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, this isn't the case. Instead, the busiest air route was Jejul to Seoul, which recorded almost 85,500 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.
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OAG. (April 7, 2020). The world's busiest domestic routes in 2019, ranked by frequency of flights [Graph]. In Statista. Retrieved December 05, 2024, from https://www.statista.com/statistics/794380/frequency-of-domestic-routes/
OAG. "The world's busiest domestic routes in 2019, ranked by frequency of flights." Chart. April 7, 2020. Statista. Accessed December 05, 2024. https://www.statista.com/statistics/794380/frequency-of-domestic-routes/
OAG. (2020). The world's busiest domestic routes in 2019, ranked by frequency of flights. Statista. Statista Inc.. Accessed: December 05, 2024. https://www.statista.com/statistics/794380/frequency-of-domestic-routes/
OAG. "The World's Busiest Domestic Routes in 2019, Ranked by Frequency of Flights." Statista, Statista Inc., 7 Apr 2020, https://www.statista.com/statistics/794380/frequency-of-domestic-routes/
OAG, The world's busiest domestic routes in 2019, ranked by frequency of flights Statista, https://www.statista.com/statistics/794380/frequency-of-domestic-routes/ (last visited December 05, 2024)
The world's busiest domestic routes in 2019, ranked by frequency of flights [Graph], OAG, April 7, 2020. [Online]. Available: https://www.statista.com/statistics/794380/frequency-of-domestic-routes/