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$245+ Cheap flights from Washington, D.C. (WAS) 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 4/15. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
Apr 9 — Apr 161
Thu 4/9
Thu 4/16
1 adult, Economy
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Cheap flight deals from Washington, D.C. to Belfast

Cheapest flights from Washington, D.C. to Belfast
Explore the most affordable flight options available from Washington, D.C. to Belfast. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 10, 2026.

This Trip.com deal was found by Cheapflights users on 3/6. 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.
Mon 4/208:30 pm
IAD
-
BFS
2 stops18h 55m
Multiple Airlines
Mon 4/278:15 am
BFS
-
IAD
2 stops40h 05m
Multiple Airlines
Deal found 3/6$685
This KLM deal was found by Cheapflights users on 3/5. 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.
Thu 3/56:05 pm
IAD
-
BHD
1 stop21h 55m
KLM
Thu 3/125:20 pm
BHD
-
IAD
1 stop27h 45m
KLM
Deal found 3/5$686
This Mytrip deal was found by Cheapflights users on 3/6. 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.
Wed 5/68:30 pm
IAD
-
BFS
3 stops20h 50m
Multiple Airlines
Wed 5/138:30 am
BFS
-
IAD
3 stops41h 05m
Multiple Airlines
Deal found 3/6$697
This Mytrip deal was found by Cheapflights users on 3/8. 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.
Wed 4/228:30 pm
IAD
-
BFS
3 stops20h 50m
Multiple Airlines
Wed 4/298:15 pm
BFS
-
IAD
3 stops29h 20m
Multiple Airlines
Deal found 3/8$700
This Mytrip deal was found by Cheapflights users on 3/8. 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.
Wed 4/228:30 pm
BWI
-
BFS
3 stops20h 50m
Multiple Airlines
Wed 4/298:15 pm
BFS
-
BWI
3 stops28h 10m
Multiple Airlines
Deal found 3/8$705
This Mytrip deal was found by Cheapflights users on 3/7. 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.
Mon 4/138:30 pm
IAD
-
BFS
3 stops21h 50m
Multiple Airlines
Sun 4/266:20 am
BFS
-
IAD
2 stops17h 40m
Multiple Airlines
Deal found 3/7$710
This Ticket deal was found by Cheapflights users on 3/9. 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:15 pm
IAD
-
BHD
1 stop14h 15m
British Airways
Sun 4/267:10 pm
BHD
-
IAD
1 stop27h 05m
British Airways
Deal found 3/9$719
This Cheapflightsfares deal was found by Cheapflights users on 3/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/1410:25 pm
IAD
-
BHD
1 stop12h 05m
British Airways
Wed 12/1612:25 pm
BHD
-
IAD
1 stop12h 30m
British Airways
Deal found 3/5$721
This Cheapflightsfares deal was found by Cheapflights users on 3/5. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/149:30 pm
BWI
-
BHD
1 stop13h 00m
British Airways
Wed 12/1611:25 am
BHD
-
BWI
1 stop12h 20m
British Airways
Deal found 3/5$721
This deal was found by Cheapflights users on 3/6. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/110:25 pm
IAD
-
BHD
1 stop14h 45m
British Airways
Mon 5/49:40 am
BHD
-
IAD
1 stop15h 40m
British Airways
Deal found 3/6$722
This oojo deal was found by Cheapflights users on 3/6. 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.
Wed 5/67:15 pm
IAD
-
BHD
1 stop11h 45m
British Airways
Wed 5/138:35 pm
BHD
-
IAD
1 stop25h 50m
British Airways
Deal found 3/6$726
This British Airways deal was found by Cheapflights users on 3/8. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/139:30 pm
BWI
-
BHD
1 stop13h 00m
British Airways
Sun 4/268:10 pm
BHD
-
BWI
1 stop28h 30m
British Airways
Deal found 3/8$733

Find flight deals from Washington, D.C. to Belfast

Discover tips and strategies to find the most affordable flight options for your journey from Washington, D.C. (WAS) 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 10, 2026.

Round-trip from

$685
(Trip.com)

One-way from

$245
(Kiwi.com)
From Washington, D.C. (WAS) to Belfast
Search Deals
One-way flight from Washington, D.C. (WAS) to Belfast
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington, D.C. 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 10, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Belfast 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

Mon 4/20

8:30 pm-8:25 pm

2 stops18h 55m

Belfast Intl

Mon 4/27

8:15 am-7:20 pm

2 stops40h 05m

$685

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Wed 4/22

8:30 pm-10:20 pm

3 stops20h 50m

Belfast Intl

Wed 4/29

8:15 pm-7:25 pm

3 stops28h 10m

$705

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 4/13

9:30 pm-3:30 pm

1 stop13h 00m

Belfast City

Sun 4/26

8:10 pm-7:40 pm

1 stop28h 30m

$733

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Wed 5/6

8:30 pm-5:05 pm

2 stops15h 35m

Belfast Intl

Wed 5/13

8:30 am-3:10 pm

3 stops35h 40m

$764

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Wed 5/6

12:59 pm-9:20 am

2 stops15h 21m

Belfast City

Wed 5/13

9:50 am-8:45 pm

2 stops15h 55m

$765

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Sun 4/19

8:30 pm-10:35 pm

3 stops21h 05m

Belfast Intl

Sun 4/26

10:10 pm-3:10 pm

3 stops46h 00m

$770

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sat 8/1

5:40 pm-10:05 am

1 stop11h 25m

Belfast City

Tue 8/18

6:30 am-7:40 pm

1 stop18h 10m

$782
Quickest round-trip

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 8/3

9:30 pm-12:55 pm

1 stop10h 25m

Belfast City

Wed 8/12

10:05 am-5:15 pm

1 stop12h 10m

$782

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 8/3

9:30 pm-12:55 pm

1 stop10h 25m

Belfast City

Tue 8/18

8:25 pm-5:15 pm

1 stop25h 50m

$809

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 4/2

5:40 pm-9:20 am

1 stop10h 40m

Belfast City

Tue 4/7

9:50 am-10:59 pm

2 stops18h 09m

$815

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 60 resultsSorted by cheapest first
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Best time to book a flight from Washington, D.C. to Belfast

Have a flexible travel schedule? Discover the best time to fly to Belfast 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
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 March 10, 2026.
Peruse reviews from past customers who have flown with British Airways 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.
British Airways
6.7
Okay
7,781 reviews

Overall

6.7

Crew

7.6

Entertainment

6.4

Boarding

6.9

Comfort

6.8

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Natasha,Feb 2026

SEA - LHR

I already said the thing about the list luggage, which actually this flight.
British Airways
6.7
Okay
7,781 reviews
British Airways
6.7
Okay
7,781 reviews

Overall

6.7

Crew

7.6

Entertainment

6.4

Boarding

6.9

Comfort

6.8

Food

6.4

Reviews

1 / 20
2.0
Mediocre

Natasha,Feb 2026

SEA - LHR

I already said the thing about the list luggage, which actually this flight.

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. 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. to Belfast?

    Airlines like KLM, British Airways, and American Airlines fly from Washington, D.C. to Belfast in about 13h 48m. The time it takes to get you to your destination can typically vary by up to 1h 32m. The distance between Washington, D.C. and Belfast is about 3378 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    Cheapflights users have booked flights from Washington, D.C. to Belfast round-trip from $627.

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

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

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

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

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

    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.

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

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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington, D.C. to Belfast

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

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

Discover the top airline that operate flights from Washington, D.C. 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 10, 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$627Average$830FlexibilityNo cancel feeOn-time70%

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