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$630+ Cheap flights from Washington, D.C. (WAS) to Belfast

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/3. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — BHD
Oct 16 — Oct 231
Thu 10/16
Thu 10/23
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 September 16, 2025.

Round-trip from

$630
(American Airlines)

Popular in

June

Cheapest in

February

Average price

$647
From Washington, D.C. (WAS) to Belfast
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Highest demand for flights based on searches. 20% potential increase in price ($194 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($42 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

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 September 16, 2025.

This American Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 10/310:45 pmIAD - BHD
1 stop14h 30mAmerican Airlines
Fri 10/1011:55 amBHD - IAD
1 stop13h 20mAmerican Airlines
Deal found 9/15$630
This Mytrip deal was found by Cheapflights users on 9/15. 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 10/135:45 pmIAD - BFS
3 stops25h 00mMultiple Airlines
Mon 10/209:00 pmBFS - IAD
3 stops47h 20mMultiple Airlines
Deal found 9/15$645
This American Airlines deal was found by Cheapflights users on 9/15. 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.
Fri 10/37:45 pmDCA - BHD
2 stops17h 30mAmerican Airlines
Fri 10/106:35 amBHD - DCA
2 stops16h 21mAmerican Airlines
Deal found 9/15$645
This Delta deal was found by Cheapflights users on 9/16. 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 10/65:25 pmIAD - BHD
1 stop18h 30mDelta
Mon 10/206:30 amBHD - IAD
1 stop14h 05mDelta
Deal found 9/16$708
This KLM deal was found by Cheapflights users on 9/16. 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.
Mon 10/67:35 pmIAD - BHD
2 stops16h 20mKLM
Mon 10/206:30 amBHD - IAD
1 stop14h 05mKLM
Deal found 9/16$709
This Delta deal was found by Cheapflights users on 9/14. 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 11/1212:11 pmIAD - BHD
2 stops27h 49mDelta
Sun 11/165:20 pmBHD - IAD
1 stop27h 45mDelta
Deal found 9/14$712
This Mytrip deal was found by Cheapflights users on 9/16. 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 10/3110:00 pmIAD - BFS
2 stops20h 00mMultiple Airlines
Fri 11/78:05 amBFS - IAD
2 stops16h 25mMultiple Airlines
Deal found 9/16$713
This Delta deal was found by Cheapflights users on 9/16. 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 10/69:00 amBWI - BHD
2 stops31h 15mDelta
Mon 10/205:25 pmBHD - BWI
2 stops29h 09mDelta
Deal found 9/16$715
This FlightHub deal was found by Cheapflights users on 9/15. 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.
Mon 10/1312:19 pmDCA - BHD
2 stops19h 36mBritish Airways
Mon 10/206:40 amBHD - DCA
2 stops18h 36mBritish Airways
Deal found 9/15$721
This Delta deal was found by Cheapflights users on 9/15. 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 10/134:44 pmBWI - BHD
2 stops19h 11mDelta
Mon 10/206:30 amBHD - BWI
2 stops21h 32mDelta
Deal found 9/15$722
This Virgin Atlantic deal was found by Cheapflights users on 9/14. 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 11/125:03 pmDCA - BHD
2 stops18h 47mVirgin Atlantic
Sun 11/166:30 amBHD - DCA
2 stops18h 23mVirgin Atlantic
Deal found 9/14$722
This Mytrip deal was found by Cheapflights users on 9/15. 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 10/136:50 pmBWI - BFS
2 stops18h 55mMultiple Airlines
Mon 10/2010:00 pmBFS - BWI
3 stops24h 40mMultiple Airlines
Deal found 9/15$735

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 September 16, 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

Fri 10/3

10:45 pm-6:15 pm

1 stop14h 30m

Belfast City

Fri 10/10

11:55 am-8:15 pm

1 stop13h 20m

$630

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 1/6

6:20 pm-10:30 am

1 stop11h 10m

Belfast City

Wed 1/14

12:25 pm-7:55 pm

1 stop12h 30m

$634

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 10/13

5:45 pm-11:45 pm

3 stops25h 00m

Belfast Intl

Mon 10/20

9:00 pm-3:20 pm

3 stops47h 20m

$645

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Fri 10/3

7:45 pm-6:15 pm

2 stops17h 30m

Belfast City

Fri 10/10

6:35 am-5:56 pm

2 stops16h 21m

$645

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Tue 1/6

4:30 pm-11:30 am

2 stops14h 00m

Belfast City

Wed 1/14

6:35 am-4:27 pm

2 stops14h 52m

$647

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 10/6

5:25 pm-4:55 pm

1 stop18h 30m

Belfast City

Mon 10/20

6:30 am-3:35 pm

1 stop14h 05m

$708

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 10/13

5:25 pm-4:55 pm

1 stop18h 30m

Belfast City

Mon 10/20

5:25 pm-3:35 pm

1 stop27h 10m

$708

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 11/12

5:03 pm-9:00 pm

2 stops22h 57m

Belfast City

Sun 11/16

6:30 am-4:05 pm

1 stop14h 35m

$712

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 11/12

12:11 pm-9:00 pm

2 stops27h 49m

Belfast City

Sun 11/16

5:20 pm-4:05 pm

1 stop27h 45m

$712

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 10/13

7:35 pm-4:55 pm

2 stops16h 20m

Belfast City

Mon 10/20

6:30 am-3:35 pm

1 stop14h 05m

$712

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/15

Showing 1-10 of 30 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
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 September 16, 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
7,363 reviews

Food

6.3

Comfort

6.7

Entertainment

6.4

Boarding

6.9

Overall

6.7

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
7,363 reviews
British Airways
6.7
Okay
7,363 reviews

Food

6.3

Comfort

6.7

Entertainment

6.4

Boarding

6.9

Overall

6.7

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 American Airlines, British Airways, and Delta fly from Washington, D.C. to Belfast in about 11h 10m. The time it takes to get you to your destination can typically vary by up to 7h 20m. 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 20% 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, Washington, D.C. Dulles Intl - Belfast City or Washington, D.C. Reagan-National - 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
Reagan-National to Belfast Intl flights
Dulles Intl to Belfast City 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 September 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$620Average$847FlexibilityNo cancel feeOn-time70%

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