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Cheap flights from Washington, D.C. Dulles Intl Airport to Northern Ireland from $285

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to Northern Ireland departing on 10/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to Northern Ireland

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
7:15 pm - 12:00 pmIAD  Washington, D.C. Dulles Intl-BHD Belfast City
11h 45m1 stop London Heathrow
British Airways Logo
9:40 am - 8:20 pmBHD  Belfast City-IAD Washington, D.C. Dulles Intl
15h 40m1 stop London Heathrow
$759British Airways
Wed, Oct 7 - Mon, Oct 12
Multiple Airlines Logo
11:20 pm - 4:20 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
12h 00m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
8:15 pm - 3:10 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
47h 55m3 stops London Luton Madrid Barajas Lisbon Humberto Delgado
$770Multiple Airlines
Tue, Sep 1 - Mon, Sep 7
Multiple Airlines Logo
8:30 pm - 11:25 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
21h 55m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
6:45 am - 3:45 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
38h 00m3 stops Malaga Casablanca Mohamed V Riyadh King Khaled Intl
$772Multiple Airlines
Sat, Sep 19 - Sat, Sep 26
Multiple Airlines Logo
8:30 pm - 9:25 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
19h 55m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
10:25 am - 5:20 amBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
47h 55m3 stops Liverpool J. Lennon Madrid Barajas Bogotá El Dorado
$786Multiple Airlines
Sat, Oct 17 - Thu, Oct 22
Multiple Airlines Logo
8:30 pm - 9:25 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
19h 55m2 stops Reykjavik Keflavik Intl Manchester
Multiple Airlines Logo
9:10 pm - 7:00 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
26h 50m2 stops Alicante Casablanca Mohamed V
$794Multiple Airlines
Sat, Oct 17 - Thu, Oct 22
Multiple Airlines Logo
8:30 pm - 11:25 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
21h 55m3 stops Reykjavik Keflavik Intl Kastrup Copenhagen Manchester
Multiple Airlines Logo
10:25 am - 5:20 amBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
47h 55m3 stops Liverpool J. Lennon Madrid Barajas Bogotá El Dorado
$796Multiple Airlines
Sat, Oct 17 - Thu, Oct 22
Multiple Airlines Logo
8:30 pm - 8:30 pmIAD  Washington, D.C. Dulles Intl-BHD Belfast City
19h 00m2 stops Reykjavik Keflavik Intl London Gatwick
Multiple Airlines Logo
8:05 am - 7:00 pmBHD  Belfast City-IAD Washington, D.C. Dulles Intl
39h 55m3 stops London Luton Madrid Barajas Casablanca Mohamed V
$805Multiple Airlines
Mon, Sep 21 - Tue, Oct 6
Multiple Airlines Logo
11:20 pm - 9:00 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
16h 40m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
8:15 pm - 3:10 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
47h 55m3 stops London Luton Madrid Barajas Lisbon Humberto Delgado
$816Multiple Airlines
Sun, Sep 27 - Mon, Oct 12
Multiple Airlines Logo
11:20 pm - 9:00 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
16h 40m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
3:35 pm - 7:20 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
32h 45m2 stops London Stansted Reykjavik Keflavik Intl
$820Multiple Airlines
Sun, Sep 27 - Mon, Oct 12
Multiple Airlines Logo
11:20 pm - 9:00 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
16h 40m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
3:35 pm - 7:20 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
32h 45m2 stops London Stansted Reykjavik Keflavik Intl
$822Multiple Airlines
Sun, Sep 27 - Mon, Oct 12

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KLM flights from Washington, D.C. Dulles Intl Airport to Northern Ireland

Our best KLM deals on Washington, D.C. Dulles Intl Airport to Northern Ireland flight tickets
KLM
Jan 27
IAD11:05 amWashington, D.C. Dulles Intl
17h 05m
2 stops
BHD9:10 amBelfast City
Feb 2
BHD9:40 amBelfast City
18h 22m
2 stops
IAD11:02 pmWashington, D.C. Dulles Intl
$1,019
KLM
Sep 21
IAD12:25 pmWashington, D.C. Dulles Intl
15h 55m
2 stops
BHD9:20 amBelfast City
Oct 6
BHD9:50 amBelfast City
18h 26m
2 stops
IAD11:16 pmWashington, D.C. Dulles Intl
$1,020
KLM
Jan 29
IAD7:50 pmWashington, D.C. Dulles Intl
16h 00m
2 stops
BHD4:50 pmBelfast City
Feb 2
BHD9:40 amBelfast City
19h 40m
2 stops
IAD12:20 amWashington, D.C. Dulles Intl
$1,069

