The busiest domestic route of the world operates between Jeju and Seoul Gimpo. It has nearly 80,000 annual flights operated by seven carriers providing over 200 daily services, as per the report.

The second busiest domestic route is in Australia, operating from Melbourne to Sydney with around 148 flights each day.

Mumbai-Delhi route remains the 3rd busiest domestic route in the world with a total operation of 45,188 flights in 6 carriers, as per a report.

The world's leading provider of digital flight information, OAG, on Tuesday, released its 'Busiest Routes 2019' report, providing information about 20 of the busiest international and domestic routes for the year 2018.