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$329+ 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 7/14. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
Jul 7 — Jul 141
Mon 7/7
Mon 7/14
1 adult, Economy
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Cheap 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 July 2, 2025.

Round-trip from

$635
(British Airways)

One-way from

$329
(Kiwi.com)

Popular in

June

Cheapest in

August

Average price

$1,023
From Washington, D.C. (WAS) to Belfast
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One-way flight from Washington, D.C. (WAS) to Belfast
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Highest demand for flights based on searches. 22% potential increase in price ($219 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 July 2025
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Find 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 July 2, 2025.

This Justfly.com deal was found by Cheapflights users on 6/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/289:30 pmBWI - BHD
1 stop13h 25mBritish Airways
Sun 11/29:10 amBHD - BWI
1 stop14h 35mBritish Airways
Deal found 6/30$624
This Trip.com deal was found by Cheapflights users on 7/1. 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 10/68:30 pmBWI - BFS
2 stops21h 30mMultiple Airlines
Mon 10/1310:35 amBFS - BWI
2 stops37h 50mMultiple Airlines
Deal found 7/1$625
This Cheapflightsfares deal was found by Cheapflights users on 7/1. 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.
Fri 12/126:15 pmIAD - BHD
1 stop11h 15mBritish Airways
Sat 12/209:10 amBHD - IAD
1 stop11h 25mBritish Airways
Deal found 7/1$632
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/285:30 pmDCA - BHD
2 stops14h 00mAmerican Airlines
Sun 11/25:30 amBHD - DCA
2 stops14h 55mAmerican Airlines
Deal found 6/30$648
This Trip.com deal was found by Cheapflights users on 7/1. 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 10/68:30 pmBWI - BHD
2 stops18h 55mMultiple Airlines
Mon 10/132:30 pmBHD - BWI
2 stops33h 55mMultiple Airlines
Deal found 7/1$666
This FlightHub deal was found by Cheapflights users on 7/2. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/61:39 pmDCA - BHD
2 stops17h 36mBritish Airways
Sat 12/206:30 amBHD - DCA
2 stops21h 04mBritish Airways
Deal found 7/2$677
This American Airlines deal was found by Cheapflights users on 7/1. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/315:50 pmIAD - BHD
1 stop10h 30mAmerican Airlines
Thu 8/79:35 amBHD - IAD
2 stops19h 24mAmerican Airlines
Deal found 7/1$694
This Delta deal was found by Cheapflights users on 6/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:35 pmIAD - BHD
1 stop22h 25mDelta
Sun 11/165:20 pmBHD - IAD
1 stop27h 25mDelta
Deal found 6/29$710
This Virgin Atlantic deal was found by Cheapflights users on 6/29. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/125:10 pmIAD - BHD
2 stops18h 40mVirgin Atlantic
Sun 11/165:20 pmBHD - IAD
1 stop27h 25mVirgin Atlantic
Deal found 6/29$715
This Delta deal was found by Cheapflights users on 6/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/287:00 pmBWI - BHD
2 stops17h 50mDelta
Sun 11/25:30 amBHD - BWI
2 stops15h 11mDelta
Deal found 6/30$725
This Virgin Atlantic deal was found by Cheapflights users on 6/29. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/85:15 pmDCA - BHD
2 stops23h 00mVirgin Atlantic
Sun 10/126:30 amBHD - DCA
2 stops20h 49mVirgin Atlantic
Deal found 6/29$725
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/145:38 pmBWI - BHD
2 stops16h 52mAmerican Airlines
Mon 8/189:50 amBHD - BWI
1 stop14h 45mAmerican Airlines
Deal found 6/30$748

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 July 2, 2025.
Use the filters below to find and compare flights from Washington, D.C. to Belfast that are best for you.

Fly from

Washington, D.C.

Fly to

Belfast

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sat 9/6

10:45 pm-3:05 pm

1 stop11h 20m

Belfast City

Sat 12/20

3:05 pm-3:35 pm

1 stop29h 30m

$635

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Sat 9/6

1:39 pm-12:15 pm

2 stops17h 36m

Belfast City

Sat 12/20

6:30 am-10:34 pm

2 stops21h 04m

$677

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Thu 8/14

5:38 pm-3:30 pm

2 stops16h 52m

Belfast City

Mon 8/18

7:30 pm-6:03 pm

2 stops27h 33m

$678

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 7/31

5:50 pm-9:20 am

1 stop10h 30m

Belfast City

Thu 8/7

9:35 am-11:59 pm

2 stops19h 24m

$694

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Wed 7/30

5:05 pm-11:55 am

2 stops13h 50m

Belfast City

Tue 8/5

1:40 pm-11:11 pm

2 stops14h 31m

$699

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Thu 8/14

5:38 pm-3:30 pm

2 stops16h 52m

Belfast City

Mon 8/18

9:50 am-7:35 pm

1 stop14h 45m

$748

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Thu 8/14

10:05 pm-11:30 pm

3 stops20h 25m

Belfast Intl

Thu 8/21

6:00 am-7:59 pm

2 stops18h 59m

$777

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Thu 8/14

8:30 pm-7:45 pm

2 stops18h 15m

Belfast Intl

Thu 8/21

6:00 am-5:40 pm

2 stops16h 40m

$805

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 7/30

8:33 pm-4:55 pm

2 stops15h 22m

Belfast City

Tue 8/5

5:25 pm-3:35 pm

1 stop27h 10m

$840

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 7/30

8:33 pm-9:15 pm

2 stops19h 42m

Belfast City

Tue 8/5

6:30 am-10:55 pm

2 stops21h 25m

$910

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/30

Showing 1-10 of 29 results
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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

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

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

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 July 2, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and American Airlines 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.
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,983 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,366 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Aer Lingus
7.1
Good
1,141 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.6
Okay
7,089 reviews
Delta
8.0
Very good
7,983 reviews

Crew

8.5

Comfort

7.9

Entertainment

7.9

Overall

8.0

Boarding

8.2

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection 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.

  • What are the cheapest airlines flying from Washington, D.C. to Belfast round-trip?

    Cheapflights users have booked flights from Washington, D.C. to Belfast round-trip from $635. Other airlines that can offer you cheap pricing are American Airlines, from $694, and KLM, from $840. You may be able to fly from Washington, D.C. to Belfast for 15% less than the average price by searching for these airlines.

  • What are the cheapest airlines to fly from Washington, D.C. to Belfast one-way?

    $451 is the cheapest one-way deal found within the past few days, from British Airways. You may also be able to find cheap deals on Delta and American Airlines, with prices starting from $2,992 and $3,340, respectively.

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

    Most travelers choose Washington, D.C. Dulles Intl - Belfast Intl, Baltimore/Washington - Belfast Intl or Washington, D.C. Dulles Intl - Belfast City 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.

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

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

Browse thousands of different options on Cheapflights for your next trip

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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
Dulles Intl to Belfast City flights
Reagan-National to Belfast Intl flights
Reagan-National to Belfast City 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 July 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$575Average$844FlexibilityNo cancel feeOn-time70%

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