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

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. to Northern Ireland (average of $657). Flying from Washington, D.C. to Northern Ireland 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.

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

When deciding which route to take from Washington, D.C. to Northern Ireland consider Washington, D.C. Dulles Intl - Belfast Intl, Washington, D.C. Dulles Intl - Belfast City or Washington, D.C. Reagan-National - Belfast Intl as they are the most popular.

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

October can be a great time to fly to Northern Ireland from Washington, D.C. with a flight ticket averaging about $748. Cheapflights users have found deals in the month of October for as cheap as $578. The most expensive prices can be found in the month of July.

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

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

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 vacation 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.

$478+ Flights from Washington, D.C. to Northern Ireland

Home Search by date Vacation packages Hotels Flight deals Car rental Travel tips & news

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

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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

Round-trip from	$599 (Mytrip)
One-way from	$485 (British Airways)

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

Search Deals

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

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 January 21, 2025.

Tue 4/86:50 pmBWI - BFS

2 stops19h 25mMultiple Airlines

Thu 5/16:00 amBFS - BWI

2 stops16h 40mMultiple Airlines

Deal found 1/20

$599

Wed 4/210:40 pmIAD - BHD

1 stop11h 55mBritish Airways

Wed 4/166:50 amBHD - IAD

1 stop14h 00mBritish Airways

Deal found 1/20

$614

Mon 3/249:30 pmBWI - BHD

1 stop12h 40mBritish Airways

Mon 3/317:30 pmBHD - BWI

1 stop29h 05mBritish Airways

Deal found 1/21

$617

Wed 2/197:30 pmIAD - BHD

2 stops16h 05mAmerican Airlines

Tue 2/258:40 amBHD - IAD

1 stop11h 55mAmerican Airlines

Deal found 1/21

$620

Mon 3/243:10 pmDCA - BHD

2 stops15h 20mBritish Airways

Mon 3/317:30 pmBHD - DCA

2 stops25h 29mBritish Airways

Deal found 1/21

$630

Mon 3/248:30 pmBWI - BHD

2 stops20h 00mMultiple Airlines

Mon 3/318:50 amBHD - BWI

2 stops15h 35mMultiple Airlines

Deal found 1/21

$645

Mon 3/244:53 pmBWI - BHD

2 stops13h 37mAmerican Airlines

Mon 3/316:40 amBHD - BWI

1 stop17h 55mAmerican Airlines

Deal found 1/21

$650

Wed 2/195:35 pmIAD - BHD

1 stop18h 15mKLM

Tue 2/256:30 amBHD - IAD

1 stop14h 15mKLM

Deal found 1/21

$651

Mon 3/248:40 pmIAD - BFS

2 stops20h 25mMultiple Airlines

Mon 3/318:15 amBFS - IAD

2 stops16h 05mMultiple Airlines

Deal found 1/21

$672

Tue 4/84:45 pmBWI - BHD

2 stops19h 10mDelta

Thu 5/16:30 amBHD - BWI

2 stops14h 59mDelta

Deal found 1/20

$697

Mon 3/2411:10 amDCA - BFS

2 stops28h 35mMultiple Airlines

Mon 3/313:30 pmBFS - DCA

3 stops34h 38mMultiple Airlines

Deal found 1/21

$741

Sun 3/163:55 pmIAD - BHD

3 stops24h 55mMultiple Airlines

Sun 3/237:00 amBHD - IAD

2 stops18h 05mMultiple Airlines

Deal found 1/21

$818

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 layovers in mind to ensure you get the best travel experience. Data last updated January 21, 2025.

