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Cheap flights from Northern Ireland to Washington, D.C. from £443

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Northern Ireland to Washington, D.C. departing on 29/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags
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Find the cheapest flights from Northern Ireland to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
06:10 - 22:28
BFS
-
DCA
21h 18m
3 stops
Multiple Airlines Logo
12:45 - 19:15
DCA
-
BFS
25h 30m
3 stops
£784Multiple Airlines
Thu, 11 Jun - Wed, 17 Jun
American Airlines Logo
09:40 - 23:14
BHD
-
DCA
18h 34m
2 stops
American Airlines Logo
18:23 - 15:20
DCA
-
BHD
15h 57m
2 stops
£789American Airlines
Tue, 23 Jun - Tue, 11 Aug
American Airlines Logo
06:30 - 23:14
BHD
-
DCA
21h 44m
2 stops
American Airlines Logo
14:59 - 10:45
DCA
-
BHD
14h 46m
2 stops
£792American Airlines
Tue, 23 Jun - Tue, 11 Aug
Multiple Airlines Logo
06:10 - 08:53
BFS
-
DCA
31h 43m
3 stops
Multiple Airlines Logo
18:55 - 19:15
DCA
-
BFS
19h 20m
2 stops
£805Multiple Airlines
Thu, 11 Jun - Wed, 17 Jun
Multiple Airlines Logo
06:10 - 22:28
BFS
-
DCA
21h 18m
3 stops
Multiple Airlines Logo
18:55 - 19:15
DCA
-
BFS
19h 20m
2 stops
£806Multiple Airlines
Thu, 11 Jun - Wed, 17 Jun
Multiple Airlines Logo
06:10 - 08:53
BFS
-
DCA
31h 43m
3 stops
Multiple Airlines Logo
12:45 - 19:15
DCA
-
BFS
25h 30m
3 stops
£819Multiple Airlines
Thu, 11 Jun - Wed, 17 Jun
American Airlines Logo
13:45 - 23:14
BHD
-
DCA
14h 29m
2 stops
American Airlines Logo
17:35 - 10:45
DCA
-
BHD
12h 10m
2 stops
£837American Airlines
Tue, 23 Jun - Tue, 11 Aug
Multiple Airlines Logo
08:20 - 22:28
BFS
-
DCA
19h 08m
2 stops
Multiple Airlines Logo
18:55 - 19:15
DCA
-
BFS
19h 20m
2 stops
£848Multiple Airlines
Thu, 11 Jun - Wed, 17 Jun
American Airlines Logo
13:45 - 23:14
BHD
-
DCA
14h 29m
2 stops
American Airlines Logo
14:59 - 10:45
DCA
-
BHD
14h 46m
2 stops
£854American Airlines
Tue, 23 Jun - Tue, 11 Aug
British Airways Logo
11:00 - 22:15
BHD
-
DCA
16h 15m
2 stops
British Airways Logo
22:00 - 08:50
DCA
-
BHD
29h 50m
2 stops
£3,415British Airways
Sun, 13 Sep - Tue, 15 Sep

American Airlines flights from Northern Ireland to Washington, D.C. Reagan-National Airport

Our best American Airlines deals on Northern Ireland to Washington, D.C. Reagan-National Airport flight tickets
American Airlines
23 Jun
BHD09:40Belfast City
18h 34m
2 stops
DCA23:14Washington, D.C. Reagan-National
11 Aug
DCA18:23Washington, D.C. Reagan-National
15h 57m
2 stops
BHD15:20Belfast City
£789
American Airlines
23 Jun
BHD06:30Belfast City
21h 44m
2 stops
DCA23:14Washington, D.C. Reagan-National
11 Aug
DCA14:59Washington, D.C. Reagan-National
14h 46m
2 stops
BHD10:45Belfast City
£792
American Airlines
23 Jun
BHD13:45Belfast City
14h 29m
2 stops
DCA23:14Washington, D.C. Reagan-National
11 Aug
DCA17:35Washington, D.C. Reagan-National
12h 10m
2 stops
BHD10:45Belfast City
£837

British Airways flights from Northern Ireland to Washington, D.C. Reagan-National Airport

Our best British Airways deals on Northern Ireland to Washington, D.C. Reagan-National Airport flight tickets
British Airways
21 May
BHD12:45Belfast City
15h 28m
2 stops
DCA23:13Washington, D.C. Reagan-National
22 May
DCA10:14Washington, D.C. Reagan-National
17h 36m
2 stops
BHD08:50Belfast City
£2,978
British Airways
13 Sept
BHD11:00Belfast City
16h 15m
2 stops
DCA22:15Washington, D.C. Reagan-National
15 Sept
DCA22:00Washington, D.C. Reagan-National
29h 50m
2 stops
BHD08:50Belfast City
£3,415

momondo Fare Finder

 
Customise your flight search to find flights from Northern Ireland to Washington, D.C. Reagan-National Airport 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, momondo users made 279,928 searches. Data last updated 16 May 2026.
Use the filters below to find and compare flights from Northern Ireland to Washington, D.C. Reagan-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Thu 11/6

06:10-22:28

3 stops21h 18m

Washington, D.C. Reagan-National

Wed 17/6

12:45-19:15

3 stops25h 30m

£784

BelfastWashington, D.C.

