Cheap flights from Belfast Intl Airport to Washington, D.C. from £339
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 22/11. Fares are subject to change and may not be available on all flights or dates of travel.
Find flight deals from Belfast Intl to Washington, D.C.
One-way flights from Belfast Intl to Washington, D.C.Search for one-way flight options from Belfast Intl to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 13 July 2025.
Search for one-way flight options from Belfast Intl to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated 13 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Belfast Intl to Washington, D.C. that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 13 July 2025.
Use the filters below to find and compare flights from Belfast Intl Airport to Washington, D.C. that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
BelfastBaltimore
BFS - BWI
BFSBWI
Belfast Intl
Sat 22/11
22:25-09:55
3 stops40h 30m
BelfastWashington, D.C.
BFS - IAD
BFSIAD
Belfast Intl
Sat 22/11
22:45-22:24
2 stops28h 39m
BelfastWashington, D.C.
BFS - DCA
BFSDCA
Belfast Intl
Sat 22/11
08:10-22:35
2 stops19h 25m
Best time to book a flight from Belfast Intl to Washington, D.C.
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Related info for your journey
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Alternative routes for Belfast Intl to Washington, D.C.
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How does Cheapflights help users find flights from Belfast Intl to Washington, D.C.?
When you search for this flight from Belfast Intl to Washington, D.C., Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.
Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Washington, D.C.?
Cheapflights simply makes it quick and affordable to book flights from Belfast Intl to Washington, D.C. by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.
Can Cheapflights find flights from Belfast Intl to Washington, D.C. with no change fees?
Yes, we can. To see specific flights from Belfast Intl to Washington, D.C. with no change fees, users can toggle flexible booking options after using the search form above to find flights.
Can Cheapflights notify me if prices for flights from Belfast Intl to Washington, D.C. become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Washington, D.C. from Belfast Intl today and book when prices fit your budget.