Netflights is free and simple to use. You can view all 68 of the weekly flights to or via Washington DC, flown by four airlines. Having them all in one place makes it easy to compare prices and find the best deal for you.
Washington DC actually has two airports. We've looked at all your options and found that, usually, Washington DC Washington Dulles International Airport is the cheapest airport to fly into. You should also look out for flights with British Airways – they often have the cheapest prices.
George Best Belfast City 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.
On average, the 5441 km flight from Belfast to Washington DC takes 13 hrs 15 mins. If you're landing late, why not take a look at hotels near the airport? We've got a range of accommodation and car hire options across the USA.