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Cheap flights from District of Columbia to Belfast from £372

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 28/3. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BHD
7 Dec — 14 Dec1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from District of Columbia to Belfast

Keep the following information in mind while searching for District of Columbia to Belfast flight deals. Data was last updated 7 November 2025.

Round-trip from

£481

One-way from

£372

Popular in

June

Cheapest in

February

Average price

£538
British Airways
  • British Airways
  • 5/3-12/3
  • 2 total stops
  • 24h 50m total
  • District of Columbia to Belfast
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28/3
  • 28/3
  • 2 total stops
  • 22h 35m total
  • District of Columbia to Belfast
Search Deals
Highest demand for flights based on searches. 18% potential increase in price (£106 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£27 potential savings vs. average return price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Find flight deals from District of Columbia to Belfast

Enter your travel dates to find the best prices.

Cheapest flights from District of Columbia to Belfast
Explore the most affordable flight options available from District of Columbia to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 7 November 2025.

Wed 26/1118:05IAD - BHD
1 stop17h 45mMultiple Airlines
Wed 3/1206:30BHD - IAD
1 stop14h 35mMultiple Airlines
Deal found 7/11£496
Fri 14/1118:05IAD - BHD
1 stop21h 55mDelta
Tue 18/1117:20BHD - IAD
1 stop27h 45mDelta
Deal found 6/11£497
Wed 12/1117:03DCA - BHD
2 stops18h 47mDelta
Sun 16/1117:20BHD - DCA
2 stops28h 15mDelta
Deal found 6/11£509
Mon 1/1218:20IAD - BHD
1 stop11h 20mBritish Airways
Fri 12/1208:45BHD - IAD
1 stop16h 10mBritish Airways
Deal found 5/11£567
Mon 1/1221:45IAD - BHD
1 stop11h 30mAmerican Airlines
Fri 12/1206:45BHD - IAD
2 stops15h 14mAmerican Airlines
Deal found 5/11£574
Mon 8/1209:45IAD - BFS
3 stops28h 20mMultiple Airlines
Tue 23/1220:55BFS - IAD
2 stops28h 10mMultiple Airlines
Deal found 5/11£584
Mon 1/1217:03IAD - BHD
2 stops22h 57mDelta
Fri 12/1206:30BHD - IAD
2 stops17h 49mDelta
Deal found 5/11£596
Sat 15/1114:54DCA - BHD
2 stops13h 16mAmerican Airlines
Sat 22/1111:35BHD - DCA
2 stops15h 40mAmerican Airlines
Deal found 5/11£619
Wed 26/1117:05IAD - BHD
2 stops15h 50mAer Lingus
Wed 3/1206:40BHD - IAD
2 stops17h 50mAer Lingus
Deal found 7/11£630
Fri 14/1117:35IAD - BHD
2 stops15h 40mAmerican Airlines
Tue 18/1111:25BHD - IAD
2 stops16h 42mAmerican Airlines
Deal found 6/11£644
Mon 1/1215:37DCA - BHD
2 stops14h 03mBritish Airways
Fri 12/1206:45BHD - DCA
2 stops17h 09mBritish Airways
Deal found 5/11£671
Sat 15/1119:40IAD - BFS
2 stops21h 00mMultiple Airlines
Sat 22/1106:00BFS - IAD
2 stops17h 30mMultiple Airlines
Deal found 5/11£700

Cheapflights Fare Finder

 
Customise your flight search to find flights from District of Columbia 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 7 November 2025.
Use the filters below to find and compare flights from District of Columbia to Belfast that are best for you.

Fly from

District of Columbia

Fly to

Belfast

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 5/3

18:20-10:20

1 stop11h 00m

Belfast City

Thu 12/3

11:05-20:55

1 stop13h 50m

£481

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 16/3

19:20-10:40

1 stop11h 20m

Belfast City

Sun 22/3

06:30-16:40

1 stop14h 10m

£482

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 26/11

18:05-16:50

1 stop17h 45m

Belfast City

Wed 3/12

06:30-16:05

1 stop14h 35m

£496

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 1/12

18:05-21:00

1 stop21h 55m

Belfast City

Fri 12/12

17:20-16:05

1 stop27h 45m

£498

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Mon 5/1

14:35-16:05

2 stops20h 30m

Belfast City

Wed 14/1

06:35-21:24

2 stops19h 49m

£498

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Mon 16/3

16:12-10:40

2 stops14h 28m

Belfast City

Sun 22/3

06:30-16:29

2 stops13h 59m

£499

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 5/3

12:23-16:50

2 stops23h 27m

Belfast City

Thu 12/3

06:30-17:05

1 stop14h 35m

£508

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 16/3

19:59-16:50

2 stops16h 51m

Belfast City

Sun 22/3

17:20-17:05

1 stop27h 45m

£508

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Mon 1/12

17:03-21:00

2 stops22h 57m

Belfast City

Fri 12/12

06:30-22:12

2 stops20h 42m

£509

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Wed 26/11

16:35-16:50

2 stops19h 15m

Belfast City

Wed 3/12

06:30-21:41

2 stops20h 11m

£509

Flights are sorted by cheapest return flights first.

Deals found on 5/11

Showing 1-10 of 19 results
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Best time to book a flight from District of Columbia to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from District of Columbia 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 District of Columbia 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 District of Columbia 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 District of Columbia to Belfast?

    There are many flights that can get you from District of Columbia to Belfast in 11h. Fly via British Airways, American Airlines, or Delta to get the fastest option. The distance between District of Columbia and Belfast is about 3390 mi. This flight may include one or multiple stops.

  • What are the most popular routes from District of Columbia to Belfast?

    Most travelers choose Washington, D.C. Dulles Intl - Belfast Intl, Washington, D.C. Dulles Intl - Belfast City or Washington, D.C. Reagan-National - Belfast Intl when deciding on the best route from District of Columbia to Belfast.

  • Can I find deals for flights from District of Columbia to Belfast that include hotel bookings?

    Yes. In addition to deals on District of Columbia to Belfast flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from District of Columbia to Belfast?

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

  • Can I find deals for business class flights from District of Columbia to Belfast?

    Yes. Cheapflights offers flight deals from District of Columbia 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

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

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