the Middle East respectively.
The list of best airports around the world for 2013 is as follows:
1. Singapore Changi Airport
2. Incheon International Airport
3. Amsterdam Schiphol Airport
4. Hong Kong International Airport
5. Beijing Capital International Airport
6. Munich Airport
7. Zurich Airport
8. Vancouver International Airport
9. Tokyo International Airport (Haneda)
10. London Heathrow Airport