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$293+ Cheap flights from Dulles Intl (IAD) to Belfast

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 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BHD
ene. 3 — ene. 101
sáb. 1/3
sáb. 1/10
1 adult, Economy
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Cheap 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 diciembre 4, 2025.

This oojo deal was found by Cheapflights users on 12/4. 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.
sáb. 12/279:45 pmIAD - BHD
1 stop11h 30mBritish Airways
dom. 1/410:40 amBHD - IAD
2 stops42h 24mBritish Airways
Deal found 12/4$1,442
This oojo deal was found by Cheapflights users on 12/4. 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.
sáb. 12/275:05 pmIAD - BHD
2 stops14h 45mMultiple Airlines
dom. 1/410:40 amBHD - IAD
2 stops42h 24mMultiple Airlines
Deal found 12/4$1,507
This KLM deal was found by Cheapflights users on 12/4. 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.
sáb. 12/276:05 pmIAD - BHD
1 stop17h 45mKLM
dom. 1/46:30 amBHD - IAD
1 stop14h 35mKLM
Deal found 12/4$1,521
This Ovago deal was found by Cheapflights users on 12/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/175:05 pmIAD - BHD
2 stops16h 00mAer Lingus
jue. 12/185:45 pmBHD - IAD
1 stop26h 50mAer Lingus
Deal found 12/3$1,664
This Mytrip deal was found by Cheapflights users on 12/3. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/175:05 pmIAD - BFS
2 stops13h 15mMultiple Airlines
jue. 12/182:45 pmBFS - IAD
2 stops29h 50mMultiple Airlines
Deal found 12/3$1,734
This Mytrip deal was found by Cheapflights users on 12/4. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/275:05 pmIAD - BFS
2 stops24h 05mMultiple Airlines
dom. 1/41:15 pmBFS - IAD
2 stops31h 20mMultiple Airlines
Deal found 12/4$1,754
This Ovago deal was found by Cheapflights users on 12/3. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/176:20 pmIAD - BHD
1 stop10h 55mMultiple Airlines
jue. 12/188:00 pmBHD - IAD
1 stop24h 35mMultiple Airlines
Deal found 12/3$3,732

Find 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 diciembre 4, 2025.

Round-trip from

$587
(Cheapflightsfares)

One-way from

$293
(Trip.com)

Popular in

June

Cheapest in

February

Average price

$691
From Washington, D.C. Dulles Intl to Belfast
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One-way flight from Washington, D.C. Dulles Intl to Belfast
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Highest demand for flights based on searches. 19% potential increase in price ($196 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($44 potential savings vs. average RT price).
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Average for round-trip flights in December 2025
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Cheapflights Fare Finder

 
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 diciembre 4, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Belfast that are best for you.

Fly from

Dulles Intl

Fly to

Belfast

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

jue. 3/5

6:20 pm-10:20 am

1 stop11h 00m

Belfast City

jue. 3/12

6:35 am-4:35 pm

1 stop14h 00m

$587

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

lun. 3/16

10:45 pm-2:15 pm

1 stop11h 30m

Belfast City

dom. 3/22

12:10 pm-4:35 pm

1 stop32h 25m

$605

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

mié. 2/11

9:45 pm-2:15 pm

1 stop11h 30m

Belfast City

dom. 2/15

9:10 am-3:35 pm

1 stop11h 25m

$607

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

sáb. 1/17

7:40 pm-10:40 pm

2 stops22h 00m

Belfast Intl

sáb. 1/24

6:00 am-6:30 pm

2 stops17h 30m

$632

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

jue. 3/5

12:23 pm-4:50 pm

2 stops23h 27m

Belfast City

jue. 3/12

6:30 am-5:05 pm

1 stop14h 35m

$655

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

lun. 3/16

7:59 pm-4:50 pm

2 stops16h 51m

Belfast City

dom. 3/22

5:20 pm-5:05 pm

1 stop27h 45m

$655

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

mié. 1/21

7:30 pm-4:50 pm

2 stops16h 20m

Belfast City

mié. 1/28

5:20 pm-4:05 pm

1 stop27h 45m

$668

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

jue. 1/8

7:40 pm-8:25 pm

2 stops19h 45m

Belfast Intl

lun. 1/12

7:50 am-6:30 pm

2 stops15h 40m

$669

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

vie. 5/1

5:05 pm-11:20 pm

3 stops25h 15m

Belfast Intl

mié. 5/6

4:20 pm-8:35 pm

3 stops33h 15m

$813

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

vie. 3/27

6:05 pm-10:10 am

2 stops12h 05m

Belfast Intl

sáb. 4/4

6:55 am-6:55 pm

2 stops17h 00m

$1,380

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/4

Showing 1-10 of 11 results
1
2

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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Belfast
No data available for this route at this time. Please check back soon.

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 diciembre 4, 2025.
Read through reviews of airlines operating flights from Washington, D.C. Dulles Intl Airport to Belfast, such as British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,562 reviews

Boarding

6.9

Food

6.4

Entertainment

6.4

Crew

7.6

Comfort

6.7

Overall

6.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.
British Airways
6.7
Okay
7,562 reviews
British Airways
6.7
Okay
7,562 reviews

Boarding

6.9

Food

6.4

Entertainment

6.4

Crew

7.6

Comfort

6.7

Overall

6.7

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

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.

  • How long is the flight from Washington, D.C. Dulles Intl Airport to Belfast?

    For as low as $587, British Airways can have you in Belfast from Washington, D.C. Dulles Intl Airport in 11h. There are 3390 mi between Washington, D.C. Dulles Intl Airport and Belfast.

  • What is the cheapest airline to fly 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 $620.

  • 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.

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 diciembre 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$620Average$854FlexibilityNo cancel feeOn-time70%

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