BWI Thurgood Marshall Airport is now the busiest airport in the D.C. region.
According to Airports Council International, passenger volume at BWI rose one-and-a-quarter percent last year to make it the nation's 22nd busiest airport.
Dulles slipped to 23rd place after seeing almost a 3 percent drop in volume.
Reagan National ranked 25th.
The three busiest airports were Hartsfield-Jackson Atlanta International, Chicago's O’Hare, and Los Angeles International.
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