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Cheap flights from Belfast to Washington, D.C. Dulles Intl Airport from £691

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/5. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — IAD
28 Feb — 7 Mar1
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 23 February 2025.

Round-trip from

£691
British Airways
  • British Airways
  • 14/5-11/6
  • 2 total stops
  • 22h 40m 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 23 February 2025.

Wed 14/510:00BHD - IAD
1 stop10h 45mBritish Airways
Wed 11/622:40IAD - BHD
1 stop11h 55mBritish Airways
Deal found 21/2£691
Sun 6/421:00BFS - IAD
3 stops27h 05mMultiple Airlines
Sun 13/423:05IAD - BFS
2 stops18h 15mMultiple Airlines
Deal found 22/2£745
Wed 14/510:00BHD - IAD
1 stop10h 50mMultiple Airlines
Wed 11/616:35IAD - BHD
2 stops21h 05mMultiple Airlines
Deal found 21/2£775
Wed 14/506:30BHD - IAD
2 stops15h 39mKLM
Wed 11/621:20IAD - BHD
2 stops14h 35mKLM
Deal found 21/2£805
Mon 19/509:50BHD - IAD
2 stops34h 10mIberia
Wed 11/622:40IAD - BHD
1 stop15h 00mIberia
Deal found 22/2£892
Mon 19/509:50BHD - IAD
2 stops14h 05mAer Lingus
Wed 11/617:20IAD - BHD
2 stops13h 35mAer Lingus
Deal found 22/2£899

Find flights from Belfast to Dulles Intl within your budget

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 23 February 2025.

Fly from

Belfast

Fly to

Dulles Intl

Route

Depart

Return

Price

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 14/5

10:00-15:45

1 stop10h 45m

Washington, D.C. Dulles Intl

Wed 11/6

22:40-15:35

1 stop11h 55m

£691

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 6/4

21:00-19:05

3 stops27h 05m

Washington, D.C. Dulles Intl

Sun 13/4

23:05-22:20

2 stops18h 15m

£745

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 14/5

10:00-15:50

1 stop10h 50m

Washington, D.C. Dulles Intl

Wed 11/6

16:35-18:40

2 stops21h 05m

£775

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Wed 14/5

06:30-17:09

2 stops15h 39m

Washington, D.C. Dulles Intl

Wed 11/6

21:20-16:55

2 stops14h 35m

£805

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 19/5

09:50-15:00

2 stops34h 10m

Washington, D.C. Dulles Intl

Wed 11/6

22:40-18:40

1 stop15h 00m

£892

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 19/5

09:50-18:55

2 stops14h 05m

Washington, D.C. Dulles Intl

Wed 11/6

17:20-11:55

2 stops13h 35m

£899

Flights are sorted by cheapest return flights first.

Deals found on 21/2

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.

Travel insights for flights from Belfast to Dulles Intl

Get recent, data-driven insights about flights from Belfast to Dulles Intl including ideal travel times, pricing trends, and more.

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 23 February 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 23 February 2025.
KLM
7.8
Good
1,333 reviews
Check prices

Boarding

7.8

Overall

7.8

Entertainment

7.2

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

KLM
7.8
Good
1,333 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Boarding

7.8

Overall

7.8

Entertainment

7.2

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Aer Lingus
7.0
Good
1,071 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Boarding

7.8

Overall

7.8

Entertainment

7.2

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

Iberia
7.0
Good
2,639 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Boarding

7.8

Overall

7.8

Entertainment

7.2

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

British Airways
6.6
Okay
6,754 reviews
KLM
7.8
Good
1,333 reviews
Check prices

Boarding

7.8

Overall

7.8

Entertainment

7.2

Food

7.3

Crew

8.4

Comfort

7.7

Reviews

1 / 20

8.0
Excellent

Anonymous,Dec 2024

YWG - YYZ

I could not select a seat prior to check in as systems not integrated. Different PNRs should be on reservation which would make process easier.

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 are the cheapest airlines flying from Belfast to Washington, D.C. Dulles Intl Airport round-trip?

    According to our current data, British Airways (£691), KLM (£805), and Iberia (£892) 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

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Silver Spring
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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.
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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 23 February 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£721Average£754FlexibilityNo 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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