Netflights is free and simple to use. You can view all five of the weekly flights to or via Washington DC, flown by one airlines. Having them all in one place makes it easy to compare prices and find the best deal for you.
Washington DC actually has one airports. We've looked at all your options and found that, usually, Washington DC Ronald Reagan Washington National Airport is the cheapest airport to fly into. You should also look out for flights with JetBlue – they often have the cheapest prices.
Chicago O'hare International Airport is the cheapest airport to fly to Washington DC from. Searching by month is the best way to get a feel for the overall cost of flights throughout the year.
It's 927 km from Chicago to Washington DC, and the flight takes around 14 hrs 35 mins. Need somewhere to stay when you get there? You can add also accommodation and car hire to your Washington DC booking on Netflights.