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Northern Ireland

$266+ 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 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Feb 6 — Feb 131
Fri 2/6
Fri 2/13
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 January 7, 2026.

Round-trip from

$577
(British Airways)

One-way from

$266
(Trip.com)

Popular in

December

Cheapest in

April

Average price

$951
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. 10% potential increase in price ($121 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($60 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 7, 2026.

This British Airways deal was found by Cheapflights users on 1/6. 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.
Sun 3/86:45 pmPDX - BHD
1 stop15h 05mBritish Airways
Tue 3/177:25 pmBHD - PDX
1 stop28h 30mBritish Airways
Deal found 1/6$577
This Cheapflightsfares deal was found by Cheapflights users on 1/7. 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.
Sat 3/76:50 pmSEA - BHD
1 stop13h 55mBritish Airways
Tue 3/176:35 amBHD - SEA
1 stop12h 55mBritish Airways
Deal found 1/7$583
This Cheapflightsfares deal was found by Cheapflights users on 1/6. 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 3/116:45 pmPDX - BHD
1 stop14h 50mBritish Airways
Mon 3/169:15 amBHD - PDX
1 stop14h 40mBritish Airways
Deal found 1/6$583
This British Airways deal was found by Cheapflights users on 1/6. 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.
Tue 3/1011:46 amPDX - BHD
2 stops20h 04mBritish Airways
Tue 3/1711:25 amBHD - PDX
2 stops19h 55mBritish Airways
Deal found 1/6$591
This oojo deal was found by Cheapflights users on 1/7. 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.
Mon 10/57:30 pmPDX - BHD
1 stop14h 00mBritish Airways
Mon 10/267:25 pmBHD - PDX
2 stops34h 34mBritish Airways
Deal found 1/7$593
This FlightHub deal was found by Cheapflights users on 1/6. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/116:45 pmPDX - BHD
1 stop12h 30mBritish Airways
Tue 3/176:35 amBHD - PDX
2 stops24h 45mBritish Airways
Deal found 1/6$599
This oojo deal was found by Cheapflights users on 1/7. 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 3/76:50 pmSEA - BHD
1 stop13h 55mBritish Airways
Wed 3/186:35 amBHD - SEA
2 stops23h 29mBritish Airways
Deal found 1/7$602
This British Airways deal was found by Cheapflights users on 1/6. 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.
Sun 3/86:45 pmPDX - BHD
1 stop15h 05mBritish Airways
Sun 3/1510:40 amBHD - PDX
1 stop13h 15mBritish Airways
Deal found 1/6$602
This British Airways deal was found by Cheapflights users on 1/6. 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 3/412:04 pmPDX - BHD
2 stops23h 06mBritish Airways
Sun 3/86:30 amBHD - PDX
1 stop17h 25mBritish Airways
Deal found 1/6$606
This British Airways deal was found by Cheapflights users on 1/4. 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.
Fri 2/206:50 pmSEA - BHD
1 stop14h 25mBritish Airways
Tue 2/246:35 amBHD - SEA
1 stop12h 55mBritish Airways
Deal found 1/4$627
This oojo deal was found by Cheapflights users on 1/6. 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.
Wed 1/146:00 amPDX - BHD
2 stops24h 15mBritish Airways
Wed 1/216:35 amBHD - PDX
2 stops21h 52mBritish Airways
Deal found 1/6$637
This American Airlines deal was found by Cheapflights users on 1/6. 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.
Wed 3/115:42 pmPDX - BHD
2 stops18h 28mAmerican Airlines
Mon 3/1611:30 amBHD - PDX
2 stops19h 45mAmerican Airlines
Deal found 1/6$639

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 January 7, 2026.
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

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 3/8

6:45 pm-4:50 pm

1 stop15h 05m

Belfast City

Wed 3/18

9:15 am-4:55 pm

1 stop14h 40m

$577

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 3/9

6:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Thu 3/19

8:00 pm-4:55 pm

1 stop27h 55m

$577

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 3/11

6:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Tue 3/17

7:25 pm-4:55 pm

1 stop28h 30m

$577

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 3/11

6:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Thu 3/19

8:00 pm-4:55 pm

1 stop27h 55m

$577

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 3/11

6:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Wed 3/18

9:15 am-4:55 pm

1 stop14h 40m

$577

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-11:10 am

1 stop13h 35m

Belfast City

Tue 3/17

11:25 am-5:55 pm

1 stop13h 30m

$583

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 3/11

6:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Mon 3/16

5:45 pm-12:20 am

2 stops37h 35m

$587

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 3/10

11:46 am-2:50 pm

2 stops20h 04m

Belfast City

Thu 3/19

10:40 am-12:15 am

2 stops20h 35m

$591

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

6:50 pm-4:45 pm

1 stop13h 55m

Belfast City

Wed 3/18

6:35 am-11:04 pm

2 stops23h 29m

$602

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 3/11

6:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Sun 3/15

10:40 am-4:55 pm

1 stop13h 15m

$602

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 22 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
No data available for this route at this time. Please check back soon.

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 05m. Your travel time can differ by up to . There are 4585 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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