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Northern Ireland

$310+ 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 3/23. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheap flight deals from Washington to Northern Ireland

Best flights from Washington to Northern Ireland
Discover carefully curated flight deals from Washington to Northern Ireland that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.

This oojo deal was found by Cheapflights users on 12/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/71:35 pmSEA - BHD
1 stop16h 40mBritish Airways
Tue 3/1711:25 amBHD - SEA
1 stop13h 30mBritish Airways
Deal found 12/14$600
This KLM deal was found by Cheapflights users on 12/15. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/141:30 pmPDX - BHD
2 stops19h 20mKLM
Wed 1/215:20 pmBHD - PDX
2 stops33h 53mKLM
Deal found 12/15$661
This Mytrip deal was found by Cheapflights users on 12/14. 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.
Wed 1/282:35 pmSEA - BFS
2 stops17h 35mMultiple Airlines
Wed 2/47:55 amBFS - SEA
2 stops17h 05mMultiple Airlines
Deal found 12/14$667
This Delta deal was found by Cheapflights users on 12/14. 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.
Fri 1/165:50 amPDX - BHD
2 stops27h 00mDelta
Sun 1/255:20 pmBHD - PDX
2 stops33h 30mDelta
Deal found 12/14$714
This oojo deal was found by Cheapflights users on 12/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/71:35 pmSEA - BHD
1 stop13h 35mBritish Airways
Wed 3/1812:25 pmBHD - SEA
1 stop12h 30mBritish Airways
Deal found 12/14$600
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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 1/125:45 pmPDX - BHD
1 stop12h 30mBritish Airways
Mon 1/196:35 amBHD - PDX
1 stop17h 20mBritish Airways
Deal found 12/15$604
This Mytrip deal was found by Cheapflights users on 12/15. 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 1/292:35 pmSEA - BFS
2 stops23h 45mMultiple Airlines
Thu 2/56:30 amBFS - SEA
2 stops18h 30mMultiple Airlines
Deal found 12/15$679
This Cheapflightsfares deal was found by Cheapflights users on 12/15. 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 1/145:45 pmPDX - BHD
1 stop12h 30mBritish Airways
Wed 1/216:35 amBHD - PDX
1 stop17h 20mBritish Airways
Deal found 12/15$604
This oojo deal was found by Cheapflights users on 12/14. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 1/165:45 pmPDX - BHD
1 stop30h 30mBritish Airways
Sun 1/259:10 amBHD - PDX
1 stop14h 45mBritish Airways
Deal found 12/14$609
This British Airways deal was found by Cheapflights users on 12/13. 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 2/115:45 pmPDX - BHD
1 stop14h 50mBritish Airways
Sun 2/1510:40 amBHD - PDX
1 stop13h 15mBritish Airways
Deal found 12/13$625
This Mytrip deal was found by Cheapflights users on 12/15. 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 4/263:40 pmSEA - BFS
2 stops23h 30mMultiple Airlines
Sun 5/106:10 amBFS - SEA
2 stops22h 18mMultiple Airlines
Deal found 12/15$940

Find 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 December 16, 2025.

Round-trip from

$600
(oojo)

One-way from

$310
(Kiwi.com)

Popular in

December

Cheapest in

April

Average price

$1,583
From Washington to Northern Ireland
Search Deals
One-way flight from Washington to Northern Ireland
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($128 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease ($59 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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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 December 16, 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 - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-2:15 pm

1 stop16h 40m

Belfast City

Tue 3/17

11:25 am-5:55 pm

1 stop13h 30m

$600

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-11:10 am

1 stop13h 35m

Belfast City

Wed 3/18

12:25 pm-5:55 pm

1 stop12h 30m

$600

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 1/12

5:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Mon 1/19

6:35 am-3:55 pm

1 stop17h 20m

$604

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 1/14

5:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Wed 1/21

6:35 am-3:55 pm

1 stop17h 20m

$604

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 1/16

5:45 pm-8:15 am

1 stop30h 30m

Belfast City

Sun 1/25

9:10 am-3:55 pm

1 stop14h 45m

$609

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 2/11

5:45 pm-4:35 pm

1 stop14h 50m

Belfast City

Sun 2/15

10:40 am-3:55 pm

1 stop13h 15m

$625

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 1/14

1:30 pm-4:50 pm

2 stops19h 20m

Belfast City

Wed 1/21

5:20 pm-7:13 pm

2 stops33h 53m

$661

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 1/28

2:35 pm-4:10 pm

2 stops17h 35m

Belfast Intl

Wed 2/4

7:55 am-5:00 pm

2 stops17h 05m

$667

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 1/29

2:35 pm-10:20 pm

2 stops23h 45m

Belfast Intl

Thu 2/5

6:30 am-5:00 pm

2 stops18h 30m

$679

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fri 1/16

5:50 am-4:50 pm

2 stops27h 00m

Belfast City

Sun 1/25

5:20 pm-6:50 pm

2 stops33h 30m

$714

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 14 results
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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 December 16, 2025.

Unlike in the afternoon, when flights are generally more expensive, you can save up to 20% on flights from State of Washington to Northern Ireland by exploring options for tickets in the evening.

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 16h 40m. 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.

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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