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Cheap flights from Washington to Northern Ireland from £395

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 15/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
10 Jan — 17 Jan1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Washington to Northern Ireland

Enter your travel dates to find the best prices.

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 11 Dezember 2025.

Do 11/1213:14PDX - BHD
2 stops23h 16mMultiple Airlines
Do 18/1206:35BHD - PDX
2 stops24h 11mMultiple Airlines
Deal found 9/12£808
Do 11/1207:05PDX - BHD
2 stops25h 45mKLM
Do 18/1217:20BHD - PDX
1 stop26h 05mKLM
Deal found 9/12£1,125
Mi 10/1209:00SEA - BHD
2 stops17h 15mMultiple Airlines
Do 11/1215:25BHD - SEA
2 stops34h 55mMultiple Airlines
Deal found 9/12£1,456
Mi 10/1209:00SEA - BHD
2 stops17h 15mBritish Airways
Do 11/1220:00BHD - SEA
1 stop23h 30mBritish Airways
Deal found 8/12£3,483

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 11 Dezember 2025.

Round-trip from

£449

One-way from

£395

Popular in

December

Cheapest in

April

Average price

£1,188
22/1-29/1
  • 22/1-29/1
  • 4 total stops
  • 39h 45m total
  • Washington to Northern Ireland
Search Deals
American Airlines
  • American Airlines
  • 15/5
  • 2 total stops
  • 19h 21m total
  • Washington to Northern Ireland
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£72 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£34 potential savings vs. average return price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customise 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 858,174 searches. Data last updated 11 Dezember 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

Sa 7/3

13:35-14:15

1 stop16h 40m

Belfast City

Di 17/3

06:35-12:30

1 stop12h 55m

£452

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sa 7/3

13:35-14:15

1 stop16h 40m

Belfast City

Mi 18/3

12:25-17:55

1 stop12h 30m

£452

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fr 30/1

18:50-17:15

1 stop14h 25m

Belfast City

Di 3/2

15:05-16:55

1 stop33h 50m

£468

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mi 11/2

17:45-14:15

1 stop12h 30m

Belfast City

So 15/2

09:10-15:55

1 stop14h 45m

£468

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Do 8/1

07:00-10:20

2 stops19h 20m

Belfast City

Mo 19/1

09:15-20:28

2 stops19h 13m

£478

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sa 7/3

07:10-16:50

2 stops25h 40m

Belfast City

Di 17/3

06:30-12:35

1 stop13h 05m

£488

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sa 7/3

07:10-16:50

2 stops25h 40m

Belfast City

Mi 18/3

06:30-12:35

1 stop13h 05m

£488

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sa 24/1

14:35-17:40

2 stops19h 05m

Belfast Intl

Sa 31/1

08:10-17:00

2 stops16h 50m

£563

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Do 8/1

16:51-20:30

2 stops19h 39m

Belfast City

Mo 19/1

06:35-15:55

1 stop17h 20m

£597

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Fr 30/1

10:33-17:15

2 stops22h 42m

Belfast City

Di 3/2

06:35-17:59

2 stops19h 24m

£629

Flights are sorted by cheapest return flights first.

Deals found on 11/12

Showing 1-10 of 16 results
1
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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 return 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?

    There are many flights that can get you from State of Washington to Northern Ireland in 16h 40m. Fly via British Airways to get the fastest option. Airlines will cover a distance of 4472 mi.

  • 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 holiday 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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Fly with Cheapflights

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How does Cheapflights help users find flights from Washington to Northern Ireland?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Washington to Northern Ireland. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.

Why should you use Cheapflights to find cheap flight tickets from Washington to Northern Ireland?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Northern Ireland from Washington.

Can Cheapflights find flights from Washington to Northern Ireland with no change fees?

Certainly. Search results for flights to Northern Ireland from Washington shown to you on Cheapflights can be narrowed down with different useful search filters, which includes flexible booking options.

Can Cheapflights notify me if prices for flights from Washington to Northern Ireland become cheaper?

Not ready to book yet? You can track prices for flights from Washington to Northern Ireland on Cheapflights with our Price Alert feature and get notified when better prices are available.

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