$574 Find cheap flights from Belfast to Washington, D.C.

In the last 3 days, the lowest price for a flight from Belfast City Airport to Washington, D.C. Dulles Intl Airport was $574 for a one-way ticket and $1,083 for a round-trip.

Yes, you'll most likely have to show a valid passport before boarding the plane in Belfast and on arrival in Washington, D.C..

On your way to Washington, D.C., you’ll fly out from Belfast City. You’ll be landing at Washington, D.C. Dulles Intl.

We unfortunately don’t have that data for this specific route.

Star Alliance, and oneworld are the airline alliances operating flights between Belfast and Washington, D.C., with oneworld being the most commonly used for this route.

KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Belfast to Washington, D.C..

KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington, D.C. from Belfast is likely to change within 7 days, so travelers know whether to wait or book now.

Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Washington, D.C. with an airline and back to Belfast with another airline. Booking your flights between Belfast and IAD can sometimes prove cheaper using this method.

Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Washington, D.C. from Belfast up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.