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Cheap flights from Belfast to Washington, D.C. Dulles Intl Airport from £329

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 13/3. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — IAD
27 פב​​​​​​​' — 6 מרץ1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast to Dulles Intl

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to Dulles Intl
Explore the most affordable flight options available from Belfast to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 28 ינואר 2026.

ה' 12/314:25
BFS
-
IAD
2 stops31h 15m
Multiple Airlines
ה' 19/321:30
IAD
-
BFS
2 stops20h 50m
Multiple Airlines
Deal found 26/1£507
ב' 23/211:30
BHD
-
IAD
1 stop13h 25m
British Airways
א' 1/318:20
IAD
-
BHD
1 stop11h 00m
British Airways
Deal found 25/1£529
ה' 5/306:35
BHD
-
IAD
1 stop14h 00m
British Airways
ב' 9/322:45
IAD
-
BHD
1 stop11h 30m
British Airways
Deal found 25/1£531
ב' 23/206:30
BHD
-
IAD
1 stop14h 35m
Delta
א' 1/312:24
IAD
-
BHD
2 stops23h 26m
Delta
Deal found 25/1£534
ה' 5/218:50
BHD
-
IAD
2 stops25h 45m
British Airways
ב' 9/213:08
IAD
-
BHD
2 stops20h 07m
British Airways
Deal found 25/1£567
ג' 10/207:20
BHD
-
IAD
2 stops16h 10m
Multiple Airlines
ש' 14/219:40
IAD
-
BHD
2 stops20h 10m
Multiple Airlines
Deal found 25/1£665
ב' 23/217:20
BHD
-
IAD
3 stops26h 15m
Multiple Airlines
א' 1/320:30
IAD
-
BHD
2 stops19h 20m
Multiple Airlines
Deal found 25/1£821

Find flight deals from Belfast to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 28 ינואר 2026.

Round-trip from

£507

One-way from

£329
12/3-19/3
  • 12/3-19/3
  • 4 total stops
  • 52h 05m total
  • Belfast to Washington, D.C.
Search Deals
13/3
  • 13/3
  • 3 total stops
  • 46h 01m total
  • Belfast to Washington, D.C.
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast to Dulles Intl 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, Cheapflights users made 858,174 searches. Data last updated 28 ינואר 2026.
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

Belfast

Fly to

Dulles Intl

Route

Depart

Return

Price

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

ה' 12/3

14:25-17:40

2 stops31h 15m

Washington, D.C. Dulles Intl

ה' 19/3

21:30-22:20

2 stops20h 50m

£507

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

ב' 23/2

11:30-19:55

1 stop13h 25m

Washington, D.C. Dulles Intl

א' 1/3

18:20-10:20

1 stop11h 00m

£529

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

ה' 5/3

11:05-19:55

1 stop13h 50m

Washington, D.C. Dulles Intl

ב' 9/3

19:20-10:40

1 stop11h 20m

£531

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

ב' 23/2

06:30-16:05

1 stop14h 35m

Washington, D.C. Dulles Intl

א' 1/3

12:24-16:50

2 stops23h 26m

£534

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

ו' 13/3

06:30-00:31

3 stops46h 01m

£329

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

ג' 10/2

06:55-18:45

3 stops40h 50m

£432

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

ג' 7/7

17:20-15:05

3 stops26h 45m

£492

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

ג' 7/7

09:50-19:35

2 stops14h 45m

£523

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

ג' 7/7

09:40-17:25

1 stop12h 45m

£561

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

ג' 10/2

11:25-19:55

1 stop13h 30m

£1,198

Flights are sorted by cheapest return flights first.

Deals found on 27/1

Best time to book a flight from Belfast to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Belfast with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Belfast to Washington, D.C. Dulles Intl Airport
No data available for this route at this time. Please check back soon.

Related info for your journey

Find useful and relevant information for your journey from Belfast to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Belfast to Washington, D.C. Dulles Intl Airport?

    Airlines like British Airways and Delta fly from Belfast to Washington, D.C. Dulles Intl Airport in about 13h 25m. The time it takes to get you to your destination can typically vary by up to 1h 10m. Airlines will cover a distance of 3390 mi. This flight may include one or multiple stops.

  • Can I find deals for flights from Belfast to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on Belfast to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Belfast to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to Dulles Intl.

  • Can I find deals for business class flights from Belfast to Dulles Intl?

    Yes. Cheapflights offers flight deals from Belfast to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Travelling to a place near Washington, D.C. Dulles Intl Airport?

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Silver Spring
Hanover
Oxon Hill
Woodbridge
Arlington
Alexandria
College Park

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Belfast Intl to Dulles Intl flights
Belfast Intl to Baltimore flights
Belfast City to Reagan-National flights
Belfast City to Dulles Intl flights
Belfast City to Baltimore flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Belfast to Dulles Intl?

Cheapflights helps you search for flights from Belfast to Dulles Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Belfast to Dulles Intl?

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast to Dulles Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Belfast to Dulles Intl with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Belfast to Dulles Intl, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Belfast to Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Belfast today and book when prices fit your budget.

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