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$627+ Cheap flights from Dulles Intl (IAD) to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/31. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BHD
Mar 8 — Mar 151
Sat 3/8
Sat 3/15
1 adult, Economy
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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 March 3, 2025.

Round-trip from

$627
(oojo)

Popular in

June

Cheapest in

October

Average price

$756
From Washington, D.C. Dulles Intl to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($219 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($60 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
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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 March 3, 2025.

This oojo deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/3110:40 pmIAD - BHD
1 stop12h 00mBritish Airways
Mon 4/76:30 pmBHD - IAD
1 stop30h 40mBritish Airways
Deal found 3/2$627
This Bravofly deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Bravofly is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/176:35 pmIAD - BHD
1 stop18h 15mVirgin Atlantic
Mon 3/315:25 pmBHD - IAD
2 stops30h 54mVirgin Atlantic
Deal found 3/3$645
This Expedia deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/2010:45 pmIAD - BHD
1 stop13h 30mIberia
Sun 9/286:50 amBHD - IAD
1 stop14h 10mIberia
Deal found 3/2$656
This American Airlines deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/315:27 pmIAD - BHD
2 stops14h 28mAmerican Airlines
Mon 4/76:40 amBHD - IAD
2 stops18h 01mAmerican Airlines
Deal found 3/2$670
This Air France deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/35:35 pmIAD - BHD
1 stop18h 15mMultiple Airlines
Mon 3/106:30 amBHD - IAD
1 stop14h 15mMultiple Airlines
Deal found 3/2$674
This Delta deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 3/177:59 pmIAD - BHD
2 stops21h 01mDelta
Mon 3/316:30 amBHD - IAD
2 stops17h 49mDelta
Deal found 3/3$681
This Trip.com deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/28:30 pmIAD - BFS
2 stops18h 35mMultiple Airlines
Fri 5/96:05 amBFS - IAD
2 stops18h 15mMultiple Airlines
Deal found 3/2$708
This KLM deal was found by Cheapflights users on 3/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/135:35 pmIAD - BHD
1 stop22h 25mKLM
Sat 12/205:20 pmBHD - IAD
1 stop27h 25mKLM
Deal found 3/3$814
This Gurufare deal was found by Cheapflights users on 3/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/205:50 pmIAD - BHD
1 stop11h 20mAer Lingus
Sun 9/288:05 pmBHD - IAD
2 stops27h 50mAer Lingus
Deal found 3/2$851

Find flights from Dulles Intl to Belfast within your budget

Customize 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 2,558,603 searches. Data last updated March 3, 2025.

Fly from

Dulles Intl

Fly to

Belfast

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 3/31

10:40 pm-3:40 pm

1 stop12h 00m

Belfast City

Mon 4/7

6:30 pm-8:10 pm

1 stop30h 40m

$627

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 3/17

6:35 pm-4:50 pm

1 stop18h 15m

Belfast City

Mon 3/31

5:25 pm-7:19 pm

2 stops30h 54m

$645

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 3/31

5:27 pm-12:55 pm

2 stops14h 28m

Belfast City

Mon 4/7

6:40 am-7:41 pm

2 stops18h 01m

$670

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 3/17

7:59 pm-9:00 pm

2 stops21h 01m

Belfast City

Mon 3/31

6:30 am-7:19 pm

2 stops17h 49m

$681

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 5/2

8:30 pm-8:05 pm

2 stops18h 35m

Belfast Intl

Fri 5/9

6:05 am-7:20 pm

2 stops18h 15m

$708

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Fri 5/2

8:30 pm-8:25 pm

2 stops18h 55m

Belfast City

Fri 5/9

7:00 am-7:20 pm

2 stops41h 20m

$750

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 4/24

5:20 pm-2:30 pm

2 stops16h 10m

Belfast City

Mon 4/28

6:45 pm-3:50 pm

2 stops26h 05m

$875

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sun 7/13

7:05 pm-4:55 pm

2 stops16h 50m

Belfast City

Fri 7/18

6:30 am-3:35 pm

1 stop14h 05m

$1,164

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 5/23

11:15 pm-8:05 pm

2 stops15h 50m

$685

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Fri 5/23

11:15 pm-8:25 pm

2 stops16h 10m

$722

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/2

Showing 1-10 of 11 results
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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 round-trip 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.

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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Belfast (average of $657). Flying from Washington, D.C. Dulles Intl Airport to Belfast in June is currently the most expensive (average of $1,189). 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.

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 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Belfast when rainfall is around 2.0 in.

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 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

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 March 3, 2025.
Peruse reviews from past customers who have flown with KLM, American Airlines and Aer Lingus from Washington, D.C. to Belfast 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.
KLM
7.8
Good
1,322 reviews

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

KLM
7.8
Good
1,322 reviews
KLM
7.8
Good
1,322 reviews

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,322 reviews

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

Aer Lingus
7.0
Good
1,064 reviews
KLM
7.8
Good
1,322 reviews

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

British Airways
6.6
Okay
6,740 reviews
KLM
7.8
Good
1,322 reviews

Crew

8.4

Food

7.3

Overall

7.8

Boarding

7.8

Comfort

7.7

Entertainment

7.2

Reviews

1 / 20

8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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?

    Flying on British Airways is currently your cheapest option to Belfast, with prices starting at $627. Additional round-trip tickets that might be worth considering are offered by American Airlines and Aer Lingus, with the lowest prices starting at $670 and $875, respectively. British Airways is priced at 30% lower than the current average price of a flight leaving 3 months from now.

  • 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 vacation 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, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Belfast (average of $657). Flying from Washington, D.C. Dulles Intl Airport to Belfast in June is currently the most expensive (average of $1,189). 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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Top airline flying from Dulles Intl to Belfast

Discover the top airline that operate flights from Dulles Intl to Belfast. 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 2,558,603 searches. Data last updated March 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$557Average$920FlexibilityNo cancel feeOn-time70%
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