When AirHelp recently announced its ranking of 141 airports across the world, Hamad International Airport in Qatar, Athens International Airport in Greece and Haneda Airport in Tokyo were given reason to celebrate. The top three airports on the list all earned praise for their friendly service, timeliness and clean, modern amenities.

Unfortunately, not every airport came out looking so good.

The following 20 worst airports earned the lowest marks, based on data assessing on-time performance, public reviews of quality of service and passenger sentiment on social media. Suffice to say, these airports have provided passengers plenty to complain about.