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Cheap flights from Belfast Intl Airport to Washington, D.C. from £503

This is the cheapest return flight price found by a momondo user in the last 72 hours by searching for a flight from Belfast Intl Airport to Washington, D.C. departing on 5/3. 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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Find the cheapest flights from Belfast Intl Airport to Washington, D.C.

Cheap return flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
08:50 - 19:55
BFS
-
IAD
16h 05m1 stop
Multiple Airlines Logo
19:20 - 20:20
IAD
-
BFS
21h 00m1 stop
£503Multiple Airlines
Thu, 5 Mar - Thu, 12 Mar
Multiple Airlines Logo
07:55 - 15:15
BFS
-
IAD
36h 20m3 stops
Multiple Airlines Logo
19:40 - 22:50
IAD
-
BFS
22h 10m3 stops
£520Multiple 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
£529Multiple Airlines
Wed, 4 Feb - Wed, 11 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
£539Multiple Airlines
Wed, 4 Feb - Wed, 11 Feb

momondo Fare Finder

 
Customise your flight search to find flights from Belfast Intl Airport 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 23 December 2025.
Use the filters below to find and compare flights from Belfast Intl Airport 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

Thu 5/3

08:50-19:55

1 stop16h 05m

Washington, D.C. Dulles Intl

Thu 12/3

19:20-20:20

1 stop21h 00m

£503

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

£520

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

£529

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

£539

Flights are sorted by cheapest return flights first.

Sorted by cheapest first

See travel insights to Washington, D.C. from

How to get the cheapest flight ticket from Belfast Intl Airport 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 £711. 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 £796.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Belfast Intl Airport to Washington, D.C. Dulles Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Belfast Intl Airport to Washington, D.C. Dulles Intl Airport (BFS to IAD) flight deals and tips

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

Fastest flight time

11h 30m

Direct flights

None
The fastest flight from Belfast Intl Airport to Washington, D.C. Dulles Intl Airport takes 11h 30m
There are no direct flights from Belfast Intl Airport to Washington, D.C. Dulles Intl Airport. There are no popular flight routes from Belfast Intl Airport to Washington, D.C. Dulles Intl Airport.
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  • How far is Belfast Intl to Washington, D.C. Dulles Intl by plane?

    The straight-line distance from Belfast Intl to Washington, D.C. Dulles Intl is 3375.6 mi. A reasonable flight in good conditions will take 11h 30m.

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

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Belfast Intl Airport 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 required for your trip to Washington, D.C. Dulles Intl Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Washington, D.C. Dulles Intl Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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.?

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

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

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

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

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as help filter your options to help you make an informed choice when booking flights to Washington, D.C. from Belfast.

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

Yes. momondo can track prices for Belfast to Washington, D.C. flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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