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

Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Northern Ireland (average of £67). Flying from Washington, D.C. to Northern Ireland in July is currently the most expensive (average of £90). 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.

In terms of precipitation, rainfall in Northern Ireland ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Northern Ireland when rainfall is around 50.0 mm.

If weather is an important factor for your trip to Northern Ireland, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).

What are the most popular routes from Washington, D.C. to Northern Ireland?

While some choose either Washington, D.C. Dulles Intl - Belfast City or Baltimore/Washington - Belfast Intl, Washington, D.C. Dulles Intl - Belfast Intl is the most popular route from Washington, D.C. to Northern Ireland.

What is the cheapest month to fly from Washington, D.C. to Northern Ireland?

Flights from Washington, D.C. to Northern Ireland lean towards being more expensive in June. Prices are generally better when you fly from Washington, D.C. to Northern Ireland in February, with the cheapest ticket starting at £447.

What is the cheapest time of day to fly from WAS to NIR?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Washington, D.C. to Northern Ireland as you normally would.

How can I find direct flights from Washington, D.C. to Northern Ireland?

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 Northern Ireland.

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

Yes. Cheapflights offers flight deals from Washington, D.C. to Northern Ireland by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£218+ Cheap Flights from Washington, D.C. to Northern Ireland

Cheap flight deals from Washington, D.C. to Northern Ireland

Round-trip from	£457
One-way from	£218
Popular in	June
Cheapest in	February
Average price	£456

British Airways
22/10-27/10
3 total stops
37h 35m total
Washington, D.C. to Northern Ireland

Search Deals

13/9
3 total stops
32h 35m total
Washington, D.C. to Northern Ireland

Search Deals

Highest demand for flights based on searches. 22% potential increase in price (£117 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 6% potential price decrease (£24 potential savings vs. average return price).

Search Deals

Average for round-trip flights in August 2025

Search Deals

Find flight deals from Washington, D.C. to Northern Ireland

Cheapest flights from Washington, D.C. to Northern Ireland
Explore the most affordable flight options available from Washington, D.C. to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 August 2025.

