Hundreds of flights canceled at 3 D.C.-area airports

LEESBURG, Va.  -- Flights into and out of three airports in the Washington region were affected by a construction-related evacuation at a Federal Aviation Administration facility in Virginia. 

Baltimore-Washington International Thurgood Marshall Airport, Washington Dulles International Airport and Reagan National Airport were all impacted, with flights halted for several hours. Operations resumed around 9:30 p.m. ET. 

American Airlines alone canceled 300 flights on Monday, CBS News' Kris Van Cleave reports. Another 30 flights have already been canceled for Tuesday, Van Cleave reports. American has a hub at Reagan National Airport.

Delta reported at least five flights canceled, Van Cleave reports. Southwest, which has a hub at BWI, and United, with a hub at Dulles, did not give exact numbers on the amount of flights canceled. 

The FAA said in a statement that a facility in Leesburg, Virginia, that handles high altitude flights over the area was evacuated about 6:40 p.m. Monday because of fumes from construction work.

The FAA says that as a result of the evacuation, the facility stopped accepting new flights to handle and handed off airborne flights to other facilities. The FAA said in a statement around 9:15 p.m. that officials have been cleared to send people back into the building and that air traffic controllers would resume operations at the facility again soon.