The world’s top 25 most connected airports

As a business traveller, or travel booker, you’re likely familiar with many of the world’s largest and busiest airports. As demand for international travel rises, the race for further connectivity is driving airlines and airports to provide more options for travellers. Statistics from the International Air Transport Association (IATA), show that commercial aircrafts will fly nearly four billion passengers around the world in 2017 alone1! Well, the results are in and we now know which of these aviation megahubs rank in the world’s top 25 most connected airports.

The newly released OAG Megahubs International Index 2017 shows which of the world’s airports are the most internationally connected. The list was collated based on international and domestic connections on the busiest day for global aviation in 2016.

To calculate the top 25, OAG studied the world’s busiest airports and compared the number of scheduled connections to and from international flights with the number of destinations that are flown to from each airport. The Top 25 Most Connected Airports are those with the highest ratio of possible scheduled international connections to the number of destinations served by the airport. The airports are ranked based on this ratio, otherwise known as their Connectivity Index (CI).

Key findings:

  • London Heathrow Airport (LHR) maintains its number one spot, with a CI 379. Data showed a single day in July 2016 listing 72,000 possible international connections within a 6-hour period.
  • The top three are all European airports, including Frankfurt (FRA) and Amsterdam (AMS).
  • Singapore Airport (SIN) was ranked the most connected airport for the Asia Pacific region, with over 35,000 possible international connections listed on a single day in July 2016.
  • The only Australian airport to make the list is Sydney Airport (SYD), ranking at number 24 with a CI 167.
  • The United States has more airports in the top 25 than any other county, with seven airports including Chicago O’Hare Airport (ORD), Hartsfield-Jackson Atlanta International Airport (ATL), Los Angeles International Airport (LAX), Miami International Airport (MIA), John F. Kennedy International Airport (JFK), Houston Airport (IAH) and Newark Liberty International Airport (EWR).

(Click to enlarge)

World's most connected airports


Ci index


How many of the world’s top 25 most connected airports have you visited?



For a free, no-obligation review of your travel program, or for further business travel tips and travel management advice, get in touch with a CTM travel expert: