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Cheap flights from Belfast to Washington, D.C. from £515

This is the cheapest return 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 1/10. 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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Find the cheapest flights from Belfast to Washington, D.C.

Cheap return flights

Logo
07:25 - 15:20BFS-IAD
36h 55m3 stops
Logo
17:50 - 22:00IAD-BFS
23h 10m3 stops
£515
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Wed, 1 Oct - Wed, 8 Oct
Logo
07:15 - 22:10BFS-IAD
19h 55m2 stops
Logo
20:30 - 15:30IAD-BFS
14h 00m2 stops
£525
Find Deal
Wed, 1 Oct - Wed, 8 Oct
Logo
07:15 - 19:59BFS-IAD
17h 44m3 stops
Logo
22:05 - 21:05IAD-BFS
18h 00m2 stops
£579
Find Deal
Wed, 1 Oct - Wed, 8 Oct
American Airlines Logo
06:35 - 15:35BHD-IAD
14h 00m1 stop
American Airlines Logo
16:34 - 14:15IAD-BHD
16h 41m2 stops
£586American Airlines
Find Deal
Thu, 20 Nov - Mon, 24 Nov
American Airlines Logo
11:05 - 15:35BHD-IAD
33h 30m1 stop
American Airlines Logo
18:20 - 10:40IAD-BHD
11h 20m1 stop
£587American Airlines
Find Deal
Thu, 20 Nov - Mon, 24 Nov
Aer Lingus Logo
16:50 - 15:55BHD-IAD
28h 05m1 stop
Aer Lingus Logo
17:20 - 12:50IAD-BHD
14h 30m2 stops
£3,079Aer Lingus
Find Deal
Wed, 15 Oct - Tue, 21 Oct
Aer Lingus Logo
17:55 - 15:50BHD-IAD
26h 55m2 stops
Aer Lingus Logo
17:20 - 12:50IAD-BHD
14h 30m2 stops
£3,433Aer Lingus
Find Deal
Wed, 15 Oct - Tue, 21 Oct
KLM Logo
06:30 - 16:20BHD-IAD
14h 50m2 stops
KLM Logo
17:25 - 16:55IAD-BHD
18h 30m1 stop
£3,698KLM
Find Deal
Thu, 16 Oct - Mon, 20 Oct
KLM Logo
06:30 - 16:20BHD-IAD
14h 50m2 stops
KLM Logo
21:20 - 16:55IAD-BHD
14h 35m2 stops
£3,716KLM
Find Deal
Thu, 16 Oct - Mon, 20 Oct
Virgin Atlantic Logo
06:30 - 15:35BHD-IAD
14h 05m1 stop
Virgin Atlantic Logo
17:25 - 21:15IAD-BHD
22h 50m1 stop
£3,764Virgin Atlantic
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Fri, 26 Sep - Sat, 4 Oct

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

Our best American Airlines deals on Belfast to Washington, D.C. Dulles Intl Airport flight tickets
American Airlines
20 Nov
BHD06:35Belfast City
14h 00m
1 stop
IAD15:35Washington, D.C. Dulles Intl
24 Nov
IAD16:34Washington, D.C. Dulles Intl
16h 41m
2 stops
BHD14:15Belfast City
£586
Find similar
American Airlines
20 Nov
BHD11:05Belfast City
33h 30m
1 stop
IAD15:35Washington, D.C. Dulles Intl
24 Nov
IAD18:20Washington, D.C. Dulles Intl
11h 20m
1 stop
BHD10:40Belfast City
£587
Find similar
American Airlines
20 Nov
BHD06:35Belfast City
17h 46m
2 stops
IAD19:21Washington, D.C. Dulles Intl
24 Nov
IAD13:58Washington, D.C. Dulles Intl
15h 42m
2 stops
BHD10:40Belfast City
£591
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Aer Lingus flights from Belfast to Washington, D.C. Dulles Intl Airport

Our best Aer Lingus deals on Belfast to Washington, D.C. Dulles Intl Airport flight tickets
Aer Lingus
20 Aug
BHD17:55Belfast City
26h 55m
2 stops
IAD15:50Washington, D.C. Dulles Intl
27 Aug
IAD21:00Washington, D.C. Dulles Intl
18h 55m
2 stops
BHD20:55Belfast City
£1,285
Find similar
Aer Lingus
15 Oct
BHD16:50Belfast City
28h 05m
1 stop
IAD15:55Washington, D.C. Dulles Intl
21 Oct
IAD17:20Washington, D.C. Dulles Intl
14h 30m
2 stops
BHD12:50Belfast City
£3,079
Find similar
Aer Lingus
15 Oct
BHD17:55Belfast City
26h 55m
2 stops
IAD15:50Washington, D.C. Dulles Intl
21 Oct
IAD17:20Washington, D.C. Dulles Intl
14h 30m
2 stops
BHD12:50Belfast City
£3,433
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 19 August 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

Wed 1/10

07:25-15:20

3 stops36h 55m

Washington, D.C. Dulles Intl

Wed 8/10

17:50-22:00

3 stops23h 10m

£515

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 1/10

07:15-22:10

2 stops19h 55m

Washington, D.C. Dulles Intl

Wed 8/10

20:30-15:30

2 stops14h 00m

£525

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Wed 1/10

07:15-19:59

3 stops17h 44m

Washington, D.C. Dulles Intl

Wed 8/10

22:05-21:05

2 stops18h 00m

£579

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 20/11

06:35-15:35

1 stop14h 00m

Washington, D.C. Dulles Intl

Mon 24/11

16:34-14:15

2 stops16h 41m

£586

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 20/11

11:05-15:35

1 stop33h 30m

Washington, D.C. Dulles Intl

Mon 24/11

18:20-10:40

1 stop11h 20m

£587

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 15/10

16:50-15:55

1 stop28h 05m

Washington, D.C. Dulles Intl

Tue 21/10

17:20-12:50

2 stops14h 30m

£3,079

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 15/10

17:55-15:50

2 stops26h 55m

Washington, D.C. Dulles Intl

Tue 21/10

17:20-12:50

2 stops14h 30m

£3,433

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 16/10

06:30-16:20

2 stops14h 50m

Washington, D.C. Dulles Intl

Mon 20/10

17:25-16:55

1 stop18h 30m

£3,698

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 16/10

06:30-16:20

2 stops14h 50m

Washington, D.C. Dulles Intl

Mon 20/10

21:20-16:55

2 stops14h 35m

£3,716

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Fri 26/9

06:30-15:35

1 stop14h 05m

Washington, D.C. Dulles Intl

Sat 4/10

17:25-21:15

1 stop22h 50m

£3,764

Flights are sorted by cheapest return flights first.

Showing 1-10 of 11 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 £705. 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 £790.

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

Best price found

£1,267

Fastest flight time

11h 00m

Direct flights

None
The best one-way flight to Washington, D.C. Dulles Intl Airport from Belfast in the past 72 hours is £1,267. The best return flight deal from Belfast to Washington, D.C. Dulles Intl Airport found on momondo in the last 72 hours is £515.
The fastest flight from Belfast to Washington, D.C. Dulles Intl Airport takes 11h 00m
There are no direct flights from Belfast to Washington, D.C. Dulles Intl Airport. Popular non-direct routes for this connection are Belfast Intl Airport - Washington, D.C. Dulles Intl Airport and Belfast City Airport - 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 00m.

  • 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 many operators does momondo search for flights from Belfast to Washington, D.C. Dulles Intl Airport?

  • 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.

Best airlines flying from Belfast to Washington, D.C. Dulles Intl Airport

Compare and see reviews for airlines that fly from Belfast to Washington, D.C. Dulles Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
British AirwaysPriceFrom £606Free CancellationRating
6.7
7,283 reviews
Search British Airways flights

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

Book flights to Washington, D.C. if you plan to visit one of these locations
Winchester
Laurel
Essex
Alexandria
Fairfax
Manassas
Bethesda
Oxon Hill
Chantilly
College Park
Linthicum Heights
Gettysburg
Front Royal
Hanover
Cambridge
Ellicott City
Westminster
Arlington
Ashburn
Woodbridge

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.

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