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Cheap flights from Belfast to Washington, D.C. Dulles Intl Airport from £622

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/7. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — IAD
18 Jun — 25 Jun1
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 13 June 2025.

Round-trip from

£622
3/7-9/7
  • 3/7-9/7
  • 4 total stops
  • 55h 47m 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 13 June 2025.

Thu 3/706:00BFS - IAD
2 stops32h 37mMultiple Airlines
Wed 9/714:25IAD - BFS
2 stops23h 10mMultiple Airlines
Deal found 11/6£622
Mon 3/1117:20BHD - IAD
1 stop27h 25mDelta
Tue 30/1217:35IAD - BHD
1 stop18h 15mDelta
Deal found 12/6£1,875
Tue 4/1108:40BHD - IAD
2 stops15h 50mAmerican Airlines
Tue 30/1221:55IAD - BHD
1 stop13h 50mAmerican Airlines
Deal found 12/6£1,896
Mon 3/1119:30BHD - IAD
2 stops25h 05mBritish Airways
Sat 27/1218:15IAD - BHD
1 stop11h 55mBritish Airways
Deal found 12/6£1,927
Tue 4/1106:30BHD - IAD
2 stops15h 05mMultiple Airlines
Sat 27/1217:35IAD - BHD
1 stop18h 15mMultiple Airlines
Deal found 12/6£1,932
Tue 4/1106:55BHD - IAD
2 stops13h 40mAer Lingus
Fri 26/1217:05IAD - BHD
2 stops14h 45mAer Lingus
Deal found 12/6£1,935
Tue 4/1106:30BHD - IAD
2 stops15h 05mKLM
Fri 26/1217:35IAD - BHD
1 stop18h 15mKLM
Deal found 12/6£2,352

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 13 June 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.

BFS - IAD

BFSIAD

Belfast Intl

Thu 3/7

06:00-09:37

2 stops32h 37m

Washington, D.C. Dulles Intl

Wed 9/7

14:25-18:35

2 stops23h 10m

£622

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 3/11

17:20-15:45

1 stop27h 25m

Washington, D.C. Dulles Intl

Tue 30/12

17:35-16:50

1 stop18h 15m

£1,875

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 4/11

08:40-19:30

2 stops15h 50m

Washington, D.C. Dulles Intl

Tue 30/12

21:55-16:45

1 stop13h 50m

£1,896

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 3/11

19:30-15:35

2 stops25h 05m

Washington, D.C. Dulles Intl

Sat 27/12

18:15-11:10

1 stop11h 55m

£1,927

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 4/11

06:30-16:35

2 stops15h 05m

Washington, D.C. Dulles Intl

Sat 27/12

17:35-16:50

1 stop18h 15m

£1,932

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 4/11

06:55-15:35

2 stops13h 40m

Washington, D.C. Dulles Intl

Fri 26/12

17:05-12:50

2 stops14h 45m

£1,935

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 4/11

06:30-16:35

2 stops15h 05m

Washington, D.C. Dulles Intl

Fri 26/12

17:35-16:50

1 stop18h 15m

£2,352

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 30/6

18:45-19:30

2 stops29h 45m

£720

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sun 20/7

06:50-20:15

1 stop18h 25m

£1,099

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 30/6

06:30-15:35

1 stop14h 05m

£1,276

Flights are sorted by cheapest return flights first.

Deals found on 12/6

Showing 1-10 of 11 results
1
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.

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 13 June 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 13 June 2025.
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very Good
7,950 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,358 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
652 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Aer Lingus
7.1
Good
1,118 reviews
Delta
8.0
Very Good
7,950 reviews
Check prices

Food

7.3

Boarding

8.2

Comfort

7.9

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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 to fly from Belfast to Washington, D.C. Dulles Intl Airport one-way?

    One-way options have recently been found by users for as low as £720 on Aer Lingus. Other airlines that offer cheap prices include British Airways from £1,099 and Virgin Atlantic from £1,276 one-way.

  • 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
Hanover
Oxon Hill
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.
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Fly with Cheapflights

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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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