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

The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as $849. However, be on the lookout for offers from British Airways and Finnair, 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 $309). Flying from Northern Ireland to Washington, D.C. in June is currently the most expensive (average of $383). 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.

$517+ 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	$715 (Mytrip)
One-way from	$517 (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 17, 2025.

Tue 5/206:45 amBFS - IAD

3 stops37h 35mMultiple Airlines

Tue 5/275:12 pmIAD - BFS

2 stops18h 28mMultiple Airlines

Deal found 4/16

$715

Tue 5/206:15 amBFS - DCA

3 stops21h 13mMultiple Airlines

Tue 5/276:59 amDCA - BFS

2 stops28h 41mMultiple Airlines

Deal found 4/16

$862

Tue 5/206:35 amBHD - IAD

1 stop14h 10mBritish Airways

Tue 5/277:25 pmIAD - BHD

1 stop12h 35mBritish Airways

Deal found 4/16

$911

Tue 5/206:55 amBHD - IAD

2 stops19h 30mMultiple Airlines

Tue 5/275:12 pmIAD - BHD

2 stops22h 58mMultiple Airlines

Deal found 4/16

$944

Tue 5/206:30 amBHD - IAD

2 stops18h 09mKLM

Tue 5/275:25 pmIAD - BHD

1 stop22h 40mKLM

Deal found 4/16

$986

Tue 5/206:15 amBFS - BWI

2 stops18h 10mMultiple Airlines

Tue 5/278:30 pmBWI - BFS

2 stops19h 05mMultiple Airlines

Deal found 4/16

$1,059

Tue 5/206:35 amBHD - BWI

1 stop18h 00mBritish Airways

Tue 5/279:20 pmBWI - BHD

1 stop10h 40mBritish Airways

Deal found 4/16

$1,139

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 17, 2025.

Tue 5/206:45 amBFS - IAD

3 stops37h 35mMultiple Airlines

Tue 5/275:12 pmIAD - BFS

2 stops18h 28mMultiple Airlines

Deal found 4/16

$715

Tue 5/206:35 amBHD - IAD

1 stop14h 10mBritish Airways

Tue 5/277:25 pmIAD - BHD

1 stop12h 35mBritish Airways

Deal found 4/16

$911

Tue 5/206:30 amBHD - IAD

2 stops18h 09mKLM

Tue 5/275:25 pmIAD - BHD

1 stop22h 40mKLM

Deal found 4/16

$986

Tue 5/206:15 amBFS - DCA

3 stops21h 13mMultiple Airlines

Tue 5/276:59 amDCA - BFS

2 stops28h 41mMultiple Airlines

Deal found 4/16

$862

Tue 5/206:55 amBHD - IAD

2 stops19h 30mMultiple Airlines

Tue 5/275:12 pmIAD - BHD

2 stops22h 58mMultiple Airlines

Deal found 4/16

$944

Tue 5/206:35 amBHD - BWI

1 stop18h 00mBritish Airways

Tue 5/279:20 pmBWI - BHD

1 stop10h 40mBritish Airways

Deal found 4/16

$1,139

Tue 5/206:15 amBFS - BWI

2 stops18h 10mMultiple Airlines

Tue 5/278:30 pmBWI - BFS

2 stops19h 05mMultiple Airlines

Deal found 4/16

$1,059

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 17, 2025 and is based on user searches.

Tue 5/206:45 amBFS - IAD

3 stops37h 35mMultiple Airlines

Tue 5/275:12 pmIAD - BFS

2 stops18h 28mMultiple Airlines

Deal found 4/16

$715

Tue 5/206:15 amBFS - DCA

3 stops21h 13mMultiple Airlines

Tue 5/276:59 amDCA - BFS

2 stops28h 41mMultiple Airlines

Deal found 4/16

$862

Tue 5/206:35 amBHD - IAD

1 stop14h 10mBritish Airways

Tue 5/277:25 pmIAD - BHD

1 stop12h 35mBritish Airways

Deal found 4/16

$911

Tue 5/206:55 amBHD - IAD

2 stops19h 30mMultiple Airlines

Tue 5/275:12 pmIAD - BHD

2 stops22h 58mMultiple Airlines

Deal found 4/16

$944

Tue 5/206:30 amBHD - IAD

2 stops18h 09mKLM

Tue 5/275:25 pmIAD - BHD

1 stop22h 40mKLM

Deal found 4/16

$986

Tue 5/206:15 amBFS - BWI

2 stops18h 10mMultiple Airlines

Tue 5/278:30 pmBWI - BFS

2 stops19h 05mMultiple Airlines

Deal found 4/16

$1,059

Tue 5/206:35 amBHD - BWI

1 stop18h 00mBritish Airways

Tue 5/279:20 pmBWI - BHD

1 stop10h 40mBritish Airways

Deal found 4/16

$1,139

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 17, 2025.

