United Airlines carried approximately 16.6 million passengers to, from, and via its Washington Dulles hub in the 12 months to June 2024. That finding was based the US Department of Transportation T-100 data, which showed that the carrier accounted for about 68% of traffic. It would, of course, be higher if other Star Alliance members were included. On a typical day, more than 45,000 passengers flew United and its regional unit, United Express.