What are the cheapest airlines to fly from State of Washington to Northern Ireland one-way?

The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £342. However, be on the lookout for offers from American Airlines and Iberia, as they are both options that can get you from State of Washington to Northern Ireland for a low price.

What is the cheapest month to book a flight from State of Washington to Northern Ireland?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Northern Ireland (average of £67). Flying from State of Washington 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.

What is the cheapest month to fly from State of Washington to Northern Ireland?

Our data shows that October tends to be the cheapest month to fly to Northern Ireland from State of Washington. Users have commonly found prices around £728 for the month, but tickets can be as low as £424. Due to multiple factors, prepare for potentially higher prices in June.

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

When flying from State of Washington 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 to Northern Ireland that include hotel bookings?

Yes. In addition to deals on Washington to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Washington 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 to Northern Ireland.

Can I find deals for business class flights from Washington to Northern Ireland?

Yes. Cheapflights offers flight deals from Washington 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.

£273+ Flights from Washington to Northern Ireland

Cheap flight deals from Washington to Northern Ireland

Round-trip from	£530
One-way from	£273
Popular in	June
Cheapest in	October
Average price	£591

British Airways
7/4-13/4
2 total stops
41h 45m total
Washington to Northern Ireland

Search Deals

4/5
3 total stops
59h 25m total
Washington to Northern Ireland

Search Deals

Highest demand for flights based on searches. 17% potential increase in price (£119 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£32 potential savings vs. average return price).

Search Deals

Average for round-trip flights in March 2025

Search Deals

Find flight deals from Washington to Northern Ireland

Cheapest flights from Washington to Northern Ireland
Explore the most affordable flight options available from Washington to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.

Tue 28/1019:50SEA - BHD

1 stop12h 05mMultiple Airlines

Tue 4/1106:35BHD - SEA

1 stop12h 45mMultiple Airlines

Deal found 31/3£581

Mon 21/413:57PDX - BHD

2 stops21h 38mBritish Airways

Sun 27/420:05BHD - PDX

2 stops34h 57mBritish Airways

Deal found 30/3£584

Tue 28/1015:13SEA - BHD

2 stops16h 42mAmerican Airlines

Tue 4/1106:35BHD - SEA

1 stop18h 20mAmerican Airlines

Deal found 31/3£591

Wed 30/420:20SEA - BHD

1 stop16h 25mBritish Airways

Mon 12/519:30BHD - SEA

1 stop23h 40mBritish Airways

Deal found 31/3£610

Mon 21/414:58PDX - BHD

2 stops16h 42mAmerican Airlines

Sat 26/407:05BHD - PDX

2 stops20h 49mAmerican Airlines

Deal found 30/3£673

Thu 15/515:45SEA - BFS

2 stops16h 55mMultiple Airlines

Thu 22/506:10BFS - SEA

3 stops26h 00mMultiple Airlines

Deal found 31/3£679

Sun 4/507:10SEA - BHD

2 stops30h 05mDelta

Mon 12/517:25BHD - SEA

1 stop26h 15mDelta

Deal found 31/3£710

Thu 15/514:10SEA - BHD

1 stop23h 05mKLM

Thu 22/506:30BHD - SEA

1 stop13h 10mKLM

Deal found 31/3£726

Sun 11/518:45SEA - BHD

2 stops18h 10mAer Lingus

Sun 18/518:00BHD - SEA

2 stops30h 59mAer Lingus

Deal found 31/3£761

Mon 21/413:15PDX - BHD

1 stop24h 00mKLM

Sat 26/406:30BHD - PDX

1 stop12h 50mKLM

Deal found 30/3£815

Sun 4/506:08SEA - BHD

2 stops21h 22mFinnair

Mon 12/519:30BHD - SEA

2 stops35h 39mFinnair

Deal found 31/3£823

Sat 3/508:30SEA - BHD

2 stops24h 45mIberia

Sun 11/506:50BHD - SEA

2 stops19h 56mIberia

Deal found 31/3£852

Best flights from Washington to Northern Ireland
Discover carefully curated flight deals from Washington to Northern Ireland that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 31 March 2025.

