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 March tends to be the cheapest month to fly to Northern Ireland from State of Washington. Users have commonly found prices around £696 for the month, but tickets can be as low as £520. Due to multiple factors, prepare for potentially higher prices in August.

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.

£308+ Flights from Washington to Northern Ireland

Cheap flight deals from Washington to Northern Ireland

Round-trip from	£492
One-way from	£308
Popular in	August
Cheapest in	March

4/10-14/10
4 total stops
63h 25m total
Washington to Northern Ireland

Search Deals

23/8
2 total stops
17h 35m total
Washington to Northern Ireland

Search Deals

Highest demand for flights based on searches. 19% potential increase in price (£123 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 5% potential price decrease (£28 potential savings vs. average return price).

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 13 6월 2025.

토 4/1015:20PDX - BFS

2 stops24h 05mMultiple Airlines

화 14/1010:35BFS - PDX

2 stops39h 20mMultiple Airlines

Deal found 12/6£492

토 4/1013:12PDX - BHD

2 stops38h 18mBritish Airways

화 14/1020:20BHD - PDX

1 stop29h 15mBritish Airways

Deal found 12/6£497

수 15/1019:25PDX - BHD

1 stop15h 15mMultiple Airlines

토 25/1009:35BHD - PDX

2 stops21h 08mMultiple Airlines

Deal found 11/6£507

월 4/820:20SEA - BHD

1 stop15h 15mBritish Airways

수 20/818:15BHD - SEA

1 stop25h 20mBritish Airways

Deal found 12/6£528

화 28/1013:29SEA - BHD

2 stops17h 06mAmerican Airlines

화 4/1111:30BHD - SEA

1 stop13h 25mAmerican Airlines

Deal found 13/6£539

토 4/1015:00SEA - BHD

2 stops36h 30mIberia

화 14/1006:35BHD - SEA

1 stop12h 35mIberia

Deal found 12/6£548

월 4/817:45SEA - BHD

2 stops15h 45mMultiple Airlines

수 20/816:05BHD - SEA

1 stop27h 30mMultiple Airlines

Deal found 12/6£566

토 4/1019:00SEA - BFS

2 stops20h 25mMultiple Airlines

화 14/1019:55BFS - SEA

2 stops32h 45mMultiple Airlines

Deal found 12/6£582

월 4/819:35SEA - BHD

2 stops17h 15mAer Lingus

수 20/807:00BHD - SEA

2 stops18h 50mAer Lingus

Deal found 12/6£587

수 2/713:15PDX - BHD

1 stop19h 40mKLM

화 15/717:25BHD - PDX

1 stop25h 55mKLM

Deal found 11/6£1,155

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 13 6월 2025.

토 4/1015:20PDX - BFS

2 stops24h 05mMultiple Airlines

화 14/1010:35BFS - PDX

2 stops39h 20mMultiple Airlines

Deal found 12/6£492

토 4/1013:12PDX - BHD

2 stops38h 18mBritish Airways

화 14/1020:20BHD - PDX

1 stop29h 15mBritish Airways

Deal found 12/6£497

화 28/1013:29SEA - BHD

2 stops17h 06mAmerican Airlines

화 4/1111:30BHD - SEA

1 stop13h 25mAmerican Airlines

Deal found 13/6£539

토 4/1015:00SEA - BHD

2 stops36h 30mIberia

화 14/1006:35BHD - SEA

1 stop12h 35mIberia

Deal found 12/6£548

월 4/819:35SEA - BHD

2 stops17h 15mAer Lingus

수 20/807:00BHD - SEA

2 stops18h 50mAer Lingus

Deal found 12/6£587

수 15/1019:25PDX - BHD

1 stop15h 15mMultiple Airlines

토 25/1009:35BHD - PDX

2 stops21h 08mMultiple Airlines

Deal found 11/6£507

월 4/820:20SEA - BHD

1 stop15h 15mBritish Airways

수 20/818:15BHD - SEA

1 stop25h 20mBritish Airways

Deal found 12/6£528

수 2/713:15PDX - BHD

1 stop19h 40mKLM

화 15/717:25BHD - PDX

1 stop25h 55mKLM

Deal found 11/6£1,155

월 4/817:45SEA - BHD

2 stops15h 45mMultiple Airlines

수 20/816:05BHD - SEA

1 stop27h 30mMultiple Airlines

Deal found 12/6£566

토 4/1019:00SEA - BFS

2 stops20h 25mMultiple Airlines

화 14/1019:55BFS - SEA

2 stops32h 45mMultiple Airlines

Deal found 12/6£582

Last-minute flights from Washington to Northern Ireland
Discover last-minute flight deals from Washington to Northern Ireland. Data last updated 13 6월 2025 and is based on user searches.

