List of busiest passenger flight routes
These are lists of the busiest flight routes by the number of passengers flown, by seat capacity and by aircraft movements in the 2020s. For previous data, see List of busiest passenger flight routes, 2010s
Global statistics
By available seats
The following are the lists of the world's busiest flight routes based on the number of seats available in the flights scheduled in both directions. Note that these statistics do not consider the number of passengers actually carried. OAG did not conduct the busiest flights survey in 2020.Top 10 flight routes by available seats
| Rank | Airport 1 | Airport 2 | Distance | 2024 | 2023 | 2022 | 2021 | ||||||||||||
| 1 |  ROKBy aircraft movementsThe following are the lists of the world's busiest flight routes based on the number of scheduled flights in both directions. Note that these statistics do not consider the number of passengers carried.InternationalThe only international route to make the Top 50 busiest routes in 2021 was between Saint Barthélemy (SBH) and Sint Maarten (SXM).Regional statisticsEuropeBusiest flight routes inside the EU, UK, Switzerland, Iceland and Norway. Figures are only available for EU countries, Switzerland, Iceland and Norway. Passengers of domestic routes in countries is fewer than 1 million, except for Russia, Ukraine, and Turkey, based on airport statistics among other European countries. The St. Petersburg Pulkovo Airport – Moscow route was used by 2,965,331 passengers in 2013.The UK has not reported for 2021 and parts of 2020, due to Brexit, but data is available from EU/Eurostat countries for flights to/from the UK, but not for UK domestic or UK intercontinental flights. The multiple airports of London lower the airport-to-airport figures; the busiest UK domestic route in 2019 was Heathrow – Edinburgh with 1,196,921.
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Spain
Mexico