Mon 7/419:25PDX - BHD

1 stop12h 15mBritish Airways

Sun 13/420:05BHD - PDX

1 stop29h 30mBritish Airways

Deal found 31/3£530

Mon 7/414:58PDX - BHD

2 stops18h 32mAmerican Airlines

Sun 13/411:00BHD - PDX

2 stops20h 02mAmerican Airlines

Deal found 31/3£537

Thu 15/515:45SEA - BFS

2 stops16h 55mMultiple Airlines

Thu 22/506:10BFS - SEA

3 stops26h 00mMultiple Airlines

Deal found 31/3£679

Sun 4/507:10SEA - BHD

2 stops30h 05mDelta

Mon 12/517:25BHD - SEA

1 stop26h 15mDelta

Deal found 31/3£710

Thu 15/514:10SEA - BHD

1 stop23h 05mKLM

Thu 22/506:30BHD - SEA

1 stop13h 10mKLM

Deal found 31/3£726

Sun 11/518:45SEA - BHD

2 stops18h 10mAer Lingus

Sun 18/518:00BHD - SEA

2 stops30h 59mAer Lingus

Deal found 31/3£761

Sun 4/506:08SEA - BHD

2 stops21h 22mFinnair

Mon 12/519:30BHD - SEA

2 stops35h 39mFinnair

Deal found 31/3£823

Sat 3/508:30SEA - BHD

2 stops24h 45mIberia

Sun 11/506:50BHD - SEA

2 stops19h 56mIberia

Deal found 31/3£852

Wed 30/420:20SEA - BHD

1 stop16h 25mBritish Airways

Mon 12/519:30BHD - SEA

1 stop23h 40mBritish Airways

Deal found 31/3£610

Fri 2/513:35SEA - BHD

2 stops17h 55mAmerican Airlines

Sun 11/515:50BHD - SEA

1 stop27h 45mAmerican Airlines

Deal found 31/3£627

Thu 15/515:45SEA - BHD

2 stops17h 35mMultiple Airlines

Thu 22/507:05BHD - SEA

3 stops25h 05mMultiple Airlines

Deal found 31/3£725

Mon 21/413:15PDX - BHD

1 stop24h 00mKLM

Sat 26/406:30BHD - PDX

1 stop12h 50mKLM

Deal found 30/3£815

Last-minute flights from Washington to Northern Ireland
Discover last-minute flight deals from Washington to Northern Ireland. Data last updated 31 March 2025 and is based on user searches.

Mon 7/419:25PDX - BHD

1 stop12h 15mBritish Airways

Sun 13/420:05BHD - PDX

1 stop29h 30mBritish Airways

Deal found 31/3£530

Mon 7/414:58PDX - BHD

2 stops18h 32mAmerican Airlines

Sun 13/411:00BHD - PDX

2 stops20h 02mAmerican Airlines

Deal found 31/3£537

Mon 21/413:57PDX - BHD

2 stops21h 38mBritish Airways

Sun 27/420:05BHD - PDX

2 stops34h 57mBritish Airways

Deal found 30/3£584

Mon 21/414:58PDX - BHD

2 stops16h 42mAmerican Airlines

Sat 26/407:05BHD - PDX

2 stops20h 49mAmerican Airlines

Deal found 30/3£673

Mon 21/413:15PDX - BHD

1 stop24h 00mKLM

Sat 26/406:30BHD - PDX

1 stop12h 50mKLM

Deal found 30/3£815

Wed 30/420:20SEA - BHD

1 stop16h 25mBritish Airways

Mon 12/519:30BHD - SEA

1 stop23h 40mBritish Airways

Deal found 31/3£610

Wed 30/413:30SEA - BHD

1 stop18h 05mMultiple Airlines

Mon 12/506:55BHD - SEA

2 stops21h 33mMultiple Airlines

Deal found 31/3£771

Wed 30/417:55SEA - BHD

2 stops39h 00mDelta

Mon 12/517:25BHD - SEA

2 stops35h 24mDelta

Deal found 31/3£850

One-way flights from Washington to Northern Ireland
Search for one-way flight options from Washington to Northern Ireland. Find affordable one-way fares based on user searches. Data last updated 31 March 2025.