금 20/617:45SEA - BHD

2 stops16h 30mBritish Airways

일 13/706:50BHD - SEA

1 stop12h 40mBritish Airways

Deal found 13/6£5,433

월 30/619:35SEA - BHD

2 stops16h 20mAer Lingus

수 9/718:50BHD - SEA

2 stops31h 00mAer Lingus

Deal found 11/6£1,104

월 30/613:30SEA - BHD

1 stop15h 25mBritish Airways

수 9/706:50BHD - SEA

1 stop12h 45mBritish Airways

Deal found 11/6£1,312

수 2/710:29PDX - BHD

2 stops21h 06mBritish Airways

화 15/706:35BHD - PDX

2 stops23h 31mBritish Airways

Deal found 11/6£967

수 2/713:15PDX - BHD

1 stop19h 40mMultiple Airlines

화 15/706:30BHD - PDX

2 stops18h 35mMultiple Airlines

Deal found 11/6£997

수 2/713:15PDX - BHD

1 stop19h 40mKLM

화 15/717:25BHD - PDX

1 stop25h 55mKLM

Deal found 11/6£1,155

토 26/715:45SEA - BFS

2 stops23h 45mMultiple Airlines

토 2/805:45BFS - SEA

3 stops44h 53mMultiple Airlines

Deal found 11/6£671

일 27/720:20SEA - BHD

1 stop13h 20mAmerican Airlines

일 3/806:50BHD - SEA

1 stop12h 40mAmerican Airlines

Deal found 11/6£640

일 27/715:20PDX - BFS

3 stops23h 00mMultiple Airlines

일 3/822:55BFS - PDX

3 stops27h 51mMultiple Airlines

Deal found 12/6£698

일 27/715:45SEA - BHD

2 stops20h 40mMultiple Airlines

일 3/807:05BHD - SEA

2 stops21h 35mMultiple Airlines

Deal found 11/6£774

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 - BFS

PDXBFS

Portland

토 4/10

15:20-23:25

2 stops24h 05m

Belfast Intl

화 14/10

10:35-17:55

2 stops39h 20m

£492

PortlandBelfast

PDX - BHD

PDXBHD

Portland

토 4/10

13:12-11:30

2 stops38h 18m

Belfast City

화 14/10

20:20-17:35

1 stop29h 15m

£497

PortlandBelfast

PDX - BHD

PDXBHD

Portland

수 15/10

19:25-18:40

1 stop15h 15m

Belfast City

토 25/10

09:35-22:43

2 stops21h 08m

£507

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

월 4/8

20:20-19:35

1 stop15h 15m

Belfast City

수 20/8

18:15-11:35

1 stop25h 20m

£528

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

화 28/10

13:29-13:35

2 stops17h 06m

Belfast City

화 4/11

11:30-16:55

1 stop13h 25m

£539

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

토 4/10

15:00-11:30

2 stops36h 30m

Belfast City

화 14/10

06:35-11:10

1 stop12h 35m

£548

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

월 4/8

17:45-17:30

2 stops15h 45m

Belfast City

수 20/8

16:05-11:35

1 stop27h 30m

£566

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

토 4/10

19:00-23:25

2 stops20h 25m

Belfast Intl

화 14/10

19:55-20:40

2 stops32h 45m

£582

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

월 4/8

19:35-20:50

2 stops17h 15m

Belfast City

수 20/8

07:00-17:50

2 stops18h 50m

£587

PortlandBelfast

PDX - BHD

PDXBHD

Portland

수 2/7

13:15-16:55

1 stop19h 40m

Belfast City

화 15/7

17:25-11:20

1 stop25h 55m

£1,155

Flights are sorted by cheapest return flights first.

Deals found on 12/6

Showing 1-10 of 12 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

KLM

7.8

Good

1,358 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Allan,Jun 2025

YYZ - AMS

I always enjoy flying KLM. Service is attentive, friendly and professional. The seat, when fully reclined is a little hard; some kind of mattress or topper would be helpful here. The dinner was really not very good …. “Meatless meatballs” tasted quite peculiar. Breakfast which consisted of an egg white omelette in flour tortilla was also rather tasteless.

KLM

7.8

Good

1,358 reviews

KLM

7.8

Good

1,358 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Allan,Jun 2025

YYZ - AMS

American Airlines

7.2

Good

10,000 reviews

KLM

7.8

Good

1,358 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Allan,Jun 2025

YYZ - AMS

Aer Lingus

7.1

Good

1,118 reviews

KLM

7.8

Good

1,358 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Allan,Jun 2025

YYZ - AMS

Iberia

7.0

Good

2,776 reviews

KLM

7.8

Good

1,358 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Allan,Jun 2025

YYZ - AMS

British Airways

6.6

Okay

7,011 reviews

KLM

7.8

Good

1,358 reviews

Check prices

Reviews

1 / 20

8.0

Excellent

Allan,Jun 2025

YYZ - AMS

Related info for your journey

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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San Francisco to Gatwick flights

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Newark to Stansted flights

Dallas/Fort Worth to Gatwick flights

George Bush Intcntl to Heathrow flights

Detroit to Heathrow flights

Sky Harbor Intl to Heathrow flights

Minneapolis to Heathrow flights

San Francisco to London City flights

Newark to Edinburgh flights

John F Kennedy Intl to Edinburgh flights

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Boston to Stansted flights

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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 £308

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 23/8. 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 13 6월 2025.

Round-trip from

One-way from

Popular in

Cheapest in

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 13 6월 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 13 6월 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

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.

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 13 6월 2025.