American Airlines flights from Washington, D.C. Dulles Intl Airport to Northern Ireland

Our best American Airlines deals on Washington, D.C. Dulles Intl Airport to Northern Ireland flight tickets
American Airlines
Jan 28
IAD5:46 pmWashington, D.C. Dulles Intl
14h 04m
2 stops
BHD12:50 pmBelfast City
Feb 2
BHD8:45 amBelfast City
16h 10m
1 stop
IAD7:55 pmWashington, D.C. Dulles Intl
$1,039
American Airlines
Jan 28
IAD5:46 pmWashington, D.C. Dulles Intl
14h 04m
2 stops
BHD12:50 pmBelfast City
Feb 2
BHD8:45 amBelfast City
19h 27m
2 stops
IAD11:12 pmWashington, D.C. Dulles Intl
$1,049

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport 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, momondo users made 832,500 searches. Data last updated August 6, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

Washington, D.C.Belfast

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

IADBHD

Washington, D.C. Dulles Intl

Wed 10/7

7:15 pm-12:00 pm

1 stop11h 45m

Belfast City

Mon 10/12

9:40 am-8:20 pm

1 stop15h 40m

$759

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Tue 9/1

11:20 pm-4:20 pm

2 stops12h 00m

Belfast Intl

Mon 9/7

8:15 pm-3:10 pm

3 stops47h 55m

$770

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sat 9/19

8:30 pm-11:25 pm

2 stops21h 55m

Belfast Intl

Sat 9/26

6:45 am-3:45 pm

3 stops38h 00m

$772

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sat 10/17

8:30 pm-9:25 pm

2 stops19h 55m

Belfast Intl

Thu 10/22

10:25 am-5:20 am

3 stops47h 55m

$786

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sat 10/17

8:30 pm-9:25 pm

2 stops19h 55m

Belfast Intl

Thu 10/22

9:10 pm-7:00 pm

2 stops26h 50m

$794

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sat 10/17

8:30 pm-11:25 pm

3 stops21h 55m

Belfast Intl

Thu 10/22

10:25 am-5:20 am

3 stops47h 55m

$796

Washington, D.C.Belfast

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

IADBHD

Washington, D.C. Dulles Intl

Mon 9/21

8:30 pm-8:30 pm

2 stops19h 00m

Belfast City

Tue 10/6

8:05 am-7:00 pm

3 stops39h 55m

$805

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sun 9/27

11:20 pm-9:00 pm

2 stops16h 40m

Belfast Intl

Mon 10/12

8:15 pm-3:10 pm

3 stops47h 55m

$816

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sun 9/27

11:20 pm-9:00 pm

2 stops16h 40m

Belfast Intl

Mon 10/12

3:35 pm-7:20 pm

2 stops32h 45m

$820

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sun 9/27

11:20 pm-9:00 pm

2 stops16h 40m

Belfast Intl

Mon 10/12

3:35 pm-7:20 pm

2 stops32h 45m

$822

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Northern Ireland from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to Northern Ireland

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to Northern Ireland?

KLM and Air France are the most popular carriers operating from Washington, D.C. Dulles Intl to Northern Ireland

Cheap Washington, D.C. Dulles Intl Airport to Northern Ireland flight deals and tips

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

Fastest flight time

11h 10m

Direct flights

None
The fastest flight from Washington, D.C. Dulles Intl Airport to Northern Ireland takes 11h 10m
There are no direct flights from Washington, D.C. Dulles Intl Airport to Northern Ireland. There are no popular flight routes from Washington, D.C. Dulles Intl Airport to Northern Ireland.
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Frequently asked questions about flying from Washington, D.C. Dulles Intl Airport to Northern Ireland

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

    Prices for flights from Washington, D.C. Dulles Intl Airport to Northern Ireland are updated daily.

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to Northern Ireland?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to Northern Ireland.

  • What documentation or ID do you need to fly to Northern Ireland?

    The travel and health documents you'll need for your trip to Northern Ireland may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Northern Ireland. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Why use momondo?

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

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

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

Flights from Washington, D.C. to Northern Ireland with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

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

momondo provides multiple filters to help you find the best flight to Northern Ireland from Washington, D.C.. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

Of course. momondo tracks the price of Washington, D.C. to Northern Ireland flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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