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Cheap flights from Belfast to Washington, D.C. from £354

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast to Washington, D.C. departing on 21/3. 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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Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
09:25 - 21:00
BFS
-
IAD
40h 35m3 stops
Multiple Airlines Logo
19:40 - 12:45
IAD
-
BFS
12h 05m2 stops
£513Multiple Airlines
Tue, 17 Feb - Tue, 24 Feb
Multiple Airlines Logo
07:55 - 15:15
BFS
-
IAD
36h 20m3 stops
Multiple Airlines Logo
19:40 - 22:50
IAD
-
BFS
22h 10m3 stops
£522Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb
Multiple Airlines Logo
07:55 - 18:30
BFS
-
IAD
15h 35m2 stops
Multiple Airlines Logo
19:40 - 16:10
IAD
-
BFS
15h 30m2 stops
£531Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb
British Airways Logo
08:45 - 15:35
BHD
-
IAD
11h 50m1 stop
British Airways Logo
13:08 - 10:30
IAD
-
BHD
16h 22m2 stops
£534British Airways
Fri, 30 Jan - Tue, 3 Feb
Multiple Airlines Logo
07:55 - 15:15
BFS
-
IAD
36h 20m3 stops
Multiple Airlines Logo
19:40 - 20:40
IAD
-
BFS
20h 00m2 stops
£541Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb
Delta Logo
17:20 - 19:09
BHD
-
IAD
30h 49m2 stops
Delta Logo
18:05 - 21:00
IAD
-
BHD
21h 55m1 stop
£542Delta
Tue, 17 Feb - Tue, 24 Feb
British Airways Logo
08:20 - 19:55
BHD
-
IAD
16h 35m2 stops
British Airways Logo
13:08 - 10:30
IAD
-
BHD
16h 22m2 stops
£555British Airways
Fri, 30 Jan - Tue, 3 Feb
American Airlines Logo
15:40 - 19:55
BHD
-
IAD
33h 15m1 stop
American Airlines Logo
17:26 - 13:55
IAD
-
BHD
39h 29m2 stops
£759American Airlines
Wed, 7 Jan - Sat, 10 Jan
Delta Logo
17:20 - 11:43
BHD
-
IAD
47h 23m2 stops
Delta Logo
19:49 - 16:50
IAD
-
BHD
40h 01m2 stops
£765Delta
Wed, 7 Jan - Sat, 10 Jan
American Airlines Logo
06:35 - 15:59
BHD
-
IAD
38h 24m2 stops
American Airlines Logo
11:34 - 11:10
IAD
-
BHD
18h 36m2 stops
£821American Airlines
Thu, 1 Jan - Sat, 10 Jan

British Airways flights from Belfast to Washington, D.C. Dulles Intl Airport

Our best British Airways deals on Belfast to Washington, D.C. Dulles Intl Airport flight tickets
British Airways
30 Jan
BHD08:45Belfast City
11h 50m
1 stop
IAD15:35Washington, D.C. Dulles Intl
3 Feb
IAD13:08Washington, D.C. Dulles Intl
16h 22m
2 stops
BHD10:30Belfast City
£534
Find similar
British Airways
30 Jan
BHD08:20Belfast City
16h 35m
2 stops
IAD19:55Washington, D.C. Dulles Intl
3 Feb
IAD13:08Washington, D.C. Dulles Intl
16h 22m
2 stops
BHD10:30Belfast City
£555
Find similar
British Airways
1 Jan
BHD06:35Belfast City
22h 29m
2 stops
IAD00:04Washington, D.C. Dulles Intl
7 Jan
IAD18:20Washington, D.C. Dulles Intl
15h 05m
2 stops
BHD14:25Belfast City
£1,005
Find similar

