Quick Barcelona Fact

The route between Barcelona and Madrid has topped the list of ‘world’s busiest routes’, edging up from second place this time last year. It knocks the Brazilian route between Sao Paulo and Rio de Janeiro off the top spot, based on the number of flights operating per week.

Rounding out the five busiest routes were the following city pairs: Melbourne-Sydney (Australia), Jakarta-Surabaya (Indonesia) and Honolulu-Kahului (Hawaii). No other U.S. routes made OAG’s top ten list. Source