Travel research site Wanderbat rated the world's top airlines, and gave Qatar Airways a perfect score for reliability.
From an article at The Daily Mail:
Qatar Airways has been named the most reliable airline in the world, thanks to flight punctuality, its modern fleet and the minimal extra fees it charges.
We welcomed Qatar Airways as a member of the World Trade Center of Greater Philadelphia in January 2015. Qatar Airways is a member of our Leadership Council, and offers discounted airfare to WTCGP members (contact us for the code).