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Northern Ireland

$341+ 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 10/14. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
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 September 17, 2025.

Round-trip from

$687
(Delta)

One-way from

$341
(Kiwi.com)

Popular in

December

Cheapest in

March

Average price

$985
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. 7% potential increase in price ($72 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($29 potential savings vs. average RT price).
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Average for round-trip flights in September 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 September 17, 2025.

This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/81:30 pmPDX - BHD
2 stops23h 45mDelta
Sun 10/126:30 amBHD - PDX
1 stop12h 30mDelta
Deal found 9/17$687
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/35:40 pmSEA - BHD
1 stop15h 15mDelta
Fri 10/106:30 amBHD - SEA
1 stop13h 20mDelta
Deal found 9/17$722
This Mytrip deal was found by Cheapflights users on 9/15. 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 10/133:45 pmSEA - BFS
2 stops20h 40mMultiple Airlines
Mon 10/206:10 amBFS - SEA
2 stops22h 30mMultiple Airlines
Deal found 9/15$723
This British Airways deal was found by Cheapflights users on 9/15. 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 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 stop16h 20mBritish Airways
Sun 12/75:35 pmBHD - SEA
1 stop31h 20mBritish Airways
Deal found 9/15$743
This American Airlines deal was found by Cheapflights users on 9/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/33:00 pmSEA - BHD
2 stops19h 15mAmerican Airlines
Fri 10/1011:55 amBHD - SEA
2 stops19h 01mAmerican Airlines
Deal found 9/16$757
This Delta deal was found by Cheapflights users on 9/17. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/95:40 pmSEA - BHD
1 stop19h 35mDelta
Mon 10/136:30 amBHD - SEA
1 stop13h 20mDelta
Deal found 9/17$772
This KLM deal was found by Cheapflights users on 9/16. 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 10/35:40 pmSEA - BHD
1 stop15h 15mKLM
Fri 10/106:30 amBHD - SEA
1 stop13h 20mKLM
Deal found 9/16$779
This Delta deal was found by Cheapflights users on 9/16. 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 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 12/76:30 amBHD - SEA
2 stops23h 51mDelta
Deal found 9/16$794
This FlightHub deal was found by Cheapflights users on 9/17. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/91:30 pmSEA - BHD
1 stop21h 15mBritish Airways
Mon 10/137:30 pmBHD - SEA
2 stops33h 16mBritish Airways
Deal found 9/17$818
This Cheapflightsfares deal was found by Cheapflights users on 9/17. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:00 amPDX - BHD
2 stops20h 55mBritish Airways
Sun 10/128:05 pmBHD - PDX
2 stops35h 03mBritish Airways
Deal found 9/17$980
This Mytrip deal was found by Cheapflights users on 9/17. 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.
Mon 9/223:45 pmSEA - BFS
2 stops20h 40mMultiple Airlines
Fri 9/266:05 amBFS - SEA
2 stops22h 35mMultiple Airlines
Deal found 9/17$1,073
This Mytrip deal was found by Cheapflights users on 9/16. 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.
Fri 10/313:00 pmSEA - BFS
2 stops17h 10mMultiple Airlines
Fri 11/77:50 amBFS - SEA
3 stops41h 15mMultiple Airlines
Deal found 9/16$1,167

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 September 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

Wed 10/8

1:30 pm-9:15 pm

2 stops23h 45m

Belfast City

Sun 10/12

6:30 am-11:00 am

1 stop12h 30m

$687

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-2:15 pm

1 stop16h 40m

Belfast City

Wed 3/18

11:25 am-5:55 pm

1 stop13h 30m

$703

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

$703

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-12:49 am

2 stops20h 24m

$714

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:35 pm-11:10 am

1 stop13h 35m

Belfast City

Wed 3/18

11:25 am-12:49 am

2 stops20h 24m

$716

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 3/7

1:34 pm-2:15 pm

2 stops16h 41m

Belfast City

Tue 3/17

6:35 am-11:08 pm

2 stops23h 33m

$722

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 10/3

5:40 pm-4:55 pm

1 stop15h 15m

Belfast City

Fri 10/10

6:30 am-11:50 am

1 stop13h 20m

$722

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Mon 10/13

3:45 pm-8:25 pm

2 stops20h 40m

Belfast Intl

Mon 10/20

6:10 am-8:40 pm

2 stops22h 30m

$723

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 12/3

6:50 pm-7:10 pm

1 stop16h 20m

Belfast City

Sun 12/7

5:35 pm-4:55 pm

1 stop31h 20m

$743

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Mon 9/22

3:45 pm-8:25 pm

2 stops20h 40m

Belfast Intl

Fri 9/26

6:05 am-8:40 pm

2 stops22h 35m

$1,073

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

Showing 1-10 of 30 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 September 17, 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 September 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
7,367 reviews

Overall

6.7

Boarding

6.9

Food

6.3

Comfort

6.7

Crew

7.6

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
7,367 reviews
British Airways
6.7
Okay
7,367 reviews

Overall

6.7

Boarding

6.9

Food

6.3

Comfort

6.7

Crew

7.6

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?

    Delta and Finnair can get you from State of Washington to Northern Ireland in just under 16h 40m. Your travel time can differ by up to 7h 05m. There are 4472 mi between State of Washington and Northern Ireland. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • 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 September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$737Average$951FlexibilityNo cancel feeOn-time70%

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