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Northern Ireland

$345+ 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 3/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Dec 17 — Dec 241
Wed 12/17
Wed 12/24
1 adult, Economy
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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 November 17, 2025.

This Mytrip deal was found by Cheapflights users on 11/15. 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.
Mon 12/12:35 pmSEA - BHD
2 stops21h 55mMultiple Airlines
Tue 12/97:20 amBHD - SEA
2 stops17h 40mMultiple Airlines
Deal found 11/15$761
This Cheapflightsfares deal was found by Cheapflights users on 11/15. 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 12/16:50 pmSEA - BHD
1 stop13h 15mBritish Airways
Tue 12/911:25 amBHD - SEA
1 stop13h 30mBritish Airways
Deal found 11/15$791
This British Airways deal was found by Cheapflights users on 11/16. 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 stop28h 40mBritish Airways
Sun 12/78:25 pmBHD - SEA
1 stop28h 30mBritish Airways
Deal found 11/16$821
This Virgin Atlantic deal was found by Cheapflights users on 11/16. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/37:20 amSEA - BHD
2 stops25h 30mVirgin Atlantic
Sun 12/75:20 pmBHD - SEA
1 stop26h 30mVirgin Atlantic
Deal found 11/16$837
This KLM deal was found by Cheapflights users on 11/16. 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.
Fri 11/281:25 pmPDX - BHD
1 stop23h 35mKLM
Fri 12/56:30 amBHD - PDX
1 stop12h 55mKLM
Deal found 11/16$842
This Booking.com deal was found by Cheapflights users on 11/14. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/152:46 pmSEA - BHD
2 stops42h 04mBritish Airways
Sat 11/223:05 pmBHD - SEA
2 stops40h 13mBritish Airways
Deal found 11/14$916
This American Airlines deal was found by Cheapflights users on 11/14. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/1412:59 amSEA - BHD
2 stops29h 16mMultiple Airlines
Sat 11/229:15 amBHD - SEA
2 stops22h 03mMultiple Airlines
Deal found 11/14$1,129
This Mytrip deal was found by Cheapflights users on 11/17. 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.
Tue 11/183:10 pmSEA - BFS
3 stops21h 05mMultiple Airlines
Tue 11/259:35 pmBFS - SEA
2 stops27h 25mMultiple Airlines
Deal found 11/17$1,133
This Mytrip deal was found by Cheapflights users on 11/16. 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 12/3110:05 amSEA - BFS
3 stops22h 10mMultiple Airlines
Wed 1/78:20 amBFS - SEA
2 stops35h 50mMultiple Airlines
Deal found 11/16$1,496
This Mytrip deal was found by Cheapflights users on 11/17. 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 12/178:05 pmSEA - BFS
2 stops18h 25mMultiple Airlines
Sat 12/2710:25 pmBFS - SEA
2 stops27h 55mMultiple Airlines
Deal found 11/17$1,729
This Mytrip deal was found by Cheapflights users on 11/17. 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 12/1810:44 amSEA - BFS
3 stops25h 41mMultiple Airlines
Sun 12/287:10 amBFS - SEA
2 stops19h 10mMultiple Airlines
Deal found 11/17$2,100
This Mytrip deal was found by Cheapflights users on 11/17. 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 12/218:05 pmSEA - BFS
2 stops14h 50mMultiple Airlines
Tue 12/305:35 pmBFS - SEA
2 stops32h 45mMultiple Airlines
Deal found 11/17$2,289

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 November 17, 2025.

Round-trip from

$631
(British Airways)

One-way from

$345
(Trip.com)

Popular in

June

Cheapest in

March

Average price

$807
From Washington to Northern Ireland
Search Deals
One-way flight from Washington to Northern Ireland
Search Deals
Highest demand for flights based on searches. 15% potential increase in price ($175 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($39 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

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 November 17, 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

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 1/19

5:45 pm-2:15 pm

1 stop12h 30m

Belfast City

Thu 1/29

11:05 am-11:32 pm

2 stops20h 27m

$631

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 1/19

7:38 am-10:40 am

2 stops19h 02m

Belfast City

Thu 1/29

10:40 am-8:47 pm

2 stops18h 07m

$633

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 4/27

7:30 pm-3:40 pm

1 stop12h 10m

Belfast City

Fri 5/15

11:55 am-5:40 pm

1 stop13h 45m

$686

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 4/26

7:30 pm-6:45 pm

1 stop15h 15m

Belfast City

Tue 5/12

9:35 am-5:40 pm

1 stop16h 05m

$686

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 4/27

7:30 pm-3:40 pm

1 stop12h 10m

Belfast City

Mon 5/11

6:30 pm-5:40 pm

1 stop31h 10m

$686

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 4/27

7:30 pm-7:35 pm

1 stop16h 05m

Belfast City

Wed 5/13

10:00 am-5:40 pm

1 stop15h 40m

$686

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 4/29

7:30 pm-8:45 am

1 stop29h 15m

Belfast City

Fri 5/15

6:35 am-5:40 pm

1 stop19h 05m

$696

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 4/29

7:30 pm-8:45 am

1 stop29h 15m

Belfast City

Thu 5/14

12:40 pm-5:40 pm

1 stop13h 00m

$696

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 4/29

7:30 pm-8:45 am

1 stop29h 15m

Belfast City

Mon 5/11

3:25 pm-5:40 pm

1 stop34h 15m

$696

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Tue 4/28

6:30 am-1:00 pm

2 stops22h 30m

Belfast City

Tue 5/12

9:35 am-5:40 pm

1 stop16h 05m

$702

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/16

Showing 1-10 of 28 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 November 17, 2025.

Unlike in the morning, when flights are generally more expensive, you can save up to 34% on flights from State of Washington to Northern Ireland by exploring options for tickets in the evening.

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 November 17, 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
7,528 reviews

Overall

6.7

Food

6.3

Boarding

6.9

Crew

7.6

Comfort

6.7

Entertainment

6.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.
British Airways
6.7
Okay
7,528 reviews
British Airways
6.7
Okay
7,528 reviews

Overall

6.7

Food

6.3

Boarding

6.9

Crew

7.6

Comfort

6.7

Entertainment

6.4

Reviews

1 / 20
8.0
Excellent

Anonymous,Aug 2025

IAD - LHR

The plane had to load and unload passengers not through a jet way but out on the tarmac at Heathrow. The steps were steep. We weren't expecting to have to carry our luggage up and down stairs.

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 12h 30m. 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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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 November 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$737Average$951FlexibilityNo cancel feeOn-time70%

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