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Cheap flights from Washington, D.C. Dulles Intl Airport to Belfast from £402

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 19/7. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BHD
26 Jan — 2 Feb1
1 adult

Cheap flight deals from Dulles Intl to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Belfast (BF1). 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 21 January 2025.

Round-trip from

£499

One-way from

£402

Popular in

June

Cheapest in

October
British Airways
  • British Airways
  • 8/4-1/5
  • 2 total stops
  • 28h 05m total
  • Washington, D.C. to Belfast
Search Deals
19/7
  • 19/7
  • 3 total stops
  • 19h 40m total
  • Washington, D.C. to Belfast
Search Deals
Highest demand for flights based on searches. 14% potential increase in price (£102 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£29 potential savings vs. average return price).
Search Deals

Find flight deals from Dulles Intl to Belfast

Cheapest flights from Dulles Intl to Belfast
Explore the most affordable flight options available from Dulles Intl to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 21 January 2025.

Tue 8/422:40IAD - BHD
1 stop13h 50mBritish Airways
Thu 1/506:35BHD - IAD
1 stop14h 15mBritish Airways
Deal found 20/1£499
Wed 19/219:30IAD - BHD
2 stops16h 05mAmerican Airlines
Tue 25/208:40BHD - IAD
1 stop11h 55mAmerican Airlines
Deal found 21/1£504
Wed 19/217:35IAD - BHD
1 stop18h 15mKLM
Tue 25/206:30BHD - IAD
1 stop14h 15mKLM
Deal found 21/1£529
Thu 6/319:40IAD - BFS
2 stops21h 40mMultiple Airlines
Thu 13/306:30BFS - IAD
2 stops16h 55mMultiple Airlines
Deal found 20/1£616
Sun 16/315:55IAD - BHD
3 stops24h 55mMultiple Airlines
Sun 23/307:00BHD - IAD
2 stops18h 05mMultiple Airlines
Deal found 21/1£665
Tue 8/417:22IAD - BHD
2 stops22h 43mVirgin Atlantic
Thu 1/506:30BHD - IAD
2 stops22h 39mVirgin Atlantic
Deal found 20/1£725
Wed 13/819:05IAD - BHD
2 stops16h 50mDelta
Sat 23/806:30BHD - IAD
2 stops21h 59mDelta
Deal found 21/1£747

Find flights from Dulles Intl to Belfast within your budget

Customise your flight search to find flights from Dulles Intl to Belfast 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 21 January 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 8/4

22:40-17:30

1 stop13h 50m

Belfast City

Thu 1/5

06:35-15:50

1 stop14h 15m

£499

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 19/2

19:30-16:35

2 stops16h 05m

Belfast City

Tue 25/2

08:40-15:35

1 stop11h 55m

£504

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 19/2

17:35-16:50

1 stop18h 15m

Belfast City

Tue 25/2

06:30-15:45

1 stop14h 15m

£529

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 6/3

19:40-22:20

2 stops21h 40m

Belfast Intl

Thu 13/3

06:30-19:25

2 stops16h 55m

£616

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 16/3

15:55-20:50

3 stops24h 55m

Belfast City

Sun 23/3

07:00-21:05

2 stops18h 05m

£665

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 8/4

17:22-21:05

2 stops22h 43m

Belfast City

Thu 1/5

06:30-00:09

2 stops22h 39m

£725

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 1/6

19:50-21:15

2 stops20h 25m

Belfast City

Tue 10/6

06:30-15:35

1 stop14h 05m

£772

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 19/7

22:20-23:00

3 stops19h 40m

£402

Flights are sorted by cheapest return flights first.

Deals found on 19/1

Best time to book a flight from Dulles Intl to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast from Dulles Intl 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 Dulles Intl to Belfast

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

Rainfall in Belfast by month

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

In terms of precipitation, rainfall in Belfast ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast when rainfall is around 50.0 mm.

Temperature in Belfast by month

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

If weather is an important factor for your trip to Belfast, 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 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

Reviews of airlines servicing Belfast

Get insights into the airlines that provide service to Belfast. 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 Belfast. Reviews last updated 21 January 2025.
Delta
8.0
Very Good
8,521 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very Good
8,521 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic
7.5
Good
665 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

British Airways
6.6
Okay
6,834 reviews
Delta
8.0
Very Good
8,521 reviews
Check prices

Food

7.3

Entertainment

7.9

Boarding

8.2

Comfort

8.0

Crew

8.6

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

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

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to Belfast is British Airways. Our recent data shows that you can find tickets from as low as £499 on this airline. Additional options worth looking into are American Airlines and KLM, starting at £504 and £529 round-trip. Users have found that British Airways is 29% cheaper than the other options available to this destination.

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

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

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

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Belfast.

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Belfast 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 Washington, D.C. Dulles Intl Airport to Belfast?

    Currently, January is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Belfast (average of £67). Flying from Washington, D.C. Dulles Intl Airport to Belfast in July is currently the most expensive (average of £90). 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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Complete your trip

Complete your trip to Belfast by adding a car hire and/or hotel booking to your travel itinerary.
Belfast car hire
Belfast Intl Airport car hire
Londonderry Eglinton Airport car hire
Isle of Islay Glenegedale Airport car hire
Londonderry car hire

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Need flexible booking options for your flight to Belfast from Dulles Intl? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

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

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

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