BUSIEST FLIGHT ROUTES IN THE WORLD

View and interrogate OAG’s ever-popular Busiest Airline Routes whenever you need as they evolve and change over time, regularly providing updates on the busiest flight routes in the world. These include the Top 10 Busiest Global Airline Routes, Top 10 Domestic Airline Routes and International Airline Routes by region. Our flight routes data is powered by Schedules Analyser.

Find extensive flight data and analysis for domestic and international airline routes below and discover the busiest air routes in the area of your choice.

KEY POINTS

• In January 2025, Jeju (CJU) to Seoul (GMP) retains its position as the world’s Busiest Domestic Route with 1.1 million seats, however compared to January 2024 capacity is 14% lower.
• Sapporo New Chitose (CTS) to Tokyo Haneda (HND) is the second busiest domestic route with 1 million seats which is 5% higher than last year and is 47,385 (4%) seats below Jeju (CJU) to Seoul (GMP).
• Fukuoka (FUK) to Tokyo Haneda (HND) is in third place with 987,605 seats.
• Jeddah (JED) to Riyadh (RUH) has had the highest capacity growth this year compared to January 2024 with 77k (11%) more seats, with 766,093 seats in January 2025 and is in fifth place.
• Compared to January 2024, Tokyo Haneda (HND) to Osaka (ITM) has moved up into the Top 10 busiest domestic routes in January 2025 with 556,926 seats in tenth place and Shanghai (SHA) to Shenzhen (SZX) has dropped out.

KEY POINTS

• Beijing (PEK) to Shanghai Hongqiao (SHA) remains the Busiest Domestic Route in China in January 2025 with 600,406 seats however capacity has dropped by 9% compared to last year.
• Guangzhou Baiyun (CAN) to Shanghai Hongqiao (SHA) is in second place with 517,792 seats, 12% lower than January 2024.
• Shanghai Hongqiao (SHA) to Shenzhen (SZX) is the third busiest route with 512,327 seats however capacity has dropped by 15% this year compared to January 2024. This is the biggest decrease in the Top 10 busiest domestic routes in China.
• Chongqing (CKG) to Shenzhen (SZX) has had the biggest capacity increase year on year adding 12% more seats and is in tenth place.

KEY POINTS

• Honolulu (HNL) to Kahului (OGG) is the Busiest Domestic Route in the USA in January 2025 with 284,170 seats, a similar capacity to last year.
• Denver (DEN) to Phoenix (PHX) is the second busiest route with 281,876 seats, just 2,294 (1%) seats behind the busiest route.
• Las Vegas (LAS) to Los Angeles (LAX) is in third place, moving up from fifth place last year, with 277,860 seats.
• Los Angeles (LAX) to San Francisco (SFO) has had the biggest increase in capacity in the Top 10 in January 2025 compared to January 2024 adding 23% more seats and is the fifth busiest domestic route in the USA.
• Atlanta (ATL) to Fort Lauderdale (FLL) has had the biggest decrease in capacity year on year with seats dropping by 17% which moves the route from being the third busiest domestic route in the USA last year to eighth in January 2025.
• New York La Guardia (LGA) to Chicago O’Hare (ORD) and Newark (EWR) to Orlando (MCO) have both moved up into the Top 10 busiest domestic routes in the USA and Denver (DEN) to Las Vegas (LAS) and Atlanta (ATL) to Miami (MIA) have dropped out. 

KEY POINTS

• In January 2025, Hong Kong (HKG) to Taipei (TPE) continues to be the Busiest International Route with 623,352 seats, a 14% increase in capacity compared to January 2024. Kuala Lumpur (KUL) to Singapore Changi (SIN) is the second busiest international route with 471,360 seats, a capacity increase of 15% compared to last year. Cairo (CAI) to Jeddah (JED) is in third place with 466,784 seats which is at a similar capacity to last year.
  
  
• Four routes in the Top 10 busiest international routes have over 10% capacity growth in January 2025 compared to January 2024;
  • Hong Kong (HKG) to Taipei (TPE) with 14% capacity growth which is the busiest international route,
  • Kuala Lumpur (KUL) to Singapore Changi (SIN) with 15% capacity growth in second place,
  • Jakarta (CGK) to Singapore Changi (SIN) with 16% capacity growth in sixth place,
  • Bangkok (BKK) to Hong Kong (HKG) with 11% capacity growth in eighth place.
    
    
• No routes in the Top 10 have had a capacity decrease year on year.
• Jakarta (CGK) to Kuala Lumpur (KUL) has moved up into the Top 10 this month compared to last year in tenth place and Bangkok (BKK) to Seoul Incheon has dropped out.
  
  
• Only three Global regions are now covered in the Top 10 Busiest International Routes: eight routes from Asia Pacific, two from the Middle East and one from Africa. 

The busiest air routes are defined as those with the largest volume of scheduled airline seats in the current calendar month. Data is for flights in both directions on each route and is sourced from OAG Schedules Analyser in the first week of each month. The data reflects the most recent full calendar month for the busiest scheduled domestic and international aviation routes in each category.