Cheap Flights to Washington DC 2026 – DCA, IAD & BWI Guide

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Washington DC is served by three airports — Ronald Reagan Washington National (DCA), Washington Dulles International (IAD), and Baltimore/Washington International (BWI) — each with distinct advantages and typically different pricing.

Reagan National (DCA) is closest to DC, with Metro service connecting directly to the city. Its slots system limits which airlines serve it and how many flights operate, which can keep prices higher. However, American and Southwest in particular have strong DCA presences.

Dulles (IAD) is United's DC hub, located 26 miles from downtown in Virginia. It handles international flights and has Silver Line Metro connection (completed in 2022). IAD often has competitive pricing for United itineraries and international routes.

BWI is Baltimore's airport, about 32 miles from DC, and served extensively by Southwest Airlines. BWI often has the cheapest fares to the DC area — Southwest's competitive pricing combined with good Amtrak and MARC train connections to DC (about 30-40 minutes, $7-20) make BWI a strong value option. Our agents at (866) 228-4952 compare all three airports for every DC booking.

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Frequently Asked Questions

Which airport is cheapest to fly into for Washington DC?

BWI (Baltimore) is often cheapest, especially with Southwest. DCA is most convenient but can be pricier. Dulles is competitive for United flights. Call (866) 228-4952 and our agents will calculate the true total cost including ground transportation for all three airports on your specific route.

Is there Metro service to all three DC-area airports?

Reagan National (DCA) has direct Metro service (Blue/Yellow lines). Dulles (IAD) now has Silver Line Metro service. BWI requires MARC train or shuttle connection. DCA is the most convenient for Metro-dependent travelers.

What is free to do in Washington DC?

All Smithsonian museums, the National Mall, National Gallery of Art, US Capitol tours, Library of Congress tours, White House (exterior), and the National Zoo are free. DC offers more free world-class attractions than almost any city in the world.