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Belfast Intl

$338+ Cheap flights from Dulles Intl (IAD) to Belfast Intl (BFS)

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BFS
Apr 28 — May 51
Tue 4/28
Tue 5/5
1 adult, Economy
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Cheap flight deals from Dulles Intl to Belfast Intl

Cheapest flights from Dulles Intl to Belfast Intl
Explore the most affordable flight options available from Dulles Intl to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 29, 2026.

This Mytrip deal was found by Cheapflights users on 3/26. 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.
Sun 5/108:30 pm
IAD
-
BFS
2 stops20h 00m
Multiple Airlines
Sun 5/178:20 pm
BFS
-
IAD
3 stops47h 50m
Multiple Airlines
Deal found 3/26$725
This Mytrip deal was found by Cheapflights users on 3/25. 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.
Sat 5/98:30 pm
IAD
-
BFS
2 stops19h 10m
Multiple Airlines
Sat 5/167:40 am
BFS
-
IAD
3 stops35h 35m
Multiple Airlines
Deal found 3/25$759
This Mytrip deal was found by Cheapflights users on 3/28. 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.
Tue 8/258:30 pm
IAD
-
BFS
2 stops20h 45m
Multiple Airlines
Sun 9/68:20 pm
BFS
-
IAD
3 stops47h 50m
Multiple Airlines
Deal found 3/28$904
This Mytrip deal was found by Cheapflights users on 3/28. 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.
Sun 5/243:45 pm
IAD
-
BFS
3 stops22h 05m
Multiple Airlines
Mon 5/259:05 pm
BFS
-
IAD
3 stops47h 05m
Multiple Airlines
Deal found 3/28$943
This Mytrip deal was found by Cheapflights users on 3/25. 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.
Fri 9/258:30 pm
IAD
-
BFS
3 stops21h 50m
Multiple Airlines
Sun 10/47:00 am
BFS
-
IAD
3 stops41h 00m
Multiple Airlines
Deal found 3/25$947
This Mytrip deal was found by Cheapflights users on 3/28. 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.
Sat 4/118:30 pm
IAD
-
BFS
2 stops20h 00m
Multiple Airlines
Tue 4/148:50 am
BFS
-
IAD
3 stops40h 45m
Multiple Airlines
Deal found 3/28$948
This Mytrip deal was found by Cheapflights users on 3/28. 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.
Sat 8/155:05 pm
IAD
-
BFS
2 stops22h 35m
Multiple Airlines
Sat 8/229:40 pm
BFS
-
IAD
3 stops46h 30m
Multiple Airlines
Deal found 3/28$990

Find flight deals from Dulles Intl to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Belfast Intl (BFS). 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 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$725
(Mytrip)

One-way from

$338
(Mytrip)
Provider with most accurate pricing for Washington, D.C. Dulles Intl-Belfast Intl flight deals.
Search Deals
Provider most trusted by Cheapflights users for Washington, D.C. Dulles Intl-Belfast Intl flights.
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From Washington, D.C. Dulles Intl to Belfast Intl
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One-way flight from Washington, D.C. Dulles Intl to Belfast Intl
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Belfast 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 2,558,603 searches. Data last updated March 29, 2026.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 5/10

8:30 pm-9:30 pm

2 stops20h 00m

Belfast Intl

Sun 5/17

8:20 pm-3:10 pm

3 stops47h 50m

$725

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 5/9

8:30 pm-8:40 pm

2 stops19h 10m

Belfast Intl

Sat 5/16

7:40 am-2:15 pm

3 stops35h 35m

$759

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 4/11

8:30 pm-9:30 pm

2 stops20h 00m

Belfast Intl

Tue 4/14

8:50 am-8:35 pm

3 stops40h 45m

$948

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 8/15

5:05 pm-8:40 pm

2 stops22h 35m

Belfast Intl

Sat 8/22

9:40 pm-3:10 pm

3 stops46h 30m

$990

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 8/14

9:00 pm-9:15 pm

2 stops19h 15m

Belfast Intl

Sun 8/23

4:30 pm-3:10 pm

2 stops27h 40m

$1,126

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 7/8

9:45 am-10:20 pm

3 stops31h 35m

Belfast Intl

Sun 7/12

8:45 am-3:10 pm

3 stops35h 25m

$1,191

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 6/21

4:00 pm-2:35 pm

2 stops17h 35m

Belfast Intl

Wed 6/24

4:45 pm-3:10 pm

2 stops27h 25m

$1,289
Quickest round-trip

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 9/25

9:00 pm-5:45 pm

2 stops15h 45m

Belfast Intl

Sun 10/4

8:35 am-7:20 pm

2 stops15h 45m

$1,342
Cheapest one-way
Quickest one-way

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 5/10

8:30 pm-9:30 pm

2 stops20h 00m

$338

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 5/24

3:45 pm-9:00 pm

3 stops24h 15m

$433

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/26

Sorted by cheapest first

Compare providers for flights from Dulles Intl to Belfast Intl

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Belfast Intl in March.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-Belfast Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Dulles Intl to Belfast Intl

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

Reviews of airlines servicing Belfast Intl

Get insights into the airlines that provide service to Belfast 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 Belfast Intl. Reviews last updated March 29, 2026.
Peruse reviews from past customers who have flown with British Airways from Washington, D.C. Dulles Intl Airport to Belfast 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.
British Airways
6.7
Okay
7,829 reviews

Crew

7.6

Boarding

6.9

Entertainment

6.4

Comfort

6.8

Food

6.4

Overall

6.7

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance
British Airways
6.7
Okay
7,829 reviews
British Airways
6.7
Okay
7,829 reviews

Crew

7.6

Boarding

6.9

Entertainment

6.4

Comfort

6.8

Food

6.4

Overall

6.7

Reviews

1 / 20
10.0
Excellent

Viorica,Mar 2026

PHX - LHR

The food lately is just from poor to very poor. I bealeave that you can serve less quantities for more quality food. Exemple : at breakfast : omlete and vegetarian omlete ....I beleave with less work less personel could be provide some hummus and carrots and some boiled egss plus whatever snacks or drinks you wish....... Thank you in advance

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Belfast Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Washington, D.C. Dulles Intl Airport to Belfast Intl Airport round-trip?

    Flying on British Airways is currently your cheapest option to Belfast Intl Airport, with prices starting at $652.

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

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

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

    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 Intl.

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Belfast 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.

See more FAQs

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Other flights to Belfast Intl

Explore flights to Belfast Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on March 29, 2026.
Belfast Intl Airport to Edinburgh flights
Belfast Intl Airport to Glasgow Intl Airport flights
Belfast Intl Airport to Edinburgh flights

Top airline flying from Dulles Intl to Belfast Intl

Discover the top airline that operate flights from Dulles Intl to Belfast Intl. 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 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$652Average$861FlexibilityNo cancel feeOn-time70%

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