Find flights
When to book
FAQs

Cheap flights from Washington, D.C. to Belfast from £236

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
25 abr. — 2 may.1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington, D.C. to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from Washington, D.C. to Belfast
Explore the most affordable flight options available from Washington, D.C. to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 marzo 2026.

sáb. 9/520:30
IAD
-
BFS
2 stops19h 10m
Multiple Airlines
sáb. 16/507:40
BFS
-
IAD
3 stops35h 35m
Multiple Airlines
Deal found 25/3£567
sáb. 9/520:30
BWI
-
BFS
2 stops19h 10m
Multiple Airlines
sáb. 16/507:40
BFS
-
BWI
3 stops19h 35m
Multiple Airlines
Deal found 25/3£574
lun. 6/420:30
IAD
-
BFS
3 stops21h 50m
Multiple Airlines
jue. 16/413:50
BFS
-
IAD
3 stops30h 20m
Multiple Airlines
Deal found 21/3£590
mié. 27/516:05
IAD
-
BFS
2 stops24h 05m
Multiple Airlines
lun. 1/609:15
BFS
-
IAD
3 stops34h 00m
Multiple Airlines
Deal found 22/3£627
jue. 7/520:30
BWI
-
BFS
3 stops21h 30m
Multiple Airlines
jue. 14/506:40
BFS
-
BWI
3 stops20h 35m
Multiple Airlines
Deal found 23/3£627
jue. 7/520:20
IAD
-
BFS
2 stops21h 30m
Multiple Airlines
jue. 14/516:40
BFS
-
IAD
2 stops29h 20m
Multiple Airlines
Deal found 23/3£676
dom. 23/819:15
IAD
-
BHD
1 stop10h 15m
British Airways
jue. 10/909:35
BHD
-
IAD
1 stop11h 15m
British Airways
Deal found 24/3£677
lun. 24/817:40
IAD
-
BHD
1 stop14h 15m
British Airways
lun. 31/819:35
BHD
-
IAD
1 stop29h 45m
British Airways
Deal found 22/3£688
lun. 24/821:30
BWI
-
BHD
1 stop10h 25m
British Airways
lun. 31/819:35
BHD
-
BWI
1 stop26h 40m
British Airways
Deal found 22/3£688
lun. 24/817:40
IAD
-
BHD
1 stop14h 15m
British Airways
jue. 10/920:35
BHD
-
IAD
1 stop25h 50m
British Airways
Deal found 24/3£692
dom. 23/821:35
BWI
-
BHD
1 stop12h 00m
British Airways
mié. 2/906:30
BHD
-
BWI
1 stop15h 45m
British Airways
Deal found 23/3£692
mié. 2/914:54
DCA
-
BHD
2 stops17h 41m
British Airways
lun. 12/1019:35
BHD
-
DCA
2 stops27h 52m
British Airways
Deal found 24/3£692

Find flight deals from Washington, D.C. to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) to Belfast (BF1). 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 26 marzo 2026.

Round-trip from

£567

One-way from

£236
9/5-16/5
  • 9/5-16/5
  • 5 total stops
  • 54h 45m total
  • Washington, D.C. to Belfast
Search Deals
23/8
  • 23/8
  • 2 total stops
  • 20h 00m total
  • Washington, D.C. to Belfast
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to Belfast 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 26 marzo 2026.
Use the filters below to find and compare flights from Washington, D.C. to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

sáb. 9/5

20:30-20:40

2 stops19h 10m

Belfast Intl

sáb. 16/5

07:40-14:15

3 stops35h 35m

£567

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

sáb. 9/5

20:30-20:40

2 stops19h 10m

Belfast Intl

sáb. 16/5

07:40-22:15

3 stops19h 35m

£574

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

lun. 6/4

20:30-23:20

3 stops21h 50m

Belfast Intl

jue. 16/4

13:50-15:10

3 stops30h 20m

£590

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

mié. 27/5

16:05-21:10

2 stops24h 05m

Belfast Intl

lun. 1/6

09:15-14:15

3 stops34h 00m

£627

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

jue. 7/5

20:30-23:00

3 stops21h 30m

Belfast Intl

jue. 14/5

06:40-22:15

3 stops20h 35m

£627

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

jue. 7/5

20:20-22:50

2 stops21h 30m

Belfast Intl

jue. 14/5

16:40-17:00

2 stops29h 20m

£676

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

dom. 6/9

17:40-10:30

1 stop11h 50m

Belfast City

mié. 16/9

10:05-19:40

1 stop14h 35m

£688

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

lun. 24/8

17:40-12:55

1 stop14h 15m

Belfast City

mar. 8/9

09:40-20:20

1 stop15h 40m

£692

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

mar. 25/8

17:40-10:45

1 stop12h 05m

Belfast City

mié. 9/9

10:05-19:40

1 stop14h 35m

£692

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

mié. 2/9

14:54-13:35

2 stops17h 41m

Belfast City

lun. 12/10

19:35-18:27

2 stops27h 52m

£692

Flights are sorted by cheapest return flights first.

Deals found on 21/3

Showing 1-10 of 44 resultsSorted by cheapest first
1
2
3
...
5

Best time to book a flight from Washington, D.C. to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Washington, D.C. with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Belfast
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Belfast. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Washington, D.C. to Belfast?

    British Airways and KLM can get you from Washington, D.C. to Belfast in just under 11h 50m. Your travel time can differ by up to 2h 50m. Airlines will cover a distance of 3390 mi. Both multi-stop and direct flights can be found to your destination and back.

  • What are the most popular routes from Washington, D.C. to Belfast?

    The most popular flight routes from Washington, D.C. to Belfast are Washington, D.C. Dulles Intl - Belfast Intl, Washington, D.C. Reagan-National - Belfast Intl and Washington, D.C. Reagan-National - Belfast City.

  • Can I find deals for flights from Washington, D.C. to Belfast that include hotel bookings?

    Yes. In addition to deals on Washington, D.C. to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Washington, D.C. to Belfast?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington, D.C. to Belfast.

  • Can I find deals for business class flights from Washington, D.C. to Belfast?

    Yes. Cheapflights offers flight deals from Washington, D.C. to Belfast by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse 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.

Complete your trip

Complete your trip to Belfast by adding a car hire and/or hotel booking to your travel itinerary.
Belfast car hire
Belfast Intl Airport car hire
Londonderry Eglinton Airport car hire
Isle of Islay Glenegedale Airport car hire
Londonderry car hire

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 Washington, D.C. to Belfast?

Cheapflights makes it easy to find Washington, D.C. to Belfast 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 Washington, D.C. to Belfast?

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 Belfast from Washington, D.C..

Can Cheapflights find flights from Washington, D.C. to Belfast with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Washington, D.C. to Belfast, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Belfast become cheaper?

Yes, Cheapflights offers price alerts on Washington, D.C. to Belfast flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.