The Transportation Department has tentatively awarded room for five new daily long-haul flights at Ronald Reagan Washington National Airport to five of the nation's biggest airlines while rejecting proposals from some low-fare carriers.

As part of this order, five U.S. airlines have been awarded two slot exemptions each, allowing them to launch new nonstop services from Washington National Airport. These routes will serve major destinations across the United States.

The decision would add routes to San Diego and San Antonio, Texas, and increase capacity to Seattle, San Francisco and Las Vegas.