The Jeju-Seoul Gimpo city pairing was busiest last year, even outperforming top international routes amid a ravaging Covid-19 pandemic that devastated global air travel.
The pairing saw 10.2 million passengers flying in last year, but traffic was still 35% lower than in 2019. In second place was the Hanoi-Ho Chi Minh City pairing with 5.9 million passengers, followed by Shanghai-Hongqiao-Shenzhen (3.7 million).
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