Cheap flights from Belfast to Washington, D.C. from £296
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 15/12. Fares are subject to change and may not be available on all flights or dates of travel.
Find flight deals from Belfast to Washington, D.C.
Cheapest flights from Belfast to Washington, D.C.Explore the most affordable flight options available from Belfast to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.
Explore the most affordable flight options available from Belfast to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 October 2025.
Cheap flight deals from Belfast to Washington, D.C.
Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) 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 17 October 2025.
Cheapflights Fare Finder
Use the filters below to find and compare flights from Belfast 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
Sun 30/11
22:45-15:35
3 stops45h 50m
Washington, D.C. Dulles Intl
Sun 7/12
22:30-18:55
2 stops15h 25m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Thu 13/11
10:40-15:35
1 stop33h 55m
Washington, D.C. Dulles Intl
Mon 17/11
11:25-10:40
2 stops18h 15m
BelfastWashington, D.C.
BHD - DCA
BHDDCA
Belfast City
Thu 4/12
11:05-21:30
2 stops15h 25m
Washington, D.C. Reagan-National
Mon 8/12
17:22-14:15
2 stops15h 53m
BelfastWashington, D.C.
BHD - DCA
BHDDCA
Belfast City
Thu 5/3
09:05-18:14
2 stops14h 09m
Washington, D.C. Reagan-National
Mon 9/3
13:10-10:40
2 stops17h 30m
BelfastBaltimore
BHD - BWI
BHDBWI
Belfast City
Fri 6/3
06:45-18:45
1 stop17h 00m
Baltimore/Washington
Tue 10/3
21:35-11:30
1 stop9h 55m
BelfastBaltimore
BFS - BWI
BFSBWI
Belfast Intl
Sun 30/11
23:05-18:40
2 stops24h 35m
Baltimore/Washington
Sun 7/12
19:40-18:55
2 stops18h 15m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Thu 13/11
10:35-19:30
2 stops13h 55m
Washington, D.C. Dulles Intl
Mon 17/11
21:45-16:20
2 stops13h 35m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Wed 1/4
06:30-15:35
1 stop14h 05m
Washington, D.C. Dulles Intl
Sun 5/4
19:59-21:20
2 stops20h 21m
BelfastWashington, D.C.
BHD - DCA
BHDDCA
Belfast City
Wed 1/4
06:30-18:06
2 stops16h 36m
Washington, D.C. Reagan-National
Sun 5/4
17:00-16:55
2 stops18h 55m
BelfastBaltimore
BHD - BWI
BHDBWI
Belfast City
Tue 10/3
11:25-19:45
1 stop12h 20m
Baltimore/Washington
Wed 11/3
20:19-16:35
2 stops16h 16m
Best time to book a flight from Belfast to Washington, D.C.
Have a flexible travel schedule? Discover the best time to fly to Washington, D.C. from Belfast with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Belfast to Washington, D.C.
What is the cheapest time of day to fly from BFS to WAS?
Find hourly flight availability from Belfast to Washington, D.C.. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 October 2025.
When flying from Belfast to Washington, D.C., the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 36% versus a flight in the afternoon.
Related info for your journey
Find useful and relevant information for your journey from Belfast 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.
Travelling to a place near Washington, D.C.?
Book flights to Washington, D.C. if you plan to visit one of these locationsBrowse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Belfast to Washington, D.C.
See prices for flight routes from nearby airports that may be better suited for you.
Fly with Cheapflights
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
How does Cheapflights help users find flights from Belfast to Washington, D.C.?
Cheapflights makes it easy to find Belfast to Washington, D.C. flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.
Why should you use Cheapflights to find cheap flight tickets from Belfast to Washington, D.C.?
By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Washington, D.C. from Belfast.
Can Cheapflights find flights from Belfast to Washington, D.C. with no change fees?
Yes, we can. To see specific flights from Belfast 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 to Washington, D.C. become cheaper?
Not ready to book yet? You can track prices for flights from Belfast to Washington, D.C. on Cheapflights with our Price Alert feature and get notified when better prices are available.