Baltimore-Washington International Thurgood Marshall Airport had the busiest October in its history, continuing a six-month string of setting records for passenger traffic, the Maryland Aviation Administration said Monday.

Almost 2 million passengers, 1,994,905, passed through BWI during the month – a 7.2 percent increase over October a year ago, BWI has recorded year-to-year increases in traffic for 16 of the last 17 months, failing to show growth only in February, when two snowstorms closed the airport.

The airport marked its busiest month ever in July.

 More than half the passengers who used BWI in October traveled on Southwest Airlines, which carried 1,085,361 to and from the airport that month – a 9.2 percent increase from the same month in 2009.