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

The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $980. However, be on the lookout for offers from American Airlines and KLM, as they are both options that can get you from Northern Ireland to Washington, D.C. for a low price.

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

Currently, August is the cheapest month in which you can book a flight from Northern Ireland to Washington, D.C. (average of $241). Flying from Northern Ireland to Washington, D.C. in March is currently the most expensive (average of $290). 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.

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

The most popular route from Northern Ireland to Washington, D.C. is Belfast Intl - Baltimore/Washington. You may also consider Belfast Intl - Washington, D.C. Dulles Intl or Belfast Intl - Washington, D.C. Reagan-National.

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

When flying from Northern Ireland to Washington, D.C., the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to Washington, D.C..

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

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

$423+ Flights from Northern Ireland to Washington, D.C.

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

Round-trip from	$775 (Mytrip)
One-way from	$423 (Kiwi.com)

From Northern Ireland to Washington, D.C. (WAS)

Search Deals

One-way flight from Northern Ireland to Washington, D.C. (WAS)

Search Deals

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

Cheapest flights from Northern Ireland to Washington, D.C.
Explore the most affordable flight options available from Northern Ireland to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

Mon 5/269:55 pmBFS - IAD

3 stops46h 25mMultiple Airlines

Tue 6/35:12 pmIAD - BFS

2 stops18h 28mMultiple Airlines

Deal found 3/31

$775

Mon 5/267:30 pmBHD - BWI

1 stop29h 05mBritish Airways

Tue 6/39:20 pmBWI - BHD

1 stop13h 00mBritish Airways

Deal found 3/31

$892

Mon 5/266:10 amBFS - BWI

2 stops22h 23mMultiple Airlines

Tue 6/38:30 pmBWI - BFS

2 stops13h 30mMultiple Airlines

Deal found 3/31

$909

Mon 5/267:05 amBHD - BWI

3 stops32h 59mMultiple Airlines

Tue 6/38:30 pmBWI - BHD

2 stops19h 20mMultiple Airlines

Deal found 3/31

$910

Mon 5/266:30 amBHD - DCA

2 stops20h 31mVirgin Atlantic

Tue 6/36:55 pmDCA - BHD

2 stops41h 00mVirgin Atlantic

Deal found 3/31

$984

Mon 5/268:20 amBFS - DCA

2 stops16h 23mMultiple Airlines

Tue 6/36:59 amDCA - BFS

2 stops28h 41mMultiple Airlines

Deal found 3/31

$1,151

Mon 5/266:30 amBHD - BWI

2 stops16h 00mKLM

Tue 6/37:02 pmBWI - BHD

2 stops16h 53mKLM

Deal found 3/31

$1,285

Best flights from Northern Ireland to Washington, D.C.
Discover carefully curated flight deals from Northern Ireland to Washington, D.C. that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated April 1, 2025.

Mon 5/269:55 pmBFS - IAD

3 stops46h 25mMultiple Airlines

Tue 6/35:12 pmIAD - BFS

2 stops18h 28mMultiple Airlines

Deal found 3/31

$775

Mon 5/267:30 pmBHD - BWI

1 stop29h 05mBritish Airways

Tue 6/39:20 pmBWI - BHD

1 stop13h 00mBritish Airways

Deal found 3/31

$892

Mon 5/266:30 amBHD - DCA

2 stops20h 31mVirgin Atlantic

Tue 6/36:55 pmDCA - BHD

2 stops41h 00mVirgin Atlantic

Deal found 3/31

$984

Mon 5/266:30 amBHD - BWI

2 stops16h 00mKLM

Tue 6/37:02 pmBWI - BHD

2 stops16h 53mKLM

Deal found 3/31

$1,285

Mon 5/266:10 amBFS - BWI

2 stops22h 23mMultiple Airlines

Tue 6/38:30 pmBWI - BFS

2 stops13h 30mMultiple Airlines

Deal found 3/31

$909

Mon 5/267:05 amBHD - BWI

3 stops32h 59mMultiple Airlines

Tue 6/38:30 pmBWI - BHD

2 stops19h 20mMultiple Airlines

Deal found 3/31

$910

Mon 5/268:20 amBFS - DCA

2 stops16h 23mMultiple Airlines

Tue 6/36:59 amDCA - BFS

2 stops28h 41mMultiple Airlines

Deal found 3/31

$1,151

Last-minute flights from Northern Ireland to Washington, D.C.
Discover last-minute flight deals from Northern Ireland to Washington, D.C.. Data last updated April 1, 2025 and is based on user searches.

