Frequency of domestic routes 2017

The world's busiest domestic routes in 2017, ranked by frequency of flights*

by E. Mazareanu, last edited Aug 9, 2019
Frequency of domestic routes 2017 One could be forgiven for expecting the world’s busiest domestic air route to link two major megalopolises, each with populations in the tens of millions. However, it is not until the third busiest – Mumbai to Delhi –that this is the case. Instead, the busiest air route was Seoul to the tourist island of Jeju, which recorded almost 65,000 flights, followed by Sydney to Melbourne with just under 55,000 flights.

Domestic versus international routes

Domestic air routes, defined as commercial flights between two airports that are in the same country, tend to be busier than international air routes. Even the busiest international air route – Hong Kong to Taipei – recorded less than half the number of flights in 2017 than the busiest domestic route.

Causes of air traffic

Population is clearly a factor for high levels of air traffic, with just over half of the busiest domestic air routes involving the most populous global megacities. However, a lack of alternative travel infrastructure can also play a major role. For example, Brisbane, Melbourne and Sydney – which together account for two of the busiest air routes, despite their relatively small populationsare yet to be linked by high-speed intercity rail.
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The world's busiest domestic routes in 2017, ranked by frequency of flights*

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