Sun 4/519:35SEA - BFS

3 stops59h 25mMultiple Airlines

Deal found 31/3£273

Sun 4/510:06SEA - BHD

3 stops46h 19mMultiple Airlines

Deal found 31/3£299

Wed 7/518:45SEA - BHD

2 stops17h 10mAer Lingus

Deal found 31/3£342

Wed 7/520:20SEA - BHD

1 stop16h 25mAmerican Airlines

Deal found 31/3£350

Sun 4/520:20SEA - BHD

1 stop16h 25mIberia

Deal found 31/3£352

Sun 11/520:20SEA - BHD

1 stop14h 25mBritish Airways

Deal found 31/3£360

Mon 26/519:25PDX - BHD

1 stop14h 05mBritish Airways

Deal found 30/3£604

Mon 26/515:24PDX - BHD

2 stops18h 06mAmerican Airlines

Deal found 30/3£621

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 7/4

19:25-15:40

1 stop12h 15m

Belfast City

Sun 13/4

20:05-17:35

1 stop29h 30m

£530

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 7/4

14:58-17:30

2 stops18h 32m

Belfast City

Sun 13/4

11:00-23:02

2 stops20h 02m

£537

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 30/4

20:20-20:45

1 stop16h 25m

Belfast City

Mon 12/5

19:30-11:10

1 stop23h 40m

£610

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 2/5

13:35-15:30

2 stops17h 55m

Belfast City

Sun 11/5

15:50-11:35

1 stop27h 45m

£627

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 15/5

15:45-16:40

2 stops16h 55m

Belfast Intl

Thu 22/5

06:10-00:10

3 stops26h 00m

£679

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 4/5

07:10-21:15

2 stops30h 05m

Belfast City

Mon 12/5

17:25-11:40

1 stop26h 15m

£710

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 15/5

15:45-17:20

2 stops17h 35m

Belfast City

Thu 22/5

07:05-00:10

3 stops25h 05m

£725

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 15/5

14:10-21:15

1 stop23h 05m

Belfast City

Thu 22/5

06:30-11:40

1 stop13h 10m

£726

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 11/5

18:45-20:55

2 stops18h 10m

Belfast City

Sun 18/5

18:00-16:59

2 stops30h 59m

£761

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 21/4

13:15-21:15

1 stop24h 00m

Belfast City

Sat 26/4

06:30-11:20

1 stop12h 50m

£815

Flights are sorted by cheapest return flights first.

Deals found on 31/3

Showing 1-10 of 20 results

Best time to book a flight from Washington to Northern Ireland

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

Rainfall in Northern Ireland by month

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.

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 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).

Reviews of airlines servicing Northern Ireland

Read reviews from past customers who have flown Delta, KLM and Finnair from Washington to Northern Ireland. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Delta

8.0

Very Good

7,899 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

KLM

7.8

Good

1,321 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Finnair

7.6

Good

1,267 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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

Aer Lingus

7.0

Good

1,061 reviews

Delta

8.0

Very Good

7,899 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Aaron,Oct 2024

LAX - LHR

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 cheapest airlines to fly from State of Washington to Northern Ireland one-way?
The cheapest airline one-way is Aer Lingus, with whom users have recently found tickets for as low as £342. However, be on the lookout for offers from American Airlines and Iberia, as they are both options that can get you from State of Washington to Northern Ireland for a low price.
Can I find deals for flights from Washington to Northern Ireland that include hotel bookings?
Yes. In addition to deals on Washington to Northern Ireland flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Washington 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 to Northern Ireland.
Can I find deals for business class flights from Washington to Northern Ireland?
Yes. Cheapflights offers flight deals from Washington 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 State of Washington to Northern Ireland?
Currently, January is the cheapest month in which you can book a flight from State of Washington to Northern Ireland (average of £67). Flying from State of Washington 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Alternative routes for Washington to Northern Ireland

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Direct flights to United Kingdom

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How does Cheapflights help users find flights from Washington to Northern Ireland?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington 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 to Northern Ireland?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Northern Ireland from Washington.

Can Cheapflights find flights from Washington to Northern Ireland with no change fees?

Certainly. Search results for flights to Northern Ireland from Washington shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

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

Not ready to book yet? You can track prices for flights from Washington to Northern Ireland on Cheapflights with our Price Alert feature and get notified when better prices are available.

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Cheap flights from Washington to Northern Ireland from £273

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 4/5. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Washington to Northern Ireland

Keep the following information in mind while searching for Washington to Northern Ireland flight deals. Data was last updated 31 March 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from Washington to Northern Ireland

Cheapest flights from Washington to Northern IrelandExplore the most affordable flight options available from Washington to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.

Explore the most affordable flight options available from Washington to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.

Cheapflights Fare Finder

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

Best time to book a flight from Washington to Northern Ireland

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

Cheapflights Insights

Everything you need to know about your flight from Washington to Northern Ireland

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 reviews from past customers who have flown Delta, KLM and Finnair from Washington to Northern Ireland. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Washington 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 cheapest airlines to fly from State of Washington to Northern Ireland one-way?

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

How can I find direct flights from Washington to Northern Ireland?

Can I find deals for business class flights from Washington to Northern Ireland?

What is the cheapest month to book a flight from State of Washington 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 to Northern Ireland

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

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Washington to Northern Ireland?

Why should you use Cheapflights to find cheap flight tickets from Washington to Northern Ireland?

Can Cheapflights find flights from Washington to Northern Ireland with no change fees?

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

100% Free

Book with Flexibility

Travel Smart

Cheapest flights from Washington to Northern Ireland
Explore the most affordable flight options available from Washington to Northern Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 31 March 2025.