Sun 8/310:10 pmBFS - BWI

3 stops48h 30mMultiple Airlines

Deal found 4/15

$517

Sun 8/37:05 amBHD - BWI

2 stops39h 35mMultiple Airlines

Deal found 4/15

$680

Sun 8/36:50 amBFS - IAD

3 stops33h 55mMultiple Airlines

Deal found 4/15

$738

Sun 8/36:45 amBFS - DCA

3 stops21h 07mMultiple Airlines

Deal found 4/15

$748

Sun 8/37:30 amBHD - DCA

3 stops20h 22mMultiple Airlines

Deal found 4/15

$780

Mon 6/306:00 pmBHD - IAD

2 stops26h 50mAer Lingus

Deal found 4/17

$849

Sun 8/38:05 pmBHD - DCA

2 stops25h 11mBritish Airways

Deal found 4/15

$1,335

Mon 6/307:30 pmBHD - BWI

1 stop29h 05mFinnair

Deal found 4/16

$1,665

Mon 6/306:40 amBHD - DCA

2 stops21h 27mIberia

Deal found 4/16

$1,681

Mon 6/306:30 amBHD - IAD

1 stop14h 05mVirgin Atlantic

Deal found 4/17

$1,704

Mon 6/301:50 pmBHD - BWI

1 stop10h 45mBritish Airways

Deal found 4/17

$1,712

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

Tue 5/20

6:45 am-3:20 pm

3 stops37h 35m

Washington, D.C. Dulles Intl

Tue 5/27

5:12 pm-4:40 pm

2 stops18h 28m

$715

BelfastWashington, D.C.

BFS - DCA

BFSDCA

Belfast Intl

Tue 5/20

6:15 am-10:28 pm

3 stops21h 13m

Washington, D.C. Reagan-National

Tue 5/27

6:59 am-4:40 pm

2 stops28h 41m

$862

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 5/20

6:35 am-3:45 pm

1 stop14h 10m

Washington, D.C. Dulles Intl

Tue 5/27

7:25 pm-1:00 pm

1 stop12h 35m

$911

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 5/20

6:55 am-9:25 pm

2 stops19h 30m

Washington, D.C. Dulles Intl

Tue 5/27

5:12 pm-9:10 pm

2 stops22h 58m

$944

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 5/20

6:30 am-7:39 pm

2 stops18h 09m

Washington, D.C. Dulles Intl

Tue 5/27

5:25 pm-9:05 pm

1 stop22h 40m

$986

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Tue 5/20

6:15 am-7:25 pm

2 stops18h 10m

Baltimore/Washington

Tue 5/27

8:30 pm-8:35 pm

2 stops19h 05m

$1,059

BelfastBaltimore

BHD - BWI

BHDBWI

Belfast City

Tue 5/20

6:35 am-7:35 pm

1 stop18h 00m

Baltimore/Washington

Tue 5/27

9:20 pm-1:00 pm

1 stop10h 40m

$1,139

BelfastBaltimore

BFS - BWI

BFSBWI

Belfast Intl

Sun 8/3

10:10 pm-5:40 pm

3 stops48h 30m

$517

BelfastBaltimore

BHD - BWI

BHDBWI

Belfast City

Sun 8/3

7:05 am-5:40 pm

2 stops39h 35m

$680

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

Sun 8/3

6:50 am-11:45 am

3 stops33h 55m

$738

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/15

Showing 1-10 of 18 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

1,329 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

1,329 reviews

KLM

7.8

Good

1,329 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Finnair

7.6

Good

1,269 reviews

KLM

7.8

Good

1,329 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Virgin Atlantic

7.4

Good

642 reviews

KLM

7.8

Good

1,329 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Aer Lingus

7.0

Good

1,063 reviews

KLM

7.8

Good

1,329 reviews

Reviews

1 / 20

8.0

Excellent

Anonymous,Mar 2025

LBA - AMS

Iberia

7.0

Good

2,676 reviews

KLM

7.8

Good

1,329 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 Aer Lingus, with whom users have recently found tickets for as low as $849. However, be on the lookout for offers from British Airways and Finnair, 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 $309). Flying from Northern Ireland to Washington, D.C. in June is currently the most expensive (average of $383). 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

Woodbridge

Rockville

Fredericksburg

Gaithersburg

Silver Spring

Linthicum Heights

Falls Church

Laurel

Easton

Herndon

Bowie

Gettysburg

National Harbor

Oxon Hill

Reston

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$517+ 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 8/3. 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 17, 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 17, 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 17, 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 17, 2025.