Wed 22/1019:25IAD - BHD

1 stop11h 30mBritish Airways

Mon 27/1019:25BHD - IAD

2 stops26h 05mBritish Airways

Deal found 12/8£457

Wed 1/1022:45IAD - BHD

1 stop11h 50mBritish Airways

Mon 6/1012:15BHD - IAD

1 stop13h 00mBritish Airways

Deal found 13/8£460

Mon 8/1214:04IAD - BHD

2 stops15h 36mBritish Airways

Sun 21/1209:10BHD - IAD

1 stop11h 25mBritish Airways

Deal found 12/8£464

Sat 18/1013:31BWI - BHD

2 stops17h 44mBritish Airways

Thu 30/1010:40BHD - BWI

1 stop13h 05mBritish Airways

Deal found 13/8£464

Wed 12/1118:20IAD - BHD

1 stop9h 50mBritish Airways

Sun 16/1106:30BHD - IAD

1 stop18h 25mBritish Airways

Deal found 13/8£465

Sat 6/922:45IAD - BHD

1 stop29h 20mBritish Airways

Sat 20/1218:00BHD - IAD

1 stop26h 35mBritish Airways

Deal found 12/8£468

Wed 1/1018:50BWI - BFS

2 stops23h 20mMultiple Airlines

Mon 6/1006:45BFS - BWI

2 stops15h 55mMultiple Airlines

Deal found 13/8£468

Sat 18/1022:50IAD - BHD

1 stop11h 15mBritish Airways

Thu 30/1006:35BHD - IAD

2 stops16h 19mBritish Airways

Deal found 13/8£473

Sat 18/1010:45BWI - BHD

2 stops20h 30mAmerican Airlines

Thu 30/1006:35BHD - BWI

2 stops18h 13mAmerican Airlines

Deal found 13/8£474

Mon 8/1215:59DCA - BHD

2 stops13h 41mAmerican Airlines

Sun 21/1209:10BHD - DCA

2 stops15h 52mAmerican Airlines

Deal found 12/8£474

Wed 1/1017:50IAD - BFS

2 stops23h 10mMultiple Airlines

Mon 6/1006:45BFS - IAD

3 stops43h 05mMultiple Airlines

Deal found 13/8£477

Tue 14/1014:18IAD - BHD

2 stops20h 02mBritish Airways

Fri 24/1006:35BHD - IAD

1 stop18h 40mBritish Airways

Deal found 13/8£477

Best flights from Washington, D.C. to Northern Ireland
Discover carefully curated flight deals from Washington, D.C. to Northern Ireland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 14 August 2025.

Wed 22/1019:25IAD - BHD

1 stop11h 30mBritish Airways

Mon 27/1019:25BHD - IAD

2 stops26h 05mBritish Airways

Deal found 12/8£457

Wed 1/1018:50BWI - BFS

2 stops23h 20mMultiple Airlines

Mon 6/1006:45BFS - BWI

2 stops15h 55mMultiple Airlines

Deal found 13/8£468

Sat 18/1010:45BWI - BHD

2 stops20h 30mAmerican Airlines

Thu 30/1006:35BHD - BWI

2 stops18h 13mAmerican Airlines

Deal found 13/8£474

Wed 12/1117:00DCA - BHD

2 stops18h 50mVirgin Atlantic

Sun 16/1106:30BHD - DCA

2 stops15h 57mVirgin Atlantic

Deal found 11/8£612

Wed 19/1117:15DCA - BHD

2 stops18h 35mDelta

Sun 23/1117:20BHD - DCA

2 stops28h 12mDelta

Deal found 12/8£612

Wed 1/1022:45IAD - BHD

1 stop11h 50mBritish Airways

Mon 6/1012:15BHD - IAD

1 stop13h 00mBritish Airways

Deal found 13/8£460

Mon 8/1215:59DCA - BHD

2 stops13h 41mAmerican Airlines

Sun 21/1209:10BHD - DCA

2 stops15h 52mAmerican Airlines

Deal found 12/8£474

Wed 1/1017:50IAD - BFS

2 stops23h 10mMultiple Airlines

Mon 6/1006:45BFS - IAD

3 stops43h 05mMultiple Airlines

Deal found 13/8£477

Tue 14/1019:25IAD - BHD

1 stop12h 35mBritish Airways

Fri 24/1006:35BHD - IAD

1 stop18h 40mBritish Airways

Deal found 13/8£460

Fri 26/917:00IAD - BFS

3 stops24h 35mMultiple Airlines

Fri 3/1021:40BFS - IAD

3 stops46h 40mMultiple Airlines

Deal found 12/8£501

Sat 18/1019:25IAD - BHD

1 stop14h 40mBritish Airways

Thu 30/1006:35BHD - IAD

1 stop14h 00mBritish Airways

Deal found 13/8£460

Thu 9/1022:20IAD - BFS

3 stops18h 20mMultiple Airlines

Mon 13/1021:00BFS - IAD

3 stops28h 50mMultiple Airlines

Deal found 11/8£506

Last-minute flights from Washington, D.C. to Northern Ireland
Discover last-minute flight deals from Washington, D.C. to Northern Ireland. Data last updated 14 August 2025 and is based on user searches.