Tue 4/86:50 pmBWI - BFS

2 stops19h 25mMultiple Airlines

Thu 5/16:00 amBFS - BWI

2 stops16h 40mMultiple Airlines

Deal found 1/20

$599

Wed 4/210:40 pmIAD - BHD

1 stop11h 55mBritish Airways

Wed 4/166:50 amBHD - IAD

1 stop14h 00mBritish Airways

Deal found 1/20

$614

Wed 2/197:30 pmIAD - BHD

2 stops16h 05mAmerican Airlines

Tue 2/258:40 amBHD - IAD

1 stop11h 55mAmerican Airlines

Deal found 1/21

$620

Wed 2/195:35 pmIAD - BHD

1 stop18h 15mKLM

Tue 2/256:30 amBHD - IAD

1 stop14h 15mKLM

Deal found 1/21

$651

Tue 4/84:45 pmBWI - BHD

2 stops19h 10mDelta

Thu 5/16:30 amBHD - BWI

2 stops14h 59mDelta

Deal found 1/20

$697

Wed 2/198:30 pmBWI - BHD

1 stop15h 05mFinnair

Tue 2/253:05 pmBHD - BWI

1 stop32h 40mFinnair

Deal found 1/21

$820

Tue 4/85:22 pmIAD - BHD

2 stops22h 43mVirgin Atlantic

Thu 5/16:30 amBHD - IAD

2 stops22h 39mVirgin Atlantic

Deal found 1/20

$892

Sat 4/55:20 pmIAD - BHD

2 stops13h 55mAer Lingus

Sat 4/197:00 pmBHD - IAD

2 stops52h 55mAer Lingus

Deal found 1/20

$1,108

Mon 3/249:30 pmBWI - BHD

1 stop12h 40mBritish Airways

Mon 3/317:30 pmBHD - BWI

1 stop29h 05mBritish Airways

Deal found 1/21

$617

Mon 3/248:30 pmBWI - BHD

2 stops20h 00mMultiple Airlines

Mon 3/318:50 amBHD - BWI

2 stops15h 35mMultiple Airlines

Deal found 1/21

$645

Mon 3/244:53 pmBWI - BHD

2 stops13h 37mAmerican Airlines

Mon 3/316:40 amBHD - BWI

1 stop17h 55mAmerican Airlines

Deal found 1/21

$650

Mon 3/243:10 pmDCA - BHD

2 stops15h 20mBritish Airways

Mon 3/317:30 pmBHD - DCA

2 stops25h 29mBritish Airways

Deal found 1/21

$630

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 January 21, 2025 and is based on user searches.