BHD - DCA

BHDDCA

Belfast City

Tue 23/6

09:40-23:14

2 stops18h 34m

Washington, D.C. Reagan-National

Tue 11/8

18:23-15:20

2 stops15h 57m

£789

BelfastWashington, D.C.

BHD - DCA

BHDDCA

Belfast City

Tue 23/6

06:30-23:14

2 stops21h 44m

Washington, D.C. Reagan-National

Tue 11/8

14:59-10:45

2 stops14h 46m

£792

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Thu 11/6

06:10-08:53

3 stops31h 43m

Washington, D.C. Reagan-National

Wed 17/6

18:55-19:15

2 stops19h 20m

£805

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Thu 11/6

06:10-22:28

3 stops21h 18m

Washington, D.C. Reagan-National

Wed 17/6

18:55-19:15

2 stops19h 20m

£806

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Thu 11/6

06:10-08:53

3 stops31h 43m

Washington, D.C. Reagan-National

Wed 17/6

12:45-19:15

3 stops25h 30m

£819
Fastest return journey

BelfastWashington, D.C.

BHD - DCA

BHDDCA

Belfast City

Tue 23/6

13:45-23:14

2 stops14h 29m

Washington, D.C. Reagan-National

Tue 11/8

17:35-10:45

2 stops12h 10m

£837

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Thu 11/6

08:20-22:28

2 stops19h 08m

Washington, D.C. Reagan-National

Wed 17/6

18:55-19:15

2 stops19h 20m

£848

BelfastWashington, D.C.

BHD - DCA

BHDDCA

Belfast City

Tue 23/6

13:45-23:14

2 stops14h 29m

Washington, D.C. Reagan-National

Tue 11/8

14:59-10:45

2 stops14h 46m

£854

BelfastWashington, D.C.

BHD - DCA

BHDDCA

Belfast City

Sun 13/9

11:00-22:15

2 stops16h 15m

Washington, D.C. Reagan-National

Tue 15/9

22:00-08:50

2 stops29h 50m

£3,415

Flights are sorted by cheapest return flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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Cheap Northern Ireland to Washington, D.C. Reagan-National Airport flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Northern Ireland to Washington, D.C. Reagan-National Airport

Fastest flight time

15h 28m

Direct flights

None
The fastest flight from Northern Ireland to Washington, D.C. Reagan-National Airport takes 15h 28m
There are no direct flights from Northern Ireland to Washington, D.C. Reagan-National Airport. There are no popular flight routes from Northern Ireland to Washington, D.C. Reagan-National Airport.
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Frequently asked questions about flying from Northern Ireland to Washington, D.C. Reagan-National Airport

  • When did momondo last update prices for flights from Northern Ireland to Washington, D.C. Reagan-National Airport?

    Prices for flights from Northern Ireland to Washington, D.C. Reagan-National Airport were last updated today.

  • How old do you have to be to fly from Northern Ireland to Washington, D.C. Reagan-National Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Northern Ireland to Washington, D.C. Reagan-National Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Reagan-National Airport?

    The required travel and health documents for your Washington, D.C. Reagan-National Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Washington, D.C. Reagan-National Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Frequently asked questions about flying from Northern Ireland to Washington, D.C. Reagan-National Airport

  • How do I get Price Alerts for flights from Northern Ireland to Washington, D.C. Reagan-National Airport?

    Confirm your travel details to search for the latest offers for flights from Northern Ireland to Washington, D.C. Reagan-National Airport. While browsing offers there will be the option to toggle “Price Alerts”. You’ll then receive updates when prices for the flight route increase or decrease.

  • How can I save money on flights from Northern Ireland to Washington, D.C. Reagan-National Airport with momondo?

    Plan your trips smart with the “Price Forecast” feature, which uses flight data to help you pick the best days to fly for the lowest fares. Our “Price Calendar” helps you get the most for your money by showing you when it’s most advantageous to fly. Curate your own travel experiences for less with “Explore”. Expert travel hacks to fuel your next adventure are a click away with “Discover” by momondo. Set up our “Price Alerts” to track fare changes and book when prices are at their lowest point.

  • How does momondo find its flight prices?

    We aggregate our prices from over 700+ competitors from airlines to OTAs. We operate in over 30 markets worldwide to show you a wide range of travel options.

Travelling to a place near Washington, D.C.?

Book flights to Washington, D.C. if you plan to visit one of these locations
Alexandria
College Park
Springfield
Fairfax
Arlington
Gettysburg
Linthicum Heights
Glen Burnie
Laurel
Ellicott City
Lutherville Timonium
Cambridge
Westminster
Lexington Park
Woodbridge
Bethesda
Owings Mills
Silver Spring
Rockville
Landover

Why use momondo?

Why should I use momondo to find a flight deal from Northern Ireland to Washington, D.C.?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Northern Ireland to Washington, D.C. . Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Northern Ireland to Washington, D.C. with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Northern Ireland to Washington, D.C. flights to just show those with flexible booking policies.

How can momondo help me find flights from Northern Ireland to Washington, D.C.?

momondo helps you find the best flight between Northern Ireland and Washington, D.C. by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Northern Ireland to Washington, D.C. right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Washington, D.C. from Northern Ireland. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Washington, D.C. Reagan-National Airport trip

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