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Europe: Sheremetyevo International Airport
Named the best Airport in Europe, Sheremetyevo International Airport is located in the Moscow Oblast, Russia, 29 km north-west of central Moscow.Reuters
Asia Pacific: Seoul Incheon International Airport
The best airport in Asian Pacific, Incheon International Airport (IIA) is the largest airport in South Korea, the primary airport serving the Seoul national capital area, and one of the largest and busiest airports in the world. The airport, named one of the best in the world for the seventh consequent year, is located 48 km west of Seoul, the capital and largest city of South Korea.Reuters
Africa: Cape Town International Airport
Cape Town International Airport has been named the best in Africa. It is the primary airport that serves the city of Cape Town, and is the second busiest airport in South Africa. The airport is located about 20 kilometers from the main city. It is the only airport in the Cape Town metropolitan area that offers scheduled passenger services.Wikipedia/Andres de Wet
Latin America-Caribbean: Cancun International Airport
Cancún International Airport has been named the best in Latin America-Caribbean region. The airport is located in Cancún, Quintana Roo, on the Caribbean coast of Mexico's Yucatán Peninsula. It is Mexico's second busiest airport.Wikipedia/ Vmzp85
Middle East: Abu Dhabi International Airport
The Abu Dhabi International Airport in the capital of the United Arab Emirates has been named the best in the Middle East. One of the fastest growing airports in the world in terms of passengers and infrastructural development, it is the second largest in the UAE and served over 10 million passengers in 2010.Reuters
North America: Indianapolis
Named the Best in North America, the Indianapolis International Airport is located 11 Kilometers southwest of the central business district of Indianapolis, a city in Marion County, Indiana, United States. It is the largest airport in Indiana.Wikipedia/ xnatedawgx

The Airport Council International (ACI) has named the world's best airports in its Airport Service Quality awards (ASQ).

The ASQ awards are based on surveys gauging passenger satisfaction. Airports are also assessed for infrastructure development, with the total number of customers and airlines also taken into account.

The ACI's assessment is considered a key benchmark for customer service in the industry and is believed to be a reliable performance indicator of every airport's service levels.

"This an exciting time for airports. As airports and their operators increasingly accept the positive correlation between passenger satisfaction and airport revenues, we see more and more airports striving to meet, and in some cases exceed, the levels of customer service that their passengers expect from their favoured product and service providers," ACI World Director General Angela Gittens stated on the organisation's website.

"Airports that deliver superior customer service stand apart from the competition and superior customer service remains one of the most important differentiators in the increasingly competitive airport industry," she added.    

According to ACI's latest assessment, the top six airports in the world (region-wise) are Moscow's Sheremetyevo International Airport (for Europe), Seoul Incheon International Airport in the South Korean capital (for Asia Pacific), Cape Town Airport in South Africa (for Africa), Cancun International Airport in Mexico (for Latin America-Caribbean), Abu Dhabi International Airport (for the Middle East), and Indianapolis Airport (for North America).

As well as regional toppers, the ACI also lists the best airports in three more categories: by size; by improvements; and by region (fewer than two million passengers).

Check out the complete list here.

Start the slideshow to see the world's top six airports...