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Belfast Intl

$279+ Cheap flights from Washington, D.C. (WAS) 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 10/17. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BFS
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Belfast Intl

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 September 11, 2025.

Round-trip from

$685
(Mytrip)

One-way from

$279
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$633
From Washington, D.C. (WAS) to Belfast Intl
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One-way flight from Washington, D.C. (WAS) to Belfast Intl
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Highest demand for flights based on searches. 22% potential increase in price ($217 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($43 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Washington, D.C. to Belfast Intl

Cheapest flights from Washington, D.C. to Belfast Intl
Explore the most affordable flight options available from Washington, D.C. to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This Mytrip deal was found by Cheapflights users on 9/11. 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 10/268:40 pmBWI - BFS
2 stops18h 15mMultiple Airlines
Sun 11/27:10 amBFS - BWI
2 stops16h 30mMultiple Airlines
Deal found 9/11$685
This Mytrip deal was found by Cheapflights users on 9/9. 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 10/105:00 pmIAD - BFS
2 stops25h 05mMultiple Airlines
Tue 10/147:25 amBFS - IAD
3 stops36h 55mMultiple Airlines
Deal found 9/9$792
This Mytrip deal was found by Cheapflights users on 9/9. 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 10/248:30 pmBWI - BFS
2 stops19h 40mMultiple Airlines
Fri 10/3110:35 amBFS - BWI
2 stops13h 05mMultiple Airlines
Deal found 9/9$797
This Mytrip deal was found by Cheapflights users on 9/11. 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 10/269:45 amIAD - BFS
3 stops29h 10mMultiple Airlines
Sun 11/25:45 amBFS - IAD
3 stops38h 30mMultiple Airlines
Deal found 9/11$848
This Trip.com deal was found by Cheapflights users on 9/11. 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 9/2611:10 amDCA - BFS
2 stops22h 55mMultiple Airlines
Thu 10/96:10 amBFS - DCA
2 stops32h 56mMultiple Airlines
Deal found 9/11$885
This Mytrip deal was found by Cheapflights users on 9/10. 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 10/258:40 pmBWI - BFS
2 stops14h 00mMultiple Airlines
Sat 11/16:55 amBFS - BWI
2 stops16h 45mMultiple Airlines
Deal found 9/10$935
This Kiwi.com deal was found by Cheapflights users on 9/10. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/265:50 pmIAD - BFS
1 stop14h 40mMultiple Airlines
Thu 10/97:10 amBFS - IAD
2 stops18h 40mMultiple Airlines
Deal found 9/10$1,016

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 September 11, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Belfast Intl Airport that are best for you.

Fly from

Washington, D.C.

Fly to

Belfast Intl

Route

Depart

Return

Price

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Sun 10/26

8:40 pm-6:55 pm

2 stops18h 15m

Belfast Intl

Sun 11/2

7:10 am-6:40 pm

2 stops16h 30m

$685

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 10/26

11:30 pm-8:10 pm

2 stops16h 40m

Belfast Intl

Sun 11/2

5:45 am-4:15 pm

3 stops38h 30m

$792

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 10/10

5:00 pm-11:05 pm

2 stops25h 05m

Belfast Intl

Tue 10/14

7:25 am-3:20 pm

3 stops36h 55m

$792

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Fri 10/24

8:30 pm-9:10 pm

2 stops19h 40m

Belfast Intl

Fri 10/31

10:35 am-7:40 pm

2 stops13h 05m

$797

Washington, D.C.Belfast

DCA - BFS

DCABFS

Washington, D.C. Reagan-National

Fri 9/26

11:10 am-3:05 pm

2 stops22h 55m

Belfast Intl

Thu 10/9

6:10 am-10:06 am

2 stops32h 56m

$885

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Sat 10/25

8:40 pm-3:40 pm

2 stops14h 00m

Belfast Intl

Sat 11/1

6:55 am-7:40 pm

2 stops16h 45m

$935

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 9/26

5:50 pm-1:30 pm

1 stop14h 40m

Belfast Intl

Thu 10/9

7:10 am-8:50 pm

2 stops18h 40m

$1,016

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Fri 10/17

9:41 pm-9:45 am

2 stops55h 04m

$279

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Fri 10/17

10:20 pm-8:00 am

2 stops28h 40m

$299

Washington, D.C.Belfast

DCA - BFS

DCABFS

Washington, D.C. Reagan-National

Fri 10/17

6:05 am-10:35 pm

3 stops35h 30m

$376

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Washington, D.C. to Belfast Intl

Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Washington, D.C. 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. to Belfast Intl Airport

How much does it cost to fly round-trip from Washington, D.C. to Belfast Intl Airport?

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 September 11, 2025.
Get a feel of what it's like to fly with British Airways from Washington, D.C. to Belfast Intl Airport by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,361 reviews

Overall

6.7

Comfort

6.7

Boarding

6.9

Crew

7.6

Food

6.3

Entertainment

6.4

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
7,361 reviews
British Airways
6.7
Okay
7,361 reviews

Overall

6.7

Comfort

6.7

Boarding

6.9

Crew

7.6

Food

6.3

Entertainment

6.4

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 Washington, D.C. 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. to Belfast Intl Airport round-trip?

    British Airways, at $634, was found to be the cheapest airline from Washington, D.C. to Belfast Intl Airport.. This flight start at 16% lower than the current average price 3 months from now.

  • What are the most popular routes from Washington, D.C. to Belfast Intl Airport?

    Most travelers choose Washington, D.C. Dulles Intl - Belfast Intl, Baltimore/Washington - Belfast Intl or Washington, D.C. Reagan-National - Belfast Intl when deciding on the best route from Washington, D.C. to Belfast Intl Airport.

  • Can I find deals for flights from Washington, D.C. to Belfast Intl that include hotel bookings?

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

  • How can I find direct flights from Washington, D.C. to Belfast Intl?

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

  • Can I find deals for business class flights from Washington, D.C. to Belfast Intl?

    Yes. Cheapflights offers flight deals from Washington, D.C. 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.

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

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Belfast Intl Airport (average of $657). Flying from Washington, D.C. to Belfast Intl Airport 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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Alternative routes for Washington, D.C. to Belfast Intl

See prices for flight routes from nearby airports that may be better suited for you.
Dulles Intl to Belfast Intl flights
Reagan-National to Belfast City flights
Dulles Intl to Belfast City flights

Top airline flying from Washington, D.C. to Belfast Intl

Discover the top airline that operate flights from Washington, D.C. 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$634Average$861FlexibilityNo cancel feeOn-time70%

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