- 20.95 million passengers flew through BWI Marshall Airport in 2009, an increase of 2.3%. BWI Marshall was one of only two major U.S. airports to show growth in 2009.
- JetBlue Airways launched service at BWI Marshall Airport. The airline offered daily flights between BWI Marshall and Boston.
- Cape Air began service between BWI Marshall Airport and two destinations – Hagerstown, Maryland and Lancaster, Pennsylvania.
- BWI Marshall Airport established a Twitter account to provide travel information and Airport status reports to customers.
- BWI Marshall Airport began the C-D Apron Reconstruction Project, a $41 million project to reconstruct and replace pavement on the aircraft ramp and taxilane located between Concourses C and D. Funding for the project included a $15 million Federal Aviation Administration grant from the American Recovery and Reinvestment Act of 2009.
- The USO of Metropolitan Washington and BWI Marshall Airport celebrated the 10th Anniversary of the USO International Gateway Lounge. More than 600,000 military service members and their families have used the facility at BWI Marshall Airport since it opened in December 1999.