We've gone through all the flights from Nashville to Washington DC, to help you find the best option. Your journey from will last about 14 hrs.
Or, if you're fairly flexible on dates, try to get a last minute-deal by regularly checking the Netflights website.
Washington DC actually has one airports to choose from – but Washington DC Washington Dulles International Airport (IAD) is the usually the cheapest option. If you need to fly into a specific airport, adjust your search to focus on those flights. The most popular airlines include Alaska Airlines.
But if you can't find one which is right for you, try looking at flights to other cities in the USA to check out some other options.