Trade groups for the travel industry and airlines warned that the longer DHS funding is lapsed, the longer security lines at the nation's airports could get.

Flights wouldn't be immediately impacted by a government shutdown, but history shows delays and TSA staffing issues grow the longer it lasts.

The shutdown won't affect air traffic controllers but some TSA workers may go without pay.

Trade groups for the travel industry and airlines warned that the longer DHS funding is lapsed, the longer security lines at the nation's airports could get.

Funding for the Department of Homeland Security has run out amid a political impasse over immigration enforcement. Now, Congress is out of town.