Cheap flights from Belfast Intl Airport to Washington, D.C. from £406
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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Belfast Intl to Washington, D.C.
Discover tips and strategies to find the most affordable flight options for your journey from Belfast Intl (BFS) to Washington, D.C. (WAS). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 18 September 2025.
Round-trip from | £589 |
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One-way from | £406 |
Find flight deals from Belfast Intl to Washington, D.C.
Cheapest flights from Belfast Intl to Washington, D.C.Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.
Explore the most affordable flight options available from Belfast Intl to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 18 September 2025.
Cheapflights Fare Finder
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
BelfastWashington, D.C.
BFS - IAD
BFSIAD
Belfast Intl
Thu 16/10
09:25-20:50
3 stops40h 25m
Washington, D.C. Dulles Intl
Thu 23/10
22:20-23:59
3 stops20h 39m
BelfastBaltimore
BFS - BWI
BFSBWI
Belfast Intl
Thu 16/10
06:00-17:40
2 stops16h 40m
Baltimore/Washington
Thu 23/10
20:30-23:10
2 stops21h 40m
BelfastWashington, D.C.
BFS - DCA
BFSDCA
Belfast Intl
Tue 14/10
08:15-12:04
3 stops32h 49m
Best time to book a flight from Belfast Intl to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Belfast Intl with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Belfast Intl Airport to Washington, D.C.
Related info for your journey
Find useful and relevant information for your journey from Belfast Intl to Washington, D.C.. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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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.