Wed 1/296:00 pmIAD - BHD

1 stop11h 05mBritish Airways

Sun 2/212:10 pmBHD - IAD

1 stop12h 35mBritish Airways

Deal found 1/20

$626

Wed 1/298:30 pmBWI - BHD

1 stop15h 05mBritish Airways

Sun 2/26:30 amBHD - BWI

1 stop17h 15mBritish Airways

Deal found 1/20

$635

Wed 1/2912:55 pmDCA - BHD

2 stops16h 10mBritish Airways

Sun 2/26:30 amBHD - DCA

2 stops15h 25mBritish Airways

Deal found 1/20

$646

Wed 1/295:26 pmBWI - BHD

3 stops22h 44mMultiple Airlines

Sun 2/26:30 amBHD - BWI

1 stop17h 15mMultiple Airlines

Deal found 1/20

$881

Wed 2/197:30 pmIAD - BHD

2 stops16h 05mAmerican Airlines

Tue 2/258:40 amBHD - IAD

1 stop11h 55mAmerican Airlines

Deal found 1/21

$620

Wed 2/198:09 pmBWI - BHD

2 stops18h 01mBritish Airways

Tue 2/255:10 pmBHD - BWI

1 stop30h 35mBritish Airways

Deal found 1/21

$621

Wed 2/1912:40 pmDCA - BHD

2 stops16h 25mBritish Airways

Sun 2/236:30 amBHD - DCA

2 stops21h 05mBritish Airways

Deal found 1/21

$645

Wed 2/195:35 pmIAD - BHD

1 stop18h 15mKLM

Tue 2/256:30 amBHD - IAD

1 stop14h 15mKLM

Deal found 1/21

$651

Wed 2/198:30 pmBWI - BHD

1 stop15h 05mFinnair

Tue 2/253:05 pmBHD - BWI

1 stop32h 40mFinnair

Deal found 1/21

$820

Wed 2/1910:30 pmIAD - BHD

2 stops17h 00mMultiple Airlines

Sun 2/237:10 amBHD - IAD

3 stops34h 50mMultiple Airlines

Deal found 1/21

$1,109

Fri 2/216:59 amDCA - BFS

2 stops25h 56mMultiple Airlines

Thu 2/275:45 pmBFS - DCA

3 stops29h 22mMultiple Airlines

Deal found 1/21

$906

Fri 2/217:00 amBWI - BFS

3 stops34h 40mMultiple Airlines

Thu 2/277:45 pmBFS - BWI

3 stops26h 15mMultiple Airlines

Deal found 1/21

$908

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 January 21, 2025.

Sat 7/199:20 pmBWI - BHD

1 stop12h 45mBritish Airways

Deal found 1/19

$485

Sat 7/194:30 pmDCA - BHD

2 stops12h 40mBritish Airways

Deal found 1/19

$486

Find flights from Washington, D.C. to Northern Ireland within your budget

Fly from

Fly to

Route

Depart

Return

Price

BaltimoreBelfast

BWI - BFS

BWIBFS

Baltimore/Washington

Tue 4/8

6:50 pm-7:15 pm

2 stops19h 25m

Belfast Intl

Thu 5/1

6:00 am-5:40 pm

2 stops16h 40m

$599

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 4/2

10:40 pm-3:35 pm

1 stop11h 55m

Belfast City

Wed 4/16

6:50 am-3:50 pm

1 stop14h 00m

$614

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 3/24

9:30 pm-2:10 pm

1 stop12h 40m

Belfast City

Mon 3/31

7:30 pm-7:35 pm

1 stop29h 05m

$617

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 2/19

7:30 pm-4:35 pm

2 stops16h 05m

Belfast City

Tue 2/25

8:40 am-3:35 pm

1 stop11h 55m

$620

Washington, D.C.Belfast

DCA - BHD

DCABHD

Washington, D.C. Reagan-National

Mon 3/24

3:10 pm-10:30 am

2 stops15h 20m

Belfast City

Mon 3/31

7:30 pm-3:59 pm

2 stops25h 29m

$630

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 3/24

8:30 pm-8:30 pm

2 stops20h 00m

Belfast City

Mon 3/31

8:50 am-7:25 pm

2 stops15h 35m

$645

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Mon 3/24

4:53 pm-10:30 am

2 stops13h 37m

Belfast City

Mon 3/31

6:40 am-7:35 pm

1 stop17h 55m

$650

Washington, D.C.Belfast

IAD - BHD

IADBHD

Washington, D.C. Dulles Intl

Wed 2/19

5:35 pm-4:50 pm

1 stop18h 15m

Belfast City

Tue 2/25

6:30 am-3:45 pm

1 stop14h 15m

$651

Washington, D.C.Belfast

IAD - BFS

IADBFS

Washington, D.C. Dulles Intl

Mon 3/24

8:40 pm-9:05 pm

2 stops20h 25m

Belfast Intl

Mon 3/31

8:15 am-7:20 pm

2 stops16h 05m

$672

BaltimoreBelfast

BWI - BHD

BWIBHD

Baltimore/Washington

Tue 4/8

4:45 pm-4:55 pm

2 stops19h 10m

Belfast City

Thu 5/1

6:30 am-4:29 pm

2 stops14h 59m

$697

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 21 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 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.

Travel insights for flights from Washington, D.C. to Northern Ireland

Get recent, data-driven insights about flights from Washington, D.C. to Northern Ireland including ideal travel times, pricing trends, and more.

Rainfall in Northern Ireland by month

In terms of precipitation, rainfall in Northern Ireland ranges from 2.0 - 3.5 inches per month. October is typically the wettest month, when rainfall can reach 3.5 in. April is typically the driest time to visit Northern Ireland when rainfall is around 2.0 in.

Temperature in Northern Ireland by month

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 60.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 41.0 F).

