Family-Friendly Itinerary for Washington D.C. in 3 Days

• Day 1: National Mall and Smithsonian Museums
  Start your day off at the National Mall, a park spanning over 2 miles that houses various monuments and museums. Explore the Smithsonian museums, including the Natural History Museum and American History Museum. End your day with a visit to the Lincoln Memorial, where you can catch a beautiful view of the city.
  
• Day 2: Mount Vernon and Arlington National Cemetery
  Spend your morning at Mount Vernon, the estate of the first president of the United States, George Washington. Take a guided tour of the mansion and gardens. Afterwards, head to Arlington National Cemetery, where you can pay your respects to fallen soldiers and visit the Tomb of the Unknown Soldier.
  
• Day 3: White House and Georgetown
  Start the day off with a visit to the most famous residence in the United States, the White House. Take a tour of the grounds and see where the president lives and works. Afterward, head to Georgetown for some shopping and to grab a bite to eat.
  

Time and Costs Estimates

• National Mall (3-4 hours, free)
• Mount Vernon (3-4 hours, $28 per adult)
• Arlington National Cemetery (2-3 hours, free)
• White House (1-2 hours, free)
• Georgetown (2-3 hours, depends on shopping and eating choices)
• Total Estimated Costs: $56 per adult

Transportation

Washington D.C. has an extensive public transportation system that includes buses and a subway, known as the Metro. The Metro is the most convenient and affordable option for getting around the city. A day pass costs $13 and allows unlimited rides on the Metro. Taxis and ride-sharing apps are also available, but can be more expensive.

Useful Tips

If you have more time, consider exploring some of the nearby neighborhoods, such as Dupont Circle and Adams Morgan. If you have less time, focus on the National Mall and the White House. Be sure to check the weather forecast and dress appropriately for outdoor activities.

Airports

Washington D.C. has three major airports: Ronald Reagan Washington National Airport (DCA), Washington Dulles International Airport (IAD), and Baltimore/Washington International Thurgood Marshall Airport (BWI). DCA is the closest to the city center, located just 4 miles away. IAD and BWI are both located outside of the city, with IAD being 26 miles away and BWI being 32 miles away.