Delta flights from Belfast to Washington, D.C. Dulles Intl Airport

Our best Delta deals on Belfast to Washington, D.C. Dulles Intl Airport flight tickets
Delta
17 Feb
BHD17:20Belfast City
30h 49m
2 stops
IAD19:09Washington, D.C. Dulles Intl
24 Feb
IAD18:05Washington, D.C. Dulles Intl
21h 55m
1 stop
BHD21:00Belfast City
£542
Find similar
Delta
7 Jan
BHD17:20Belfast City
47h 23m
2 stops
IAD11:43Washington, D.C. Dulles Intl
10 Jan
IAD19:49Washington, D.C. Dulles Intl
40h 01m
2 stops
BHD16:50Belfast City
£765
Find similar
Delta
1 Jan
BHD06:30Belfast City
14h 35m
1 stop
IAD16:05Washington, D.C. Dulles Intl
9 Jan
IAD12:23Washington, D.C. Dulles Intl
23h 27m
2 stops
BHD16:50Belfast City
£915
Find similar

momondo Fare Finder

 
Customise your flight search to find flights from Belfast to Washington, D.C. Dulles Intl 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 21 December 2025.
Use the filters below to find and compare flights from Belfast to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Tue 17/2

09:25-21:00

3 stops40h 35m

Washington, D.C. Dulles Intl

Tue 24/2

19:40-12:45

2 stops12h 05m

£513

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 4/2

07:55-15:15

3 stops36h 20m

Washington, D.C. Dulles Intl

Wed 11/2

19:40-22:50

3 stops22h 10m

£522

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 4/2

07:55-18:30

2 stops15h 35m

Washington, D.C. Dulles Intl

Wed 11/2

19:40-16:10

2 stops15h 30m

£531

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Fri 30/1

08:45-15:35

1 stop11h 50m

Washington, D.C. Dulles Intl

Tue 3/2

13:08-10:30

2 stops16h 22m

£534

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 4/2

07:55-15:15

3 stops36h 20m

Washington, D.C. Dulles Intl

Wed 11/2

19:40-20:40

2 stops20h 00m

£541

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 17/2

17:20-19:09

2 stops30h 49m

Washington, D.C. Dulles Intl

Tue 24/2

18:05-21:00

1 stop21h 55m

£542

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Fri 30/1

08:20-19:55

2 stops16h 35m

Washington, D.C. Dulles Intl

Tue 3/2

13:08-10:30

2 stops16h 22m

£555

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 7/1

15:40-19:55

1 stop33h 15m

Washington, D.C. Dulles Intl

Sat 10/1

17:26-13:55

2 stops39h 29m

£759

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 7/1

17:20-11:43

2 stops47h 23m

Washington, D.C. Dulles Intl

Sat 10/1

19:49-16:50

2 stops40h 01m

£765

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 1/1

06:35-15:59

2 stops38h 24m

Washington, D.C. Dulles Intl

Sat 10/1

11:34-11:10

2 stops18h 36m

£821

Flights are sorted by cheapest return flights first.

Showing 1-10 of 15 resultsSorted by cheapest first
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See travel insights to Washington, D.C. from

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

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 time of day to depart on your flight to Washington, D.C. Dulles Intl Airport?

The cheapest time of day to fly to Washington, D.C. Dulles Intl Airport is at midday when flights can be purchased for as low as £713. In contrast, the most expensive time of day to depart to Washington, D.C. Dulles Intl Airport is in the morning when prices are around £799.

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

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

Fastest flight time

11h 50m

Direct flights

None
The fastest flight from Belfast to Washington, D.C. Dulles Intl Airport takes 11h 50m
There are no direct flights from Belfast to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from Belfast to Washington, D.C. Dulles Intl Airport.
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  • How far is Belfast to Washington, D.C. Dulles Intl by plane?

    A flight from Belfast to Washington, D.C. Dulles Intl will travel around 3387.7 mi. By plane, this route typically takes 11h 50m.

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

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

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

    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 Belfast to Washington, D.C. Dulles Intl Airport.

  • What documentation or ID do you need to fly to Washington, D.C. Dulles Intl Airport?

    The travel and health documents you'll need for your trip to Washington, D.C. Dulles Intl Airport 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 Washington, D.C. Dulles Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Laurel
College Park
Alexandria
Fairfax
Arlington
Linthicum Heights
Bethesda
Glen Burnie
Lutherville Timonium
Front Royal
Winchester
Ellicott City
Cambridge
Westminster
Woodbridge
Ashburn
Sterling
Silver Spring
Owings Mills
National Harbor

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Belfast to Washington, D.C. for you.

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

All flight searches from Belfast to Washington, D.C. on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Belfast to Washington, D.C. flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

If you are not ready to book a flight from Belfast to Washington, D.C. now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Washington, D.C. and let you know when they change.

An easier way to manage your Washington, D.C. Dulles Intl Airport trip

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