A surge in flights between Sydney and Melbourne has seen the route climb back into the world's 10 busiest, data shows.
Flight data analyst OAG ranks the world's busiest routes by the number of seats available. In April, Sydney-Melbourne climbed to number seven on the top 10 list, with 598,779 seats.
As Australia's airlines reduced domestic capacity in the wake of the COVID-19 outbreak and state border closures last year, the Sydney-Melbourne route disappeared from the top 10.
Previously it was the second-busiest route in the world, behind only South Korea's domestic route between Seoul and Jeju island. The latter route remains the world's busiest now, with more than 1.4 million seats for April.