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Northern Ireland

$368+ Cheap flights from Washington 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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Aug 31 — Sep 71
Sun 8/31
Sun 9/7
1 adult, Economy
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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 August 26, 2025.

Round-trip from

$681
(Mytrip)

One-way from

$368
(Thrive Travel)

Popular in

July

Cheapest in

March

Average price

$844
From Washington to Northern Ireland
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One-way flight from Washington to Northern Ireland
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Highest demand for flights based on searches. 9% potential increase in price ($92 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($25 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 26, 2025.

This Mytrip deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:35 pmSEA - BFS
2 stops21h 35mMultiple Airlines
Wed 11/266:30 amBFS - SEA
2 stops18h 30mMultiple Airlines
Deal found 8/24$681
This Mytrip deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/172:35 pmSEA - BHD
2 stops21h 55mMultiple Airlines
Wed 11/267:25 amBHD - SEA
2 stops17h 35mMultiple Airlines
Deal found 8/24$698
This Mytrip deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/97:00 pmSEA - BFS
2 stops17h 35mMultiple Airlines
Thu 10/166:10 amBFS - SEA
2 stops22h 30mMultiple Airlines
Deal found 8/25$703
This Cheapflightsfares deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/176:50 pmSEA - BHD
1 stop15h 45mBritish Airways
Wed 11/2612:25 pmBHD - SEA
1 stop12h 30mBritish Airways
Deal found 8/24$720
This KAYAK deal was found by Cheapflights users on 8/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/297:50 pmSEA - BHD
1 stop13h 45mBritish Airways
Wed 11/57:25 pmBHD - SEA
1 stop29h 30mBritish Airways
Deal found 8/24$749
This Cheapflightsfares deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/241:30 pmSEA - BHD
1 stop14h 25mBritish Airways
Tue 10/78:20 pmBHD - SEA
1 stop23h 15mBritish Airways
Deal found 8/25$756
This British Airways deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/36:50 pmSEA - BHD
1 stop13h 45mBritish Airways
Sun 12/710:40 amBHD - SEA
1 stop14h 15mBritish Airways
Deal found 8/25$779
This Cheapflightsfares deal was found by Cheapflights users on 8/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/251:30 pmSEA - BHD
1 stop13h 40mBritish Airways
Thu 10/26:35 amBHD - SEA
1 stop13h 00mBritish Airways
Deal found 8/26$804
This Delta deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2410:25 amSEA - BHD
2 stops22h 30mDelta
Tue 10/76:30 amBHD - SEA
2 stops19h 53mDelta
Deal found 8/25$820
This Mytrip deal was found by Cheapflights users on 8/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/2512:00 pmSEA - BFS
2 stops20h 15mMultiple Airlines
Mon 10/66:45 amBFS - SEA
2 stops21h 55mMultiple Airlines
Deal found 8/25$1,140

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Northern Ireland that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 26, 2025.
Use the filters below to find and compare flights from Washington to Northern Ireland that are best for you.

Fly from

Washington

Fly to

Northern Ireland

Route

Depart

Return

Price

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Mon 11/17

2:35 pm-8:10 pm

2 stops21h 35m

Belfast Intl

Wed 11/26

6:30 am-5:00 pm

2 stops18h 30m

$681

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 11/17

2:35 pm-8:30 pm

2 stops21h 55m

Belfast City

Wed 11/26

7:25 am-5:00 pm

2 stops17h 35m

$698

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 10/9

7:00 pm-8:35 pm

2 stops17h 35m

Belfast Intl

Thu 10/16

6:10 am-8:40 pm

2 stops22h 30m

$703

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 11/17

6:50 pm-6:35 pm

1 stop15h 45m

Belfast City

Wed 11/26

12:25 pm-4:55 pm

1 stop12h 30m

$720

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 10/29

7:50 pm-4:35 pm

1 stop13h 45m

Belfast City

Wed 11/5

7:25 pm-4:55 pm

1 stop29h 30m

$749

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/24

1:30 pm-11:55 am

1 stop14h 25m

Belfast City

Tue 10/7

8:20 pm-11:35 am

1 stop23h 15m

$756

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 10/14

1:30 pm-10:35 am

1 stop13h 05m

Belfast City

Sun 10/19

6:50 am-11:30 am

1 stop12h 40m

$779

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

6:50 pm-4:35 pm

1 stop13h 45m

Belfast City

Sun 12/7

12:10 pm-4:55 pm

1 stop12h 45m

$779

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 9/25

12:00 pm-4:15 pm

2 stops20h 15m

Belfast Intl

Mon 10/6

6:45 am-8:40 pm

2 stops21h 55m

$1,140

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sat 9/6

1:38 pm-7:40 am

2 stops58h 02m

$368

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/25

Showing 1-10 of 16 results
1
2

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 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 Washington to Northern Ireland

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

Find hourly flight availability from Washington to Northern Ireland. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 26, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from State of Washington to Northern Ireland as you normally would.

Reviews of airlines servicing Northern Ireland

Get insights into the airlines that provide service to Northern Ireland. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Northern Ireland. Reviews last updated August 26, 2025.
See what other customers who have flown with British Airways from Washington to Northern Ireland have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
British Airways
6.7
Okay
7,309 reviews

Entertainment

6.4

Food

6.3

Boarding

6.9

Comfort

6.7

Crew

7.6

Overall

6.7

Reviews

1 / 20
4.0
Okay

Anonymous,May 2025

LAX - LHR

Entertainment system did not work. Seems like Wi-Fi should have been comped at hat point. Boarding at Marco Polo in Venice was terrible. Insisted on gate checking our bag but not others! Connection was confused and flight was very late.
British Airways
6.7
Okay
7,309 reviews
British Airways
6.7
Okay
7,309 reviews

Entertainment

6.4

Food

6.3

Boarding

6.9

Comfort

6.7

Crew

7.6

Overall

6.7

Reviews

1 / 20
4.0
Okay

Anonymous,May 2025

LAX - LHR

Entertainment system did not work. Seems like Wi-Fi should have been comped at hat point. Boarding at Marco Polo in Venice was terrible. Insisted on gate checking our bag but not others! Connection was confused and flight was very late.

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.

  • How long is the flight from State of Washington to Northern Ireland?

    British Airways can get you from State of Washington to Northern Ireland in just under 15h 45m. Your travel time can differ by up to . There are 4472 mi between State of Washington and Northern Ireland.

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

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Alternative routes for Washington to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Washington to Northern Ireland

Discover the top airline that operate flights from Washington to Northern Ireland. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated August 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$737Average$951FlexibilityNo cancel feeOn-time70%

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