Baltimore-Washington International Thurgood Marshall Airport saw a record number of passengers in 2012 -- the third year in a row it has broken its own record, Maryland Gov. Martin O'Malley announced Tuesday.

BWI had 22.68 million passengers last year -- a 1.3 percent increase over 2011. The number of international travelers rose a whopping 20.7 percent.

"The sustained growth and success at BWI Marshall highlights its position as an important business and tourism gateway, as well as a job generator," O'Malley said. "This record-setting achievement affirms the airport's role as a critical transportation and economic development resource for Maryland and the national capital region."

Most of BWI's passengers -- 71.2 percent -- flew on Southwest or its subsidiary, Air Tran, airlines known for their low-cost flights.

BWI and Ronald Reagan Washington National Airport saw record growth in 2012, while Washington Dulles International is losing passengers, The Washington Examiner previously reported.