Mon 5/269:55 pmBFS - IAD

3 stops46h 25mMultiple Airlines

Tue 6/35:12 pmIAD - BFS

2 stops18h 28mMultiple Airlines

Deal found 3/31

$775

Mon 5/267:30 pmBHD - BWI

1 stop29h 05mBritish Airways

Tue 6/39:20 pmBWI - BHD

1 stop13h 00mBritish Airways

Deal found 3/31

$892

Mon 5/266:10 amBFS - BWI

2 stops22h 23mMultiple Airlines

Tue 6/38:30 pmBWI - BFS

2 stops13h 30mMultiple Airlines

Deal found 3/31

$909

Mon 5/267:05 amBHD - BWI

3 stops32h 59mMultiple Airlines

Tue 6/38:30 pmBWI - BHD

2 stops19h 20mMultiple Airlines

Deal found 3/31

$910

Mon 5/266:30 amBHD - DCA

2 stops20h 31mVirgin Atlantic

Tue 6/36:55 pmDCA - BHD

2 stops41h 00mVirgin Atlantic

Deal found 3/31

$984

Mon 5/268:20 amBFS - DCA

2 stops16h 23mMultiple Airlines

Tue 6/36:59 amDCA - BFS

2 stops28h 41mMultiple Airlines

Deal found 3/31

$1,151

Mon 5/266:30 amBHD - BWI

2 stops16h 00mKLM

Tue 6/37:02 pmBWI - BHD

2 stops16h 53mKLM

Deal found 3/31

$1,285

One-way flights from Northern Ireland to Washington, D.C.
Search for one-way flight options from Northern Ireland to Washington, D.C.. Find affordable one-way fares based on user searches. Data last updated April 1, 2025.

Sun 8/3110:55 pmBFS - BWI

2 stops23h 45mMultiple Airlines

Deal found 3/30

$423

Mon 9/16:40 amBFS - IAD

3 stops18h 19mMultiple Airlines

Deal found 3/30

$580

Sun 8/3110:20 amBHD - BWI

2 stops14h 05mMultiple Airlines

Deal found 3/30

$736

Sun 8/318:05 pmBHD - DCA

2 stops25h 19mBritish Airways

Deal found 3/30

$980

Mon 9/112:15 pmBHD - BWI

1 stop12h 20mAmerican Airlines

Deal found 3/30

$1,035

Mon 9/16:40 amBHD - DCA

2 stops18h 20mAmerican Airlines

Deal found 3/30

$1,045

Mon 9/16:30 amBHD - BWI

2 stops15h 39mKLM

Deal found 3/30

$1,770

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Mon 5/26

9:55 pm-3:20 pm

3 stops46h 25m

Washington, D.C. Dulles Intl

Tue 6/3

5:12 pm-4:40 pm

2 stops18h 28m

$775

BelfastBaltimore

BHD - BWI

BHDBWI

Belfast City

Mon 5/26

7:30 pm-7:35 pm

1 stop29h 05m

Baltimore/Washington

Tue 6/3

9:20 pm-3:20 pm

1 stop13h 00m

$892

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Mon 5/26

6:10 am-11:33 pm

2 stops22h 23m

Baltimore/Washington

Tue 6/3

8:30 pm-3:00 pm

2 stops13h 30m

$909

BelfastBaltimore

BHD - BWI

BHDBWI

Belfast City

Mon 5/26

7:05 am-11:04 am

3 stops32h 59m

Baltimore/Washington

Tue 6/3

8:30 pm-8:50 pm

2 stops19h 20m

$910

BelfastWashington, D.C.