Sat 23/818:50BWI - BFS

2 stops23h 35mMultiple Airlines

Fri 29/806:15BFS - BWI

2 stops16h 25mMultiple Airlines

Deal found 12/8£542

Sat 23/820:30IAD - BFS

2 stops14h 00mMultiple Airlines

Fri 29/807:35BFS - IAD

2 stops16h 45mMultiple Airlines

Deal found 12/8£601

Mon 1/922:40IAD - BHD

1 stop12h 00mBritish Airways

Mon 15/915:25BHD - IAD

2 stops28h 35mBritish Airways

Deal found 13/8£480

Mon 1/917:38BWI - BHD

2 stops17h 02mBritish Airways

Mon 8/919:30BHD - BWI

2 stops31h 02mBritish Airways

Deal found 11/8£483

Mon 1/914:55DCA - BFS

2 stops18h 25mMultiple Airlines

Mon 15/920:15BFS - DCA

2 stops32h 26mMultiple Airlines

Deal found 13/8£538

Mon 1/922:25IAD - BFS

1 stop19h 35mMultiple Airlines

Mon 15/919:10BFS - IAD

1 stop25h 20mMultiple Airlines

Deal found 13/8£539

Sat 6/922:45IAD - BHD

1 stop29h 20mBritish Airways

Sat 20/1218:00BHD - IAD

1 stop26h 35mBritish Airways

Deal found 12/8£468

Sat 6/917:08DCA - BHD

2 stops21h 07mBritish Airways

Sat 20/1209:15BHD - DCA

2 stops19h 42mBritish Airways

Deal found 12/8£483

Thu 11/918:52BWI - BHD

2 stops19h 28mBritish Airways

Tue 16/920:20BHD - BWI

2 stops26h 21mBritish Airways

Deal found 11/8£491

Thu 11/922:20IAD - BFS

3 stops18h 20mMultiple Airlines

Sun 14/907:15BFS - IAD

3 stops37h 05mMultiple Airlines

Deal found 12/8£545

Thu 11/919:25IAD - BHD

1 stop32h 25mBritish Airways

Sun 14/911:00BHD - IAD

1 stop14h 15mBritish Airways

Deal found 12/8£556

Fri 26/917:00IAD - BFS

3 stops24h 35mMultiple Airlines

Fri 3/1021:40BFS - IAD

3 stops46h 40mMultiple Airlines

Deal found 12/8£501

One-way flights from Washington, D.C. to Northern Ireland
Search for one-way flight options from Washington, D.C. to Northern Ireland. Find affordable one-way fares based on user searches. Data last updated 14 August 2025.

Sat 13/922:35IAD - BFS

3 stops32h 35mMultiple Airlines

Deal found 12/8£218

Sat 13/918:50BWI - BFS

2 stops22h 40mMultiple Airlines

Deal found 12/8£224

Fri 5/923:15IAD - BFS

3 stops52h 45mMultiple Airlines

Deal found 13/8£270

Mon 22/919:25IAD - BHD

1 stop12h 30mBritish Airways

Deal found 12/8£281

Fri 5/920:14BWI - BFS

3 stops41h 51mMultiple Airlines

Deal found 13/8£323

Mon 22/921:35BWI - BHD

1 stop10h 20mBritish Airways

Deal found 12/8£426

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 22/10

19:25-11:55

1 stop11h 30m

Belfast City

Mon 27/10

19:25-17:30

2 stops26h 05m

£457

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 1/10

22:45-15:35

1 stop11h 50m

Belfast City

Mon 6/10

12:15-20:15

1 stop13h 00m

£460

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Tue 14/10

19:25-13:00

1 stop12h 35m

Belfast City

Fri 24/10

06:35-20:15

1 stop18h 40m

£460

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Sat 18/10

19:25-15:05

1 stop14h 40m

Belfast City

Thu 30/10

06:35-16:35

1 stop14h 00m

£460

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Mon 8/12

21:45-14:15

1 stop11h 30m

Belfast City

Sun 21/12

09:10-15:35

1 stop11h 25m

£461

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 8/12

20:16-16:05

2 stops14h 49m

Belfast City

Sun 21/12

10:40-18:45

1 stop13h 05m

£464

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Sat 18/10

13:31-12:15

2 stops17h 44m

Belfast City

Thu 30/10

10:40-19:45

1 stop13h 05m

£464

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Thu 9/10

22:45-15:30

1 stop11h 45m

Belfast City

Mon 13/10

12:15-20:15

1 stop13h 00m

£465

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 12/11

18:20-09:10

1 stop9h 50m

Belfast City

Sun 16/11

12:10-19:55

1 stop12h 45m

£465

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Wed 1/10

18:50-23:10

2 stops23h 20m

Belfast Intl

Mon 6/10

06:45-17:40

2 stops15h 55m

£468

Flights are sorted by cheapest return flights first.

