Airlines

There are three airports in the Washington, D.C. area: Reagan National Airport (DCA), Dulles International Airport (IAD) and Baltimore/Washington International Thurgood Marshall Airport (BWI).

A flight comparison site such as Hipmunk is recommended to get an idea of the prices on several airlines (most sites don’t include Southwest Airlines, by the way).  You can also set up a fare alert from Airfare Watchdog, which will let you know when there’s a good fare to Boston.

American Airlines
AMERICAN AIRLINES
Enter code A84N4AZ for 5 percent off the lowest applicable published air fare.
Tickets can be purchased at AA.com or 1-800-433-1790.

 

Delta

DELTA AIRLINES
Enter code NMHDD for 5 percent off discounted airline price or 10 percent off full or nonrestricted prices.
Reservations: delta.com or 1-800-328-1111 (a direct ticket charge will apply when booking by phone).