This article originally was published on Oct. 8, 2018, on Forbes.com.
OAG has released its third-annual “Megahub” studies of international and United States airport connectivity. The studies calculate the number of unique online connections that a traveler can make at a given airport on the day of the year with the most flights at that airport. This year’s results are generally unsurprising, with London’s Heathrow retaining its ranking as the most connected airport in the world, followed by Chicago O’Hare, Frankfurt, Amsterdam and Toronto Pearson. Domestically, the most connected airport is O’Hare, followed by Atlanta, Charlotte, Dallas-Fort Worth and Denver.