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Belfast Intl

$249+ 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 3/10. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — BFS
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
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 January 29, 2026.

This Mytrip deal was found by Cheapflights users on 1/27. 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.
Thu 5/148:30 pm
IAD
-
BFS
2 stops18h 00m
Multiple Airlines
Sun 5/179:55 am
BFS
-
IAD
2 stops17h 20m
Multiple Airlines
Deal found 1/27$777
This Mytrip deal was found by Cheapflights users on 1/27. 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.
Thu 3/122:30 pm
IAD
-
BFS
2 stops28h 05m
Multiple Airlines
Thu 3/192:00 pm
BFS
-
IAD
2 stops26h 45m
Multiple Airlines
Deal found 1/27$817
This Mytrip deal was found by Cheapflights users on 1/28. 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 3/142:30 pm
IAD
-
BFS
2 stops25h 45m
Multiple Airlines
Sat 3/215:45 am
BFS
-
IAD
2 stops35h 00m
Multiple Airlines
Deal found 1/28$920
This Booking.com deal was found by Cheapflights users on 1/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 3/132:30 pm
IAD
-
BFS
2 stops24h 25m
Multiple Airlines
Fri 3/207:00 am
BFS
-
IAD
2 stops33h 45m
Multiple Airlines
Deal found 1/27$1,011

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$777
(Mytrip)

One-way from

$249
(Kiwi.com)
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 January 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

Dulles Intl

Fly to

Belfast Intl

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 5/14

8:30 pm-7:30 pm

2 stops18h 00m

Belfast Intl

Sun 5/17

9:55 am-10:15 pm

2 stops17h 20m

$777

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 3/12

2:30 pm-10:35 pm

2 stops28h 05m

Belfast Intl

Thu 3/19

2:00 pm-12:45 pm

2 stops26h 45m

$817

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sat 3/14

2:30 pm-8:15 pm

2 stops25h 45m

Belfast Intl

Sat 3/21

5:45 am-12:45 pm

2 stops35h 00m

$920

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 3/13

2:30 pm-6:55 pm

2 stops24h 25m

Belfast Intl

Fri 3/20

7:00 am-12:45 pm

2 stops33h 45m

$1,011

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Tue 3/10

6:30 pm-7:50 am

3 stops33h 20m

$249

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 3/9

6:30 pm-10:45 am

3 stops36h 15m

$291

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 3/15

11:30 pm-8:20 am

3 stops52h 50m

$294

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 3/11

8:40 pm-7:25 am

3 stops30h 45m

$302

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 3/13

8:09 am-11:55 am

3 stops23h 46m

$400

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

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 January.
ProviderPrice AccuracyTrust Score*
OvagoPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*2 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 January 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
7,705 reviews

Boarding

6.9

Overall

6.7

Food

6.4

Crew

7.6

Entertainment

6.4

Comfort

6.8

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.
British Airways
6.7
Okay
7,705 reviews
British Airways
6.7
Okay
7,705 reviews

Boarding

6.9

Overall

6.7

Food

6.4

Crew

7.6

Entertainment

6.4

Comfort

6.8

Reviews

1 / 20
8.0
Excellent

Lakshmi,Dec 2025

SFO - LHR

I had a great time on the flight with good entertainment and food. The staff was awesome. The only thing was there was a delay in boarding and takeoff from London. However, I was pleasantly surprised when the airline sent an apology for the few later landing in Mumbai. They did not have WiFi on board on the leg from London to Mumbai but that was okay for me. On the first leg from SF to London, a couple of seats ahead of me had issues with their display so they could not watch anything on their screens although the stewardess gas be them an option to use the WiFi on their devices. This did not affect me, however, so that was cool. I would recommend British Airways. This was my first time flying with them and I had a lovely flight.

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 $627.

  • 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.

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Alternative routes for Dulles Intl to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
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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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$627Average$861FlexibilityNo cancel feeOn-time70%

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