Reviews of airlines servicing Northern Ireland

Read through reviews of airlines operating flights from Washington, D.C. to Northern Ireland, such as British Airways and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very good

8,521 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta

8.0

Very good

8,521 reviews

Delta

8.0

Very good

8,521 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM

7.8

Good

1,341 reviews

Delta

8.0

Very good

8,521 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Finnair

7.6

Good

1,286 reviews

Delta

8.0

Very good

8,521 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Virgin Atlantic

7.5

Good

665 reviews

Delta

8.0

Very good

8,521 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

American Airlines

7.2

Good

10,000 reviews

Delta

8.0

Very good

8,521 reviews

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Related info for your journey

What are the most popular routes from Washington, D.C. to Northern Ireland?
When deciding which route to take from Washington, D.C. to Northern Ireland consider Washington, D.C. Dulles Intl - Belfast Intl, Washington, D.C. Dulles Intl - Belfast City or Washington, D.C. Reagan-National - Belfast Intl as they are the most popular.
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 vacation 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, February is the cheapest month in which you can book a flight from Washington, D.C. to Northern Ireland (average of $657). Flying from Washington, D.C. to Northern Ireland 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

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

Dulles Intl to Heathrow flights

Reagan-National to Heathrow flights

Dulles Intl to Gatwick flights

Dulles Intl to London City flights

Reagan-National to Gatwick flights

Dulles Intl to Edinburgh flights

Reagan-National to London City flights

Dulles Intl to Luton flights

Reagan-National to Edinburgh flights

Dulles Intl to Stansted flights

Dulles Intl to Glasgow Intl flights

Dulles Intl to Manchester flights

Reagan-National to Glasgow Intl flights

Reagan-National to Manchester flights

Dulles Intl to Southampton flights

Dulles Intl to Inverness flights

Reagan-National to Inverness flights

Dulles Intl to Belfast Intl flights

Dulles Intl to Birmingham flights

Reagan-National to Birmingham flights

Dulles Intl to Belfast City flights

Dulles Intl to Aberdeen flights

Reagan-National to Belfast Intl flights

Dulles Intl to Newcastle upon Tyne flights

Reagan-National to Belfast City flights

Reagan-National to Newcastle upon Tyne flights

Reagan-National to Aberdeen flights

Reagan-National to Stansted flights

Dulles Intl to Liverpool flights

Dulles Intl to Leeds flights

Reagan-National to Leeds flights

Dulles Intl to Bristol flights

Reagan-National to Luton flights

Dulles Intl to Cardiff flights

Dulles Intl to Kirkwall flights

Reagan-National to Bristol flights

Reagan-National to Cardiff flights

Reagan-National to Liverpool flights

Reagan-National to Southampton flights

Dulles Intl to Newquay flights

Dulles Intl to Bournemouth flights

Reagan-National to Newquay flights

Dulles Intl to Southend flights

Dulles Intl to Exeter flights

Dulles Intl to Isle of Islay flights

Top airline flying from Washington, D.C. to Northern Ireland

Airline	Cheapest	Average	Flexibility	On-time
British Airways	Cheapest$557	Average$828	FlexibilityNo cancel fee	On-time70%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

$478+ Cheap flights from Washington, D.C. (WAS) to Northern Ireland

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 7/19. Fares are subject to change and may not be available on all flights or dates of travel.

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

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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

Round-trip from

One-way from

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 January 21, 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 January 21, 2025.

Find flights from Washington, D.C. to Northern Ireland within your budget

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.

Travel insights for flights from Washington, D.C. to Northern Ireland

Get recent, data-driven insights about flights from Washington, D.C. to Northern Ireland including ideal travel times, pricing trends, and more.

Rainfall in Northern Ireland by month

Plan your trip to Northern Ireland by taking into account the average rainfall totals by month.

Temperature in Northern Ireland by month

Plan your trip to Northern Ireland by taking into account the average temperature totals by month.

Reviews of airlines servicing Northern Ireland

Read through reviews of airlines operating flights from Washington, D.C. to Northern Ireland, such as British Airways and American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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

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

Top airline flying from Washington, D.C. to Northern Ireland

100% Free

Book with Flexibility

Travel Smart

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 January 21, 2025.