BHD - DCA

BHDDCA

Belfast City

Mon 5/26

6:30 am-10:01 pm

2 stops20h 31m

Washington, D.C. Reagan-National

Tue 6/3

6:55 pm-4:55 pm

2 stops41h 00m

$984

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Mon 5/26

8:20 am-7:43 pm

2 stops16h 23m

Washington, D.C. Reagan-National

Tue 6/3

6:59 am-4:40 pm

2 stops28h 41m

$1,151

BelfastBaltimore

BHD - BWI

BHDBWI

Belfast City

Mon 5/26

6:30 am-5:30 pm

2 stops16h 00m

Baltimore/Washington

Tue 6/3

7:02 pm-4:55 pm

2 stops16h 53m

$1,285

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Sun 8/31

10:55 pm-5:40 pm

2 stops23h 45m

$423

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Mon 9/1

6:40 am-7:59 pm

3 stops18h 19m

$580

BelfastBaltimore

BHD - BWI

BHDBWI

Belfast City

Sun 8/31

10:20 am-7:25 pm

2 stops14h 05m

$736

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/30

Showing 1-10 of 14 results

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

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

Rainfall in Washington, D.C. by month

In terms of precipitation, rainfall in Washington, D.C. ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. when rainfall is around 2.6 in.

Temperature in Washington, D.C. by month

If weather is an important factor for your trip to Washington, D.C., 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

Reviews of airlines servicing Washington, D.C.

KLM

7.8

Good

1,323 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

KLM

7.8

Good

1,323 reviews

KLM

7.8

Good

1,323 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Virgin Atlantic

7.4

Good

636 reviews

KLM

7.8

Good

1,323 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

American Airlines

7.2

Good

10,000 reviews

KLM

7.8

Good

1,323 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

British Airways

6.6

Okay

6,715 reviews

KLM

7.8

Good

1,323 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Related info for your journey

What are the cheapest airlines to fly from Northern Ireland to Washington, D.C. one-way?
The cheapest airline one-way is British Airways, with whom users have recently found tickets for as low as $980. However, be on the lookout for offers from American Airlines and KLM, as they are both options that can get you from Northern Ireland to Washington, D.C. for a low price.
What are the most popular routes from Northern Ireland to Washington, D.C.?
The most popular route from Northern Ireland to Washington, D.C. is Belfast Intl - Baltimore/Washington. You may also consider Belfast Intl - Washington, D.C. Dulles Intl or Belfast Intl - Washington, D.C. Reagan-National.
Can I find deals for flights from Northern Ireland to Washington, D.C. that include hotel bookings?
Yes. In addition to deals on Northern Ireland to Washington, D.C. flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Northern Ireland to Washington, D.C.?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to Washington, D.C..
Can I find deals for business class flights from Northern Ireland to Washington, D.C.?
Yes. Cheapflights offers flight deals from Northern Ireland to Washington, D.C. 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 Northern Ireland to Washington, D.C.?
Currently, August is the cheapest month in which you can book a flight from Northern Ireland to Washington, D.C. (average of $241). Flying from Northern Ireland to Washington, D.C. in March is currently the most expensive (average of $290). 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

Arlington

Alexandria

Fairfax

Tysons

Springfield

Rockville

Fredericksburg

Woodbridge

Gaithersburg

Linthicum Heights

Silver Spring

Falls Church

Laurel

Easton

Herndon

Bowie

Gettysburg

National Harbor

Oxon Hill

Reston

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$423+ Cheap flights from Northern Ireland to Washington, D.C. (WAS)

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 8/31. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Northern Ireland to Washington, D.C. with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Keep the following information in mind while searching for Northern Ireland to Washington, D.C. flight deals. Data was last updated April 1, 2025.

Round-trip from

One-way from

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

Cheapest flights from Northern Ireland to Washington, D.C.Explore the most affordable flight options available from Northern Ireland to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

Explore the most affordable flight options available from Northern Ireland to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.

Cheapflights Fare Finder

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

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

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

Cheapflights Insights

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

Rainfall in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average rainfall totals by month.

Temperature in Washington, D.C. by month

Plan your trip to Washington, D.C. by taking into account the average temperature totals by month.

Reviews of airlines servicing Washington, D.C.

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland to Washington, D.C.. 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 to fly from Northern Ireland to Washington, D.C. one-way?

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

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

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

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

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

Traveling to a place near Northern Ireland?

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 Northern Ireland to Washington, D.C.

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Cheapest flights from Northern Ireland to Washington, D.C.
Explore the most affordable flight options available from Northern Ireland to Washington, D.C.. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 1, 2025.