Deals found on 12/8

Showing 1-10 of 36 results

Best time to book a flight from Washington, D.C. to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Washington, D.C. with our price prediction graph.

Estimated return 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 Northern Ireland

No data available for this route at this time. Please check back soon.

Related info for your journey

What are the most popular routes from Washington, D.C. to Northern Ireland?
While some choose either Washington, D.C. Dulles Intl - Belfast City or Baltimore/Washington - Belfast Intl, Washington, D.C. Dulles Intl - Belfast Intl is the most popular route from Washington, D.C. to Northern Ireland.
Can I find deals for flights from Washington, D.C. to Northern Ireland that include hotel bookings?
Yes. In addition to deals on Washington, D.C. to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Washington, D.C. to Northern Ireland?
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 Northern Ireland.
Can I find deals for business class flights from Washington, D.C. to Northern Ireland?
Yes. Cheapflights offers flight deals from Washington, D.C. to Northern Ireland 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 Northern Ireland?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Northern Ireland (average of £67). Flying from Washington, D.C. to Northern Ireland in July is currently the most expensive (average of £90). 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.

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Alternative routes for Washington, D.C. to Northern Ireland

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Dulles Intl to Newcastle upon Tyne flights

Dulles Intl to Bristol flights

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Dulles Intl to Cardiff flights

Reagan-National to Bristol flights

Dulles Intl to Aberdeen flights

Dulles Intl to East Midlands flights

Dulles Intl to Exeter flights

Dulles Intl to Bournemouth flights

Direct flights to United Kingdom

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Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington, D.C. to Northern Ireland. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Northern Ireland?

Millions of users choose and trust Cheapflights to book the best flight deals from Washington, D.C. to Northern Ireland for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Washington, D.C. to Northern Ireland with no change fees?

Yes, we can. To see specific flights from Washington, D.C. to Northern Ireland with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Washington, D.C. to Northern Ireland become cheaper?

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Cheap flights from Washington, D.C. to Northern Ireland from £218

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 13/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Washington, D.C. to Northern Ireland

Keep the following information in mind while searching for Washington, D.C. to Northern Ireland flight deals. Data was last updated 14 August 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Washington, D.C. to Northern Ireland

Cheapest flights from Washington, D.C. to Northern IrelandExplore the most affordable flight options available from Washington, D.C. to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 August 2025.

Explore the most affordable flight options available from Washington, D.C. to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 August 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. to Northern Ireland that are best for you.

Best time to book a flight from Washington, D.C. to Northern Ireland

Have a flexible travel schedule? Discover the best time to fly to Northern Ireland from Washington, D.C. with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. to Northern Ireland

Related info for your journey

Find useful and relevant information for your journey from Washington, D.C. to Northern Ireland. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What are the most popular routes from Washington, D.C. to Northern Ireland?

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

How can I find direct flights from Washington, D.C. to Northern Ireland?

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

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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Washington, D.C. to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.

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How does Cheapflights help users find flights from Washington, D.C. to Northern Ireland?

Why should you use Cheapflights to find cheap flight tickets from Washington, D.C. to Northern Ireland?

Can Cheapflights find flights from Washington, D.C. to Northern Ireland with no change fees?

Can Cheapflights notify me if prices for flights from Washington, D.C. to Northern Ireland become cheaper?

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Cheapest flights from Washington, D.C. to Northern Ireland
Explore the most affordable flight options available from Washington, D.C. to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 August 2025.