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Cheap flights from Washington to Northern Ireland from £200

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 6/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
25 Feb — 4 Mar1
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 26 January 2026.

Sat 7/318:50
SEA
-
BHD
1 stop13h 55m
British Airways
Wed 18/306:35
BHD
-
SEA
1 stop18h 20m
British Airways
Deal found 26/1£456
Wed 4/317:45
PDX
-
BHD
1 stop12h 30m
British Airways
Sun 8/315:10
BHD
-
PDX
1 stop32h 45m
British Airways
Deal found 24/1£459
Tue 10/315:35
SEA
-
BFS
2 stops23h 15m
Multiple Airlines
Tue 17/308:35
BFS
-
SEA
2 stops16h 25m
Multiple Airlines
Deal found 24/1£503
Fri 3/405:30
SEA
-
BHD
2 stops26h 00m
British Airways
Fri 10/406:30
BHD
-
SEA
1 stop13h 05m
British Airways
Deal found 24/1£549
Fri 3/405:30
SEA
-
BHD
2 stops28h 40m
British Airways
Mon 20/418:30
BHD
-
SEA
1 stop25h 05m
British Airways
Deal found 25/1£566
Sat 7/321:40
SEA
-
BHD
2 stops35h 10m
British Airways
Tue 17/319:25
BHD
-
SEA
2 stops34h 39m
British Airways
Deal found 25/1£590
Fri 3/413:54
SEA
-
BHD
2 stops17h 36m
American Airlines
Mon 20/411:35
BHD
-
SEA
2 stops20h 04m
American Airlines
Deal found 25/1£599
Thu 12/315:00
SEA
-
BFS
2 stops22h 25m
Multiple Airlines
Thu 19/309:05
BFS
-
SEA
2 stops35h 05m
Multiple Airlines
Deal found 26/1£601
Wed 25/207:15
SEA
-
BHD
2 stops19h 00m
British Airways
Sun 1/315:10
BHD
-
SEA
1 stop33h 45m
British Airways
Deal found 25/1£609
Fri 20/319:50
SEA
-
BHD
1 stop14h 25m
British Airways
Wed 1/406:30
BHD
-
SEA
1 stop13h 05m
British Airways
Deal found 25/1£652
Tue 10/315:45
PDX
-
BFS
2 stops17h 15m
Multiple Airlines
Tue 17/316:30
BFS
-
PDX
3 stops32h 30m
Multiple Airlines
Deal found 24/1£717
Fri 20/306:40
PDX
-
BHD
2 stops20h 50m
British Airways
Mon 30/319:35
BHD
-
PDX
2 stops36h 45m
British Airways
Deal found 25/1£722

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 26 January 2026.

Round-trip from

£456

One-way from

£200

Popular in

December

Cheapest in

April

Average price

£697
British Airways
  • British Airways
  • 7/3-18/3
  • 2 total stops
  • 32h 15m total
  • Washington to Northern Ireland
Search Deals
6/4
  • 6/4
  • 2 total stops
  • 21h 10m total
  • Washington to Northern Ireland
Search Deals
Highest demand for flights based on searches. 10% potential increase in price (£65 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 6% potential price decrease (£33 potential savings vs. average return price).
Search Deals
Average for round-trip flights in January 2026
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 26 January 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

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

13:35-14:15

1 stop16h 40m

Belfast City

Tue 17/3

06:35-12:30

1 stop12h 55m

£456

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 7/3

18:50-16:45

1 stop13h 55m

Belfast City

Wed 18/3

06:35-17:55

1 stop18h 20m

£456

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 25/2

18:50-16:35

1 stop13h 45m

Belfast City

Sun 1/3

17:35-16:55

1 stop31h 20m

£459

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 4/3

18:50-16:35

1 stop13h 45m

Belfast City

Sun 8/3

17:35-17:55

1 stop31h 20m

£459

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 4/3

17:45-14:15

1 stop12h 30m

Belfast City

Sun 8/3

15:10-16:55

1 stop32h 45m

£459

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Tue 10/3

15:35-21:50

2 stops23h 15m

Belfast Intl

Tue 17/3

08:35-18:00

2 stops16h 25m

£503

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 3/4

05:30-15:30

2 stops26h 00m

Belfast City

Fri 10/4

06:30-11:35

1 stop13h 05m

£549

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Fri 3/4

05:30-18:10

2 stops28h 40m

Belfast City

Mon 20/4

18:30-11:35

1 stop25h 05m

£566

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 12/3

15:00-20:25

2 stops22h 25m

Belfast Intl

Thu 19/3

09:05-13:10

2 stops35h 05m

£601

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Tue 10/3

15:45-16:00

2 stops17h 15m

Belfast Intl

Tue 17/3

16:30-18:00

3 stops32h 30m

£717

Flights are sorted by cheapest return flights first.

Deals found on 24/1

Showing 1-10 of 23 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 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

How much does it cost for a return flight from State of Washington to Northern Ireland?

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

Browse thousands of different options on Cheapflights for your next trip

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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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Newark to Stansted flights
Boston to London City flights
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Philadelphia to Heathrow flights
Los Angeles to Gatwick flights
O'Hare Intl to Gatwick flights
Dulles Intl to London City flights
Baltimore to Gatwick flights
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Minneapolis to Heathrow flights
John F Kennedy Intl to Edinburgh flights
San Francisco to Gatwick flights
O'Hare Intl to London City flights
Newark to Edinburgh flights
Los Angeles to Stansted flights
Boston to Stansted flights
Reagan-National to Gatwick flights
Los Angeles to London City flights
O'Hare Intl to Stansted flights
Austin to Heathrow flights
Tampa to Heathrow flights
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Dallas/Fort Worth to Gatwick flights

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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