The local airports are Reagan National Airport, Dulles International Airport,
and Baltimore-Washington International Airport. The Doubletree Hotel has a
free shuttle to and from Reagan National Airport (approx. 5 miles).
For those of you who are traveling in from California, JetBlue has great
rates out of Long Beach and Oakland into Dulles (approx. 35 miles from the hotel).

The following websites are good resources for affordable airfare:

Travelocity
Hotwire
Orbitz
Cheap Fares