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Cheap flights from District of Columbia to Belfast from $337

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from District of Columbia to Belfast departing on 9/15. 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 District of Columbia to Belfast

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:30 pm - 4:20 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
14h 50m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
5:10 pm - 10:15 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
34h 05m3 stops Malaga London Gatwick Reykjavik Keflavik Intl
$790Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
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
8:30 pm - 4:20 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
14h 50m2 stops Reykjavik Keflavik Intl Glasgow Intl
Multiple Airlines Logo
10:30 am - 7:20 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
13h 50m2 stops Glasgow Intl Reykjavik Keflavik Intl
$844Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
Multiple Airlines Logo
8:30 pm - 11:20 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
21h 50m3 stops Reykjavik Keflavik Intl Dublin London Stansted
Multiple Airlines Logo
5:10 pm - 10:15 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
34h 05m3 stops Malaga London Gatwick Reykjavik Keflavik Intl
$871Multiple Airlines
Tue, Sep 22 - Tue, Sep 29
Multiple Airlines Logo
8:30 pm - 8:15 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
18h 45m2 stops Reykjavik Keflavik Intl London Gatwick
Multiple Airlines Logo
9:40 pm - 5:20 amBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
36h 40m3 stops Bristol Madrid Barajas Bogotá El Dorado
$872Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
Multiple Airlines Logo
8:30 pm - 8:15 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
18h 45m2 stops Reykjavik Keflavik Intl London Gatwick
Multiple Airlines Logo
8:15 pm - 2:15 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
47h 00m3 stops London Stansted Madrid Barajas Bogotá El Dorado
$889Multiple Airlines
Sun, Sep 6 - Sat, Sep 12
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
7:00 am - 3:10 pmBHD  Belfast City-IAD Washington, D.C. Dulles Intl
37h 10m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Toronto Island
$909Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
Multiple Airlines Logo
9:55 am - 11:55 amIAD  Washington, D.C. Dulles Intl-BHD Belfast City
21h 00m2 stops Toronto Pearson Intl Glasgow Intl
Multiple Airlines Logo
2:30 pm - 7:20 pmBHD  Belfast City-IAD Washington, D.C. Dulles Intl
33h 50m2 stops London Gatwick Reykjavik Keflavik Intl
$930Multiple Airlines
Sun, Sep 27 - Mon, Oct 12
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
7:00 am - 3:10 pmBHD  Belfast City-IAD Washington, D.C. Dulles Intl
37h 10m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Toronto Island
$933Multiple Airlines
Sun, Sep 6 - Sun, Sep 13
Multiple Airlines Logo
9:00 pm - 7:30 pmIAD  Washington, D.C. Dulles Intl-BFS Belfast Intl
17h 30m2 stops Casablanca Mohamed V Malaga
Multiple Airlines Logo
6:10 am - 4:38 pmBFS  Belfast Intl-IAD Washington, D.C. Dulles Intl
39h 28m3 stops London Gatwick Montreal Pierre Elliott Trudeau Intl Toronto Island
$948Multiple Airlines
Tue, Sep 1 - Mon, Sep 7

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British Airways flights from District of Columbia to Belfast

Our best British Airways deals on District of Columbia to Belfast flight tickets
British Airways
Nov 18
IAD9:55 pmWashington, D.C. Dulles Intl
11h 20m
1 stop
BHD2:15 pmBelfast City
Nov 23
BHD9:25 amBelfast City
11h 15m
1 stop
IAD3:40 pmWashington, D.C. Dulles Intl
$953
British Airways
Jan 10
IAD6:05 pmWashington, D.C. Dulles Intl
11h 15m
1 stop
BHD10:20 amBelfast City
Jan 14
BHD9:05 amBelfast City
11h 35m
1 stop
IAD3:40 pmWashington, D.C. Dulles Intl
$957
British Airways
Nov 18
DCA6:23 pmWashington, D.C. Reagan-National
14h 52m
2 stops
BHD2:15 pmBelfast City
Nov 23
BHD11:30 amBelfast City
17h 29m
2 stops
DCA11:59 pmWashington, D.C. Reagan-National
$967

