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Cheap flights from Belfast to Washington, D.C. Dulles Intl Airport from £555

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — IAD
9 Jul — 16 Jul1
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 4 July 2025.

Round-trip from

£555
American Airlines
  • American Airlines
  • 20/11-24/11
  • 2 total stops
  • 42h 50m 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 4 July 2025.

Thu 20/1115:05BHD - IAD
1 stop29h 30mAmerican Airlines
Mon 24/1121:55IAD - BHD
1 stop13h 20mAmerican Airlines
Deal found 3/7£555
Thu 20/1106:30BHD - IAD
1 stop14h 15mDelta
Mon 24/1117:35IAD - BHD
1 stop18h 15mDelta
Deal found 2/7£600
Thu 20/1117:20BHD - IAD
2 stops34h 40mVirgin Atlantic
Mon 24/1112:30IAD - BHD
2 stops23h 20mVirgin Atlantic
Deal found 1/7£607
Sat 16/805:45BFS - IAD
2 stops20h 40mMultiple Airlines
Sat 23/809:45IAD - BFS
3 stops31h 45mMultiple Airlines
Deal found 2/7£807
Tue 15/706:55BHD - IAD
2 stops13h 55mAer Lingus
Thu 17/717:20IAD - BHD
2 stops16h 10mAer Lingus
Deal found 3/7£1,177
Sun 13/717:25BHD - IAD
1 stop27h 10mKLM
Thu 17/717:25IAD - BHD
1 stop18h 30mKLM
Deal found 3/7£1,277
Mon 14/717:25BHD - IAD
2 stops28h 18mMultiple Airlines
Sat 19/717:25IAD - BHD
1 stop18h 30mMultiple Airlines
Deal found 3/7£1,315
Mon 14/709:50BHD - IAD
1 stop12h 45mBritish Airways
Thu 17/722:40IAD - BHD
1 stop11h 50mBritish Airways
Deal found 3/7£1,877

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 4 July 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

Thu 20/11

15:05-15:35

1 stop29h 30m

Washington, D.C. Dulles Intl

Mon 24/11

21:55-16:15

1 stop13h 20m

£555

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 20/11

06:30-15:45

1 stop14h 15m

Washington, D.C. Dulles Intl

Mon 24/11

17:35-16:50

1 stop18h 15m

£600

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Thu 20/11

17:20-23:00

2 stops34h 40m

Washington, D.C. Dulles Intl

Mon 24/11

12:30-16:50

2 stops23h 20m

£607

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sat 16/8

05:45-21:04

3 stops20h 19m

Washington, D.C. Dulles Intl

Sat 23/8

09:45-22:30

3 stops31h 45m

£807

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 15/7

06:55-15:50

2 stops13h 55m

Washington, D.C. Dulles Intl

Thu 17/7

17:20-14:30

2 stops16h 10m

£1,177

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 14/7

17:25-15:35

1 stop27h 10m

Washington, D.C. Dulles Intl

Sat 19/7

17:25-21:15

1 stop22h 50m

£1,308

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 14/7

17:25-16:43

2 stops28h 18m

Washington, D.C. Dulles Intl

Sat 19/7

17:25-16:55

1 stop18h 30m

£1,315

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 14/7

09:50-17:35

1 stop12h 45m

Washington, D.C. Dulles Intl

Thu 17/7

22:40-15:30

1 stop11h 50m

£1,877

Flights are sorted by cheapest return flights first.

Deals found on 3/7

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 4 July 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.

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 4 July 2025.
Check out reviews from past customers who have flown with Delta, KLM, andVirgin Atlantic from Belfast to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
7,982 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
1,367 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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
1,144 reviews
Delta
8.0
Very Good
7,982 reviews
Check prices

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Overall

8.0

Comfort

7.9

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.

  • 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
Hanover
Oxon Hill
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.
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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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