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$365+ 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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
Dec 12 — Dec 191
Fri 12/12
Fri 12/19
1 adult, Economy
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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 November 12, 2025.

This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/116:20 pmIAD - BHD
1 stop19h 30mAmerican Airlines
Thu 12/186:35 amBHD - IAD
1 stop14h 00mAmerican Airlines
Deal found 11/11$640
This American Airlines deal was found by Cheapflights users on 11/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/112:16 pmIAD - BHD
2 stops15h 14mAmerican Airlines
Tue 11/188:45 amBHD - IAD
2 stops19h 22mAmerican Airlines
Deal found 11/10$644
This American Airlines deal was found by Cheapflights users on 11/10. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:25 pmBWI - BHD
2 stops16h 20mAmerican Airlines
Tue 11/1810:00 amBHD - BWI
2 stops18h 35mAmerican Airlines
Deal found 11/10$644
This Air France deal was found by Cheapflights users on 11/10. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/116:05 pmIAD - BHD
1 stop17h 45mMultiple Airlines
Tue 11/186:30 amBHD - IAD
1 stop14h 35mMultiple Airlines
Deal found 11/10$651
This Air France deal was found by Cheapflights users on 11/12. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/266:05 pmIAD - BHD
1 stop17h 45mMultiple Airlines
Wed 12/35:20 pmBHD - IAD
1 stop27h 45mMultiple Airlines
Deal found 11/12$653
This KLM deal was found by Cheapflights users on 11/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/117:21 pmIAD - BHD
2 stops16h 29mKLM
Tue 11/185:20 pmBHD - IAD
1 stop27h 45mKLM
Deal found 11/10$656
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/16:05 pmIAD - BHD
1 stop17h 45mDelta
Sun 12/145:20 pmBHD - IAD
2 stops34h 48mDelta
Deal found 11/11$659
This Delta deal was found by Cheapflights users on 11/11. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:03 pmDCA - BHD
2 stops18h 47mDelta
Sun 12/145:20 pmBHD - DCA
2 stops29h 39mDelta
Deal found 11/11$659
This Delta deal was found by Cheapflights users on 11/10. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2812:11 pmIAD - BHD
2 stops23h 39mDelta
Fri 12/56:30 amBHD - IAD
2 stops16h 51mDelta
Deal found 11/10$666
This Air France deal was found by Cheapflights users on 11/10. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/41:52 pmBWI - BHD
2 stops21h 58mMultiple Airlines
Mon 12/86:30 amBHD - BWI
2 stops17h 32mMultiple Airlines
Deal found 11/10$666
This Delta deal was found by Cheapflights users on 11/9. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/122:59 pmDCA - BHD
2 stops20h 51mDelta
Sun 11/165:20 pmBHD - DCA
2 stops28h 15mDelta
Deal found 11/9$666
This Delta deal was found by Cheapflights users on 11/12. 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 11/264:35 pmDCA - BHD
2 stops19h 15mDelta
Wed 12/36:30 amBHD - DCA
2 stops17h 10mDelta
Deal found 11/12$667

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 November 12, 2025.

Round-trip from

$630
(Cheapflightsfares)

One-way from

$365
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$705
From Washington, D.C. (WAS) to Belfast
Search Deals
One-way flight from Washington, D.C. (WAS) to Belfast
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($196 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($44 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
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 November 12, 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

Thu 3/5

9:45 pm-4:40 pm

1 stop13h 55m

Belfast City

Thu 3/12

11:05 am-8:55 pm

1 stop13h 50m

$630

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 3/16

10:45 pm-2:15 pm

1 stop11h 30m

Belfast City

Sun 3/22

5:35 pm-4:35 pm

1 stop27h 00m

$642

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 12/4

6:05 pm-4:50 pm

1 stop17h 45m

Belfast City

Mon 12/8

5:20 pm-4:05 pm

1 stop27h 45m

$651

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 11/26

6:05 pm-4:50 pm

1 stop17h 45m

Belfast City

Wed 12/3

5:20 pm-4:05 pm

1 stop27h 45m

$651

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Mon 3/16

4:04 pm-10:40 am

2 stops14h 36m

Belfast City

Sun 3/22

9:10 am-8:00 pm

2 stops14h 50m

$653

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Fri 11/28

12:11 pm-4:50 pm

2 stops23h 39m

Belfast City

Fri 12/5

6:30 am-4:05 pm

1 stop14h 35m

$656

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 12/1

6:05 pm-4:50 pm

1 stop17h 45m

Belfast City

Sun 12/14

5:20 pm-11:08 pm

2 stops34h 48m

$659

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Mon 12/1

5:03 pm-4:50 pm

2 stops18h 47m

Belfast City

Sun 12/14

5:20 pm-5:59 pm

2 stops29h 39m

$659

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 3/16

7:59 pm-4:50 pm

2 stops16h 51m

Belfast City

Sun 3/22

6:30 am-5:05 pm

1 stop14h 35m

$665

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 3/5

12:23 pm-4:50 pm

2 stops23h 27m

Belfast City

Thu 3/12

6:30 am-5:05 pm

1 stop14h 35m

$665

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 31 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

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

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 November 12, 2025.
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
7,515 reviews

Overall

6.7

Boarding

6.9

Comfort

6.7

Entertainment

6.4

Food

6.3

Crew

7.6

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
7,515 reviews
British Airways
6.7
Okay
7,515 reviews

Overall

6.7

Boarding

6.9

Comfort

6.7

Entertainment

6.4

Food

6.3

Crew

7.6

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. 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 British Airways, American Airlines, and Delta fly from Washington, D.C. to Belfast in about 13h 55m. The time it takes to get you to your destination can typically vary by up to 4h 52m. The distance between Washington, D.C. and Belfast is about 3390 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 $620. You may be able to fly from Washington, D.C. to Belfast for 21% less than the average price by searching for this airline.

  • 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.

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 November 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$620Average$854FlexibilityNo cancel feeOn-time70%

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