Why Chicago O’Hare Is The Most Dominant Hub Airport In The US

Chicago O’Hare International Airport (ORD) was named the number one most connected airport in the United States and seventh worldwide, according to data from the Official Aviation Guide (OAG) 2025 Megahubs Index. On the airport’s busiest day of the year, Chicago O’Hare offers connections to 214 domestic destinations, more than any other airport in the US. The airport receives more than 100 million passengers per year. Let’s find out why this is the case.

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