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Cheap flights from Belfast to Washington, D.C. Dulles Intl Airport from £667

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 30/6. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — IAD
5 May — 12 May1
1 adult

Cheap 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 30 April 2025.

Round-trip from

£1,047

One-way from

£667
Air France
  • Air France
  • 22/6-26/6
  • 2 total stops
  • 51h 40m total
  • Belfast to Washington, D.C.
Search Deals
Aer Lingus
  • Aer Lingus
  • 30/6
  • 2 total stops
  • 26h 55m total
  • Belfast to Washington, D.C.
Search Deals

Find flight deals from Belfast to Dulles Intl

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 30 April 2025.

Sun 22/611:25BHD - IAD
1 stop33h 10mMultiple Airlines
Thu 26/617:25IAD - BHD
1 stop18h 30mMultiple Airlines
Deal found 29/4£1,047
Sun 22/611:00BHD - IAD
2 stops37h 44mAmerican Airlines
Thu 26/619:25IAD - BHD
1 stop10h 45mAmerican Airlines
Deal found 29/4£1,081

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 30 April 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

Belfast

Fly to

Dulles Intl

Route

Depart

Return

Price

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sun 22/6

11:25-15:35

1 stop33h 10m

Washington, D.C. Dulles Intl

Thu 26/6

17:25-16:55

1 stop18h 30m

£1,047

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sun 22/6

11:00-19:44

2 stops37h 44m

Washington, D.C. Dulles Intl

Thu 26/6

19:25-11:10

1 stop10h 45m

£1,081

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 30/6

17:55-15:50

2 stops26h 55m

£667

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 30/6

19:30-15:55

1 stop25h 25m

£1,268

Flights are sorted by cheapest return flights first.

Deals found on 29/4

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

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

Find hourly flight availability from Belfast 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 30 April 2025.

When flying from Belfast to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 11% versus a flight in the morning.

Rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.

Temperature in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated 30 April 2025.
Finnair
7.6
Good
1,275 reviews
Check prices

Boarding

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2023

LHR - EWR

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.
Finnair
7.6
Good
1,275 reviews
Finnair
7.6
Good
1,275 reviews
Check prices

Boarding

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2023

LHR - EWR

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.
American Airlines
7.2
Good
10,000 reviews
Finnair
7.6
Good
1,275 reviews
Check prices

Boarding

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2023

LHR - EWR

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.
Aer Lingus
7.0
Good
1,076 reviews
Finnair
7.6
Good
1,275 reviews
Check prices

Boarding

7.6

Crew

8.1

Entertainment

6.9

Food

6.7

Overall

7.6

Comfort

7.4

Reviews

1 / 20
4.0
Okay

Anonymous,Sept 2023

LHR - EWR

Waited about 90 minutes in passport control in Newark because there were only 2 gates open for much of the time with several hundred people in the line.

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.

  • What is the cheapest airline to fly from Belfast to Washington, D.C. Dulles Intl Airport round-trip?

    According to our current data, American Airlines (£1,081), offers the cheapest pricing from Belfast to Washington, D.C. Dulles Intl Airport.

  • 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.

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

    Currently, January is the cheapest month in which you can book a flight from Belfast to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Belfast 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 Belfast?

Book flights to Belfast if you plan to visit one of these locations
Silver Spring
Arlington
Woodbridge
College Park
Laurel
Tysons

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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 Baltimore flights
Belfast City to Reagan-National flights
Belfast Intl to Dulles Intl flights
Belfast City to Dulles Intl flights
Belfast City to Baltimore flights

Top airline flying from Belfast to Dulles Intl

Discover the top airline that operate flights from Belfast to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 30 April 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£679Average£688FlexibilityNo cancel feeOn-time70%
Search British Airways 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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