US, UK dominate ranking of world's worst airports for business travelers

Brussels South Charleroi Airport in Belgium was named the worst with an average rating of 1.2 out of 10, followed by Berlin Brandenburg Airport in Germany and Leeds Bradford Airport in the U.K.

Belgium’s Charleroi is known as a hub for low-cost airlines, but "the advantage of flying from Charleroi Airport (Brussels South) is that you can be sure that wherever you fly to, it will be better organized," one business traveler complained.

"T2 is hardly used, and everyone is standing like cattle in the far too small gates at T1. Boarding always at the same time as close as possible to connecting gates, which the returning travelers also must go through."

The ratings collated passenger reviews of major airports worldwide from airlinequality.com. Average ratings from reviewers categorized as business travelers were used to rank the world’s 20 worst airports.

Australia’s Perth Airport was the seventh worst in the world.

Noi Bai International Airport in Hanoi has been voted the world's best by business travelers with an average rating of 6.8 out of 10, followed by Singapore's Changi Airport.