According to the UK-based air travel analytics company, Official Airline Guide (OAG), the Jeju-Seoul Gimpo flight in South Korea was the world's busiest domestic route in May 2022, with 1,261,409 scheduled seats.
Second place went to the Hanoi-Ho Chi Minh City route in Vietnam, with 935,598 scheduled seats.
Interestingly, the data shows that the Jakarta-Denpasar flight is the busiest route in Indonesia. The Jakarta-Denpasar route ranked 6th as the busiest flight route in the world.
OAG recorded 709,049 seats for flights from Soekarno-Hatta International Airport (CGK) to I Gusti Ngurah Rai International Airport, Denpasar (DPS) in May 2022.
Here is a list of the 10 busiest domestic flight routes in the world in May 2022:
1. Jeju International-Seoul Gimpo - 1,261,409 seats
2. Hanoi-Ho Chi Minh City - 935,598 seats
3. Sapporo New Chitose-Tokyo Haneda - 902,833 seats
4. Fukuoka-Tokyo Haneda - 901,760 seats
5. Melbourne-Sydney - 809,242 seats
6. Jakarta-Denpasar Bali - 709,049 seats
7. Jeddah-Riyadh - 652,156 seats
8. Mumbai-Delhi - 638,576 seats
9. Tokyo Haneda-Okinawa Naha - 601,604 seats
10. Beijing-Shanghai Hongqiao - 585,966 seats
(Read More: 10 Airlines with the Largest Market Capitalization)