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Cheap flights from Belfast City Airport to Washington, D.C. Dulles Intl Airport from £339

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 14/10. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — IAD
17 Oct — 24 Oct1
1 adult
1 adult, Economy

Cheap flight deals from Belfast City to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Belfast City (BHD) 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 17 September 2025.

Round-trip from

£492

One-way from

£339
American Airlines
  • American Airlines
  • 20/11-24/11
  • 3 total stops
  • 32h 15m total
  • Belfast to Washington, D.C.
Search Deals
14/10
  • 14/10
  • 3 total stops
  • 31h 50m total
  • Belfast to Washington, D.C.
Search Deals

Find flight deals from Belfast City to Dulles Intl

Cheapest flights from Belfast City to Dulles Intl
Explore the most affordable flight options available from Belfast City to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 17 September 2025.

Thu 20/1110:40BHD - IAD
1 stop14h 15mAmerican Airlines
Mon 24/1121:45IAD - BHD
1 stop13h 20mAmerican Airlines
Deal found 14/9£492
Thu 9/1006:30BHD - IAD
1 stop14h 05mKLM
Thu 16/1021:20IAD - BHD
2 stops14h 35mKLM
Deal found 15/9£515
Fri 10/1006:30BHD - IAD
1 stop14h 05mKLM
Sun 12/1017:25IAD - BHD
1 stop22h 50mKLM
Deal found 15/9£566
Fri 10/1006:30BHD - IAD
2 stops21h 30mDelta
Sun 12/1017:25IAD - BHD
1 stop18h 30mDelta
Deal found 15/9£610
Fri 10/1007:00BHD - IAD
2 stops20h 10mMultiple Airlines
Sun 12/1020:30IAD - BHD
2 stops18h 55mMultiple Airlines
Deal found 15/9£623

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast City 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 17 September 2025.
Use the filters below to find and compare flights from Belfast City Airport to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Belfast City

Fly to

Dulles Intl

Route

Depart

Return

Price

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 20/11

10:40-19:55

1 stop14h 15m

Washington, D.C. Dulles Intl

Mon 24/11

21:45-16:05

1 stop13h 20m

£492

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 9/10

06:30-15:35

1 stop14h 05m

Washington, D.C. Dulles Intl

Thu 16/10

17:25-21:15

1 stop22h 50m

£524

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Fri 10/10

06:30-15:35

1 stop14h 05m

Washington, D.C. Dulles Intl

Sun 12/10

17:25-21:15

1 stop22h 50m

£566

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Fri 10/10

06:30-23:00

2 stops21h 30m

Washington, D.C. Dulles Intl

Sun 12/10

17:25-16:55

1 stop18h 30m

£610

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Fri 10/10

07:00-22:10

2 stops20h 10m

Washington, D.C. Dulles Intl

Sun 12/10

20:30-20:25

2 stops18h 55m

£623

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 14/10

18:00-20:50

3 stops31h 50m

£339

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 14/10

06:35-15:55

1 stop14h 20m

£551

Flights are sorted by cheapest return flights first.

Deals found on 14/9

Best time to book a flight from Belfast City to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Belfast City 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 City Airport to Washington, D.C. Dulles Intl Airport

What is the cheapest time of day to fly from BHD to IAD?

Find hourly flight availability from Belfast City to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 September 2025.

When flying from Belfast City Airport to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Related info for your journey

Find useful and relevant information for your journey from Belfast City 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 City Airport to Washington, D.C. Dulles Intl Airport?

    American Airlines can get you from Belfast City Airport to Washington, D.C. Dulles Intl Airport in just under 14h 15m. Your travel time can differ by up to . Airlines will cover a distance of 3390 mi.

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast City 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.

  • What is the cheapest month to book a flight from Belfast City Airport to Washington, D.C. Dulles Intl Airport?

    Currently, January is the cheapest month in which you can book a flight from Belfast City Airport to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Belfast City Airport to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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
College Park
Tysons

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Belfast City to Dulles Intl

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

Fly with Cheapflights

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

Deals for Belfast City to Dulles Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast City 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 City to Dulles Intl with no change fees?

Yes, we can. To see specific flights from Belfast City to Dulles Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

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

Not ready to book yet? You can track prices for flights from Belfast City to Dulles Intl on Cheapflights with our Price Alert feature and get notified when better prices are available.

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