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Sydney - Melbourne being the fourth busiest air route in the world

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The most frequent domestic route in Australia ranks as number 4 on the world's busiest routes list. Only three routes in Japan and South Korea offer greater seating capacity.

The list is based on data provided by OAG, a global supplier of airline information.

World's busiest air routes

When comparing the monthly seating capacity, the top 5 busiest routes are all domestic. There's only one to offer more than a million seats per month: Tokyo International (HND) – Chitose. Next on the list is a route connecting South Korean cities Soul and Jeju, followed by another Japanese route Tokyo – Fukuoka. Number four is the above mentioned Sydney Kingsford Smith (SYD) – Melbourne Tullamarine (MEL), providing transport for about quarter of a million passengers per month.

Looking at the actual air movements, Australia's busiest route ranks second in the world with a little under 1,000 flights a month. Number one, Sao Paulo – Rio de Janeiro in Brazil, has slightly more than a thousand flights per month.

Airlines serving the Sydney – Melbourne route

Direct flight are currently offered by 8 airlines:


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