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Northern Ireland

$376+ 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 8/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Jul 5 — Jul 121
Sat 7/5
Sat 7/12
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 June 30, 2025.

Round-trip from

$686
(Trip.com)

One-way from

$376
(Kiwi.com)

Popular in

August

Cheapest in

March
From Washington to Northern Ireland
Search Deals
One-way flight from Washington to Northern Ireland
Search Deals
Highest demand for flights based on searches. 19% potential increase in price ($228 potential increase over avg. RT price).
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Cheapest flight prices on average. 5% potential price decrease ($50 potential savings vs. average RT price).
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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 June 30, 2025.

This Trip.com deal was found by Cheapflights users on 6/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/273:45 pmSEA - BFS
2 stops19h 25mMultiple Airlines
Thu 9/114:45 pmBFS - SEA
2 stops35h 55mMultiple Airlines
Deal found 6/28$686
This Trip.com deal was found by Cheapflights users on 6/28. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/277:00 pmSEA - BHD
2 stops16h 40mMultiple Airlines
Thu 9/118:15 pmBHD - SEA
2 stops32h 25mMultiple Airlines
Deal found 6/28$703
This Ovago deal was found by Cheapflights users on 6/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/2311:59 pmPDX - BHD
2 stops25h 21mBritish Airways
Sun 8/318:05 pmBHD - PDX
1 stop29h 30mBritish Airways
Deal found 6/30$712
This American Airlines deal was found by Cheapflights users on 6/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/237:00 amPDX - BHD
2 stops19h 10mMultiple Airlines
Sun 8/316:50 amBHD - PDX
2 stops19h 01mMultiple Airlines
Deal found 6/30$717
This Orbitz deal was found by Cheapflights users on 6/28. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/273:43 pmSEA - BHD
2 stops18h 57mBritish Airways
Thu 9/1112:40 pmBHD - SEA
1 stop13h 40mBritish Airways
Deal found 6/28$743
This Delta deal was found by Cheapflights users on 6/28. 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 12/37:20 amSEA - BHD
2 stops29h 40mDelta
Sun 12/75:20 pmBHD - SEA
1 stop26h 30mDelta
Deal found 6/28$864
This Mytrip deal was found by Cheapflights users on 6/29. 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.
Sun 7/273:20 pmPDX - BFS
3 stops23h 00mMultiple Airlines
Sun 8/36:45 amBFS - PDX
3 stops34h 45mMultiple Airlines
Deal found 6/29$1,027

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 June 30, 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

Wed 8/27

3:45 pm-7:10 pm

2 stops19h 25m

Belfast Intl

Thu 9/11

4:45 pm-8:40 pm

2 stops35h 55m

$686

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 8/27

7:00 pm-7:40 pm

2 stops16h 40m

Belfast City

Thu 9/11

8:15 pm-8:40 pm

2 stops32h 25m

$703

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 8/23

11:59 pm-9:20 am

2 stops25h 21m

Belfast City

Sun 8/31

8:05 pm-5:35 pm

1 stop29h 30m

$712

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sat 8/23

7:00 am-10:10 am

2 stops19h 10m

Belfast City

Sun 8/31

6:50 am-5:51 pm

2 stops19h 01m

$717

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 8/27

3:43 pm-6:40 pm

2 stops18h 57m

Belfast City

Thu 9/11

12:40 pm-6:20 pm

1 stop13h 40m

$743

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

7:20 am-9:00 pm

2 stops29h 40m

Belfast City

Sun 12/7

5:20 pm-11:50 am

1 stop26h 30m

$864

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Sun 7/27

3:20 pm-10:20 pm

3 stops23h 00m

Belfast Intl

Sun 8/3

6:45 am-9:30 am

3 stops34h 45m

$1,027

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Fri 8/15

11:30 pm-7:50 am

3 stops48h 20m

$376

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 8/26

10:38 am-1:00 pm

2 stops18h 22m

$391

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 8/26

7:25 pm-7:25 pm

1 stop16h 00m

$394

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/27

Showing 1-10 of 13 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 June 30, 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 June 30, 2025.
See what other customers who have flown with Delta, American Airlines, and 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.
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,969 reviews
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
British Airways
6.6
Okay
7,081 reviews
Delta
8.0
Very good
7,969 reviews

Overall

8.0

Comfort

7.9

Boarding

8.2

Entertainment

7.9

Crew

8.5

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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?

    To fly one-way, consider booking your trip with British Airways, which is currently one of the cheapest options available, starting at $391. American Airlines flights start at $394 while deals on Delta start at $627 one-way.

  • 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 June 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$519Average$866FlexibilityNo cancel feeOn-time70%

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