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Cheap flights from Washington, D.C. to Northern Ireland from £250

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 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BFS
10 Sep — 17 Sep1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington, D.C. to Northern Ireland

Enter your travel dates to find the best prices.

Cheapest flights from Washington, D.C. to Northern Ireland
Explore the most affordable flight options available from Washington, D.C. to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 August 2026.

Tue 22/920:30 -
2 stops18h 10m
Tue 29/917:10 -
3 stops34h 05m
Deal found 11/8£575
Sun 27/923:20 -
2 stops16h 40m
Mon 12/1015:35 -
2 stops32h 45m
Deal found 6/8£607
Sun 6/920:30 -
2 stops18h 45m
Sun 13/921:40 -
3 stops36h 40m
Deal found 7/8£646
Mon 21/920:30 -
2 stops19h 10m
Mon 28/917:15 -
3 stops34h 00m
Deal found 7/8£654
Sun 6/920:30 -
2 stops18h 45m
Sat 12/920:15 -
3 stops47h 00m
Deal found 7/8£658
Tue 22/920:30 -
2 stops18h 10m
Tue 29/910:30 -
2 stops16h 45m
Deal found 8/8£668
Sun 6/920:30 -
2 stops19h 00m
Sun 13/907:00 -
3 stops37h 10m
Deal found 7/8£673
Thu 24/923:20 -
2 stops17h 25m
Thu 1/1006:10 -
2 stops21h 05m
Deal found 10/8£692
Tue 1/921:00 -
2 stops17h 30m
Mon 7/906:10 -
3 stops39h 28m
Deal found 6/8£702
Sun 27/917:40 -
1 stop10h 40m
Mon 12/1017:30 -
1 stop27h 05m
Deal found 6/8£704
Sun 27/909:40 -
3 stops31h 15m
Mon 12/1006:10 -
3 stops34h 50m
Deal found 6/8£705
Wed 18/1121:55 -
1 stop11h 20m
Mon 23/1109:25 -
1 stop11h 15m
Deal found 9/8£706

Find flight deals from Washington, D.C. to Northern Ireland

Keep the following information in mind while searching for Washington, D.C. to Northern Ireland flight deals. Data was last updated 11 August 2026.

Round-trip from

£575

One-way from

£250
22/9-29/9
  • 22/9-29/9
  • 5 total stops
  • 52h 15m total
  • Washington, D.C. to Northern Ireland
Search Deals
15/9
  • 15/9
  • 2 total stops
  • 34h 50m total
  • Washington, D.C. to Northern Ireland
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Washington, D.C. to Northern Ireland 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 11 August 2026.
Use the filters below to find and compare flights from Washington, D.C. to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Tue 22/9

20:30-19:40

2 stops18h 10m

Belfast Intl

Tue 29/9

17:10-22:15

3 stops34h 05m

£575

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Sun 27/9

23:20-21:00

2 stops16h 40m

Belfast Intl

Mon 12/10

15:35-19:20

2 stops32h 45m

£607

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Sun 6/9

20:30-20:15

2 stops18h 45m

Belfast Intl

Sun 13/9

21:40-05:20

3 stops36h 40m

£646

BaltimoreBelfast

BWI Baltimore/Washington - BFS Belfast Intl

BWIBFS

Baltimore/Washington

Mon 21/9

20:30-20:40

2 stops19h 10m

Belfast Intl

Mon 28/9

17:15-22:15

3 stops34h 00m

£654

BaltimoreBelfast

BWI Baltimore/Washington - BFS Belfast Intl

BWIBFS

Baltimore/Washington

Tue 22/9

20:30-19:40

2 stops18h 10m

Belfast Intl

Tue 29/9

10:30-22:15

2 stops16h 45m

£668

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BFS Belfast Intl

IADBFS

Washington, D.C. Dulles Intl

Tue 1/9

21:00-19:30

2 stops17h 30m

Belfast Intl

Mon 7/9

06:10-16:38

3 stops39h 28m

£702

Washington, D.C.Belfast

IAD Washington, D.C. Dulles Intl - BHD Belfast City

IADBHD

Washington, D.C. Dulles Intl

Sun 27/9

17:40-09:20

1 stop10h 40m

Belfast City

Mon 12/10

17:30-15:35

1 stop27h 05m

£704

Washington, D.C.Belfast

DCA Washington, D.C. Reagan-National - BFS Belfast Intl

DCABFS

Washington, D.C. Reagan-National

Sun 27/9

09:40-21:55

3 stops31h 15m

Belfast Intl

Mon 12/10

06:10-12:00

3 stops34h 50m

£705

Washington, D.C.Belfast

DCA Washington, D.C. Reagan-National - BFS Belfast Intl

DCABFS

Washington, D.C. Reagan-National

Sun 6/9

06:59-18:50

2 stops30h 51m

Belfast Intl

Sat 12/9

06:20-21:50

3 stops20h 30m

£710

Washington, D.C.Belfast

DCA Washington, D.C. Reagan-National - BHD Belfast City

DCABHD

Washington, D.C. Reagan-National

Wed 18/11

18:23-14:15

2 stops14h 52m

Belfast City

Mon 23/11

11:30-23:59

2 stops17h 29m

£716

Flights are sorted by cheapest return flights first.

Deals found on 7/8

Showing 1-10 of 55 resultsSorted by cheapest first
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Best time to book a flight from Washington, D.C. to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland 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 Northern Ireland

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 Northern Ireland. 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 Northern Ireland?

    Departing from Washington, D.C. to Northern Ireland will take you 10h 40m. The distance between Washington, D.C. and Northern Ireland is about 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 Northern Ireland?

    While some choose either Baltimore/Washington - Belfast City or Washington, D.C. Reagan-National - Belfast Intl, Baltimore/Washington - Belfast Intl is the most popular route from Washington, D.C. to Northern Ireland.

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

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

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

    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 Northern Ireland.

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

    Yes. Cheapflights offers flight deals from Washington, D.C. to Northern Ireland 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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How does Cheapflights help users find flights from Washington, D.C. to Northern Ireland?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington, D.C. to Northern Ireland. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Northern Ireland?

Millions of users choose and trust Cheapflights to book the best flight deals from Washington, D.C. to Northern Ireland for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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

Yes, we can. To see specific flights from Washington, D.C. to Northern Ireland 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 Washington, D.C. to Northern Ireland become cheaper?

Of course! You can now track prices for flights from Washington, D.C. to Northern Ireland and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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