KLM flights from District of Columbia to Belfast

Our best KLM deals on District of Columbia to Belfast flight tickets
KLM
Sep 6
IAD12:29 pmWashington, D.C. Dulles Intl
15h 51m
2 stops
BHD9:20 amBelfast City
Sep 13
BHD5:30 pmBelfast City
27h 05m
1 stop
IAD3:35 pmWashington, D.C. Dulles Intl
$1,111
KLM
Dec 22
IAD5:45 pmWashington, D.C. Dulles Intl
10h 25m
1 stop
BHD9:10 amBelfast City
Jan 19
BHD9:40 amBelfast City
18h 22m
2 stops
IAD11:02 pmWashington, D.C. Dulles Intl
$1,160

momondo Fare Finder

 
Customize 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, momondo users made 832,500 searches. Data last updated August 11, 2026.
Use the filters below to find and compare flights from District of Columbia to Belfast that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Tue 9/22

8:30 pm-4:20 pm

2 stops14h 50m

Belfast Intl

Tue 9/29

5:10 pm-10:15 pm

3 stops34h 05m

$790

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
Quickest round-trip

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Tue 9/22

8:30 pm-4:20 pm

2 stops14h 50m

Belfast Intl

Tue 9/29

10:30 am-7:20 pm

2 stops13h 50m

$844

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Tue 9/22

8:30 pm-11:20 pm

3 stops21h 50m

Belfast Intl

Tue 9/29

5:10 pm-10:15 pm

3 stops34h 05m

$871

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sun 9/6

8:30 pm-8:15 pm

2 stops18h 45m

Belfast Intl

Sun 9/13

9:40 pm-5:20 am

3 stops36h 40m

$872

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Sun 9/6

8:30 pm-8:15 pm

2 stops18h 45m

Belfast Intl

Sat 9/12

8:15 pm-2:15 pm

3 stops47h 00m

$889

Washington, D.C.Belfast

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

IADBHD

Washington, D.C. Dulles Intl

Sun 9/6

8:30 pm-8:30 pm

2 stops19h 00m

Belfast City

Sun 9/13

7:00 am-3:10 pm

3 stops37h 10m

$909

Washington, D.C.Belfast

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

IADBHD

Washington, D.C. Dulles Intl

Sun 9/27

9:55 am-11:55 am

2 stops21h 00m

Belfast City

Mon 10/12

2:30 pm-7:20 pm

2 stops33h 50m

$930

Washington, D.C.Belfast

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

IADBHD

Washington, D.C. Dulles Intl

Sun 9/6

8:30 pm-8:30 pm

2 stops19h 00m

Belfast City

Sun 9/13

7:00 am-3:10 pm

3 stops37h 10m

$933

Washington, D.C.Belfast

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

IADBFS

Washington, D.C. Dulles Intl

Tue 9/1

9:00 pm-7:30 pm

2 stops17h 30m

Belfast Intl

Mon 9/7

6:10 am-4:38 pm

3 stops39h 28m

$948

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 Belfast from

How to get the cheapest flight ticket from District of Columbia to Belfast

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 District of Columbia to Belfast?

Delta, KLM, and British Airways are the most popular carriers operating from District of Columbia to Belfast

Cheap District of Columbia to Belfast flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from District of Columbia to Belfast

Fastest flight time

11h 10m

Direct flights

None
The fastest flight from District of Columbia to Belfast takes 11h 10m
There are no direct flights from District of Columbia to Belfast. There are no popular flight routes from District of Columbia to Belfast.
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Frequently asked questions about flying from District of Columbia to Belfast

  • When did momondo last update prices for flights from District of Columbia to Belfast?

    Prices for flights from District of Columbia to Belfast are updated daily.

  • How old do you have to be to fly from District of Columbia to Belfast?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from District of Columbia to Belfast.

  • What documentation or ID do you need to fly to Belfast?

    The travel and health documents you'll need for your trip to Belfast 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 Belfast. 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 District of Columbia to Belfast?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from District of Columbia to Belfast. momondo saves you time and could save you money on your trip.

Can I find flights from District of Columbia to Belfast with flexible booking policies on momondo?

Yes. All flights to Belfast from District of Columbia on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from District of Columbia to Belfast?

momondo provides multiple filters to help you find the best flight to Belfast from District of Columbia. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from District of Columbia to Belfast right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of District of Columbia to Belfast 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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Find better results for your trip to the United Kingdom

Fly into one of these airports located in Belfast

Airports listed have a maximum distance of 12.2 mi from Belfast
Belfast Intl Airport
Belfast City Airport