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$285+ 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 2/26. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
dic. 24 — dic. 311
mié. 12/24
mié. 12/31
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 noviembre 24, 2025.

This Expedia deal was found by Cheapflights users on 11/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/276:50 pmSEA - BHD
1 stop13h 55mMultiple Airlines
sáb. 1/36:35 amBHD - SEA
1 stop12h 55mMultiple Airlines
Deal found 11/23$2,306
This Priceline deal was found by Cheapflights users on 11/23. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/271:35 pmSEA - BHD
1 stop16h 40mBritish Airways
sáb. 1/36:35 amBHD - SEA
2 stops20h 39mBritish Airways
Deal found 11/23$2,352
This Mytrip deal was found by Cheapflights users on 11/23. 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.
sáb. 12/278:10 amSEA - BFS
3 stops29h 35mMultiple Airlines
sáb. 1/310:25 pmBFS - SEA
2 stops22h 55mMultiple Airlines
Deal found 11/23$2,437
This KLM deal was found by Cheapflights users on 11/23. 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.
sáb. 12/273:05 pmSEA - BHD
1 stop17h 45mKLM
sáb. 1/36:30 amBHD - SEA
1 stop13h 20mKLM
Deal found 11/23$2,473

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 noviembre 24, 2025.

Round-trip from

$599
(Cheapflightsfares)

One-way from

$285
(Kiwi.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
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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 noviembre 24, 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

jue. 2/5

6:50 pm-6:50 pm

1 stop16h 00m

Belfast City

lun. 2/9

6:35 am-4:55 pm

1 stop18h 20m

$620

PortlandBelfast

PDX - BHD

PDXBHD

Portland

jue. 1/8

7:00 am-10:20 am

2 stops19h 20m

Belfast City

sáb. 1/17

6:35 am-7:02 pm

2 stops20h 27m

$632

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

jue. 2/5

9:55 pm-4:50 pm

2 stops34h 55m

Belfast City

lun. 2/9

5:20 pm-11:40 am

1 stop26h 20m

$645

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

jue. 2/5

7:10 am-4:50 pm

2 stops25h 40m

Belfast City

lun. 2/9

5:20 pm-11:40 am

1 stop26h 20m

$645

PortlandBelfast

PDX - BHD

PDXBHD

Portland

jue. 1/8

5:50 am-4:50 pm

2 stops27h 00m

Belfast City

sáb. 1/17

5:20 pm-11:25 am

1 stop26h 05m

$645

PortlandBelfast

PDX - BHD

PDXBHD

Portland

jue. 1/15

7:00 am-4:50 pm

2 stops25h 50m

Belfast City

lun. 1/19

5:20 pm-5:35 pm

2 stops32h 15m

$655

PortlandBelfast

PDX - BHD

PDXBHD

Portland

jue. 2/5

5:15 pm-4:50 pm

2 stops39h 35m

Belfast City

lun. 2/9

5:20 pm-5:35 pm

2 stops32h 15m

$655

PortlandBelfast

PDX - BHD

PDXBHD

Portland

jue. 2/5

7:37 pm-4:50 pm

2 stops37h 13m

Belfast City

lun. 2/9

5:20 pm-10:47 am

2 stops49h 27m

$655

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

mié. 1/7

2:35 pm-5:55 pm

2 stops19h 20m

Belfast Intl

mié. 1/14

6:30 am-5:00 pm

2 stops18h 30m

$699

PortlandBelfast

PDX - BHD

PDXBHD

Portland

jue. 1/15

10:00 am-4:50 pm

2 stops22h 50m

Belfast City

lun. 1/19

5:20 pm-6:50 pm

2 stops33h 30m

$711

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/23

Showing 1-10 of 35 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 noviembre 24, 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 noviembre 24, 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
7,535 reviews

Comfort

6.7

Overall

6.7

Boarding

6.9

Crew

7.6

Entertainment

6.4

Food

6.3

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
7,535 reviews
British Airways
6.7
Okay
7,535 reviews

Comfort

6.7

Overall

6.7

Boarding

6.9

Crew

7.6

Entertainment

6.4

Food

6.3

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, Virgin Atlantic, and Delta can get you from State of Washington to Northern Ireland in just under 16h. Your travel time can differ by up to 18h 55m. 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.

See more FAQs

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Alternative routes for Washington to Northern Ireland

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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 noviembre 24, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$737Average$951FlexibilityNo cancel feeOn-time70%

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