The statistic shows the world's busiest international routes in 2019, sorted by frequency of flights. That year, the route between Kuala Lumpur International Airport to Singapore Changi Airport was ranked as the busiest international route, with some 29,993 flights.
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OAG. (April 7, 2020). The world's busiest international routes in 2019, ranked by frequency of flights [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 24, 2026, from /statistics/794341/frequency-of-international-routes/
OAG. "The world's busiest international routes in 2019, ranked by frequency of flights." Chart. April 7, 2020. ÌÇÐÄÆƽâ°æ. Accessed July 24, 2026. /statistics/794341/frequency-of-international-routes/
OAG. (2020). The world's busiest international routes in 2019, ranked by frequency of flights. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 24, 2026. /statistics/794341/frequency-of-international-routes/
OAG. "The World's Busiest International Routes in 2019, Ranked by Frequency of Flights." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 7 Apr 2020, /statistics/794341/frequency-of-international-routes/
OAG, The world's busiest international routes in 2019, ranked by frequency of flights ÌÇÐÄÆƽâ°æ, /statistics/794341/frequency-of-international-routes/ (last visited July 24, 2026)
The world's busiest international routes in 2019, ranked by frequency of flights [Graph], OAG, April 7, 2020. [Online]. Available: /statistics/794341/frequency-of-international-routes/
