Frequency of domestic routes 2019

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.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 populations – are yet to be linked by high-speed intercity rail.

世人或许预期全球最繁忙的国内航空线路将连接两个人口数以千万计的大都市，然而事实并非如此。相反，最为繁忙的航空线路为济州至首尔，其航班数量高达85,500架次。国内航线与国际航线的对比：国内航线，即指在同一国家内两个机场之间的商业航班，其繁忙程度往往超过国际航线。即便是最繁忙的国际航线——香港至台北——在2017年的航班数量也仅为最繁忙国内航线的不到一半。航空交通量的成因：人口无疑是对航空交通量产生显著影响的因素，超过一半的最繁忙国内航线涉及全球人口最稠密的巨型城市。然而，缺乏替代性交通基础设施亦扮演着举足轻重的角色。例如，布里斯班、墨尔本和悉尼——这三个城市共同构成了全球最繁忙的两条航空线路之一，尽管其人口规模相对较小——但至今尚未实现高速城际铁路的连接。