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Cheap flights from Washington to Northern Ireland from £230

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 5/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
30 May — 6 Jun1
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 30 April 2026.

Mon 5/1020:20
SEA
-
BHD
1 stop14h 25m
British Airways
Thu 22/1006:30
BHD
-
SEA
1 stop13h 05m
British Airways
Deal found 30/4£659
Sun 13/913:30
SEA
-
BHD
1 stop21h 15m
British Airways
Mon 21/919:35
BHD
-
SEA
1 stop24h 00m
British Airways
Deal found 25/4£667
Sun 18/1020:20
SEA
-
BHD
1 stop14h 25m
British Airways
Thu 22/1019:30
BHD
-
SEA
1 stop30h 55m
British Airways
Deal found 29/4£673
Sun 23/819:30
PDX
-
BHD
1 stop14h 10m
British Airways
Wed 26/820:35
BHD
-
PDX
1 stop29h 05m
British Airways
Deal found 28/4£673
Wed 9/915:12
SEA
-
BHD
2 stops16h 28m
American Airlines
Mon 14/915:20
BHD
-
SEA
1 stop28h 15m
American Airlines
Deal found 29/4£676
Wed 9/913:30
SEA
-
BHD
1 stop14h 30m
British Airways
Mon 14/919:35
BHD
-
SEA
1 stop24h 00m
British Airways
Deal found 26/4£680
Sun 8/1114:46
SEA
-
BHD
2 stops18h 04m
British Airways
Tue 17/1111:25
BHD
-
SEA
1 stop13h 30m
British Airways
Deal found 25/4£685
Wed 28/1018:45
PDX
-
BHD
1 stop14h 50m
British Airways
Mon 9/1106:35
BHD
-
PDX
1 stop17h 20m
British Airways
Deal found 27/4£694
Wed 9/915:40
SEA
-
BFS
3 stops22h 40m
Multiple Airlines
Mon 14/921:55
BFS
-
SEA
3 stops43h 45m
Multiple Airlines
Deal found 26/4£707
Wed 28/1011:42
PDX
-
BHD
2 stops19h 33m
American Airlines
Mon 9/1106:35
BHD
-
PDX
2 stops20h 40m
American Airlines
Deal found 27/4£725
Sun 8/1114:35
SEA
-
BFS
2 stops20h 20m
Multiple Airlines
Mon 16/1107:50
BFS
-
SEA
1 stop17h 00m
Multiple Airlines
Deal found 25/4£756
Sun 8/1114:35
SEA
-
BFS
2 stops20h 20m
Multiple Airlines
Wed 18/1107:40
BFS
-
SEA
1 stop17h 10m
Multiple Airlines
Deal found 25/4£759

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 30 April 2026.

Round-trip from

£659

One-way from

£230

Popular in

December

Cheapest in

October

Average price

£799
British Airways
  • British Airways
  • 5/10-22/10
  • 2 total stops
  • 27h 30m total
  • Washington to Northern Ireland
Search Deals
5/10
  • 5/10
  • 3 total stops
  • 47h 50m total
  • Washington to Northern Ireland
Search Deals
Highest demand for flights based on searches. 12% potential increase in price (£82 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 April 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 30 April 2026.
Use the filters below to find and compare flights from Washington to Northern Ireland that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 13/9

13:30-10:30

1 stop13h 00m

Belfast City

Wed 23/9

20:35-11:35

1 stop23h 00m

£673

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 18/10

20:20-18:45

1 stop14h 25m

Belfast City

Thu 22/10

12:45-11:35

1 stop30h 50m

£673

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Sun 23/8

19:30-18:45

1 stop15h 15m

Belfast City

Wed 26/8

19:40-17:40

1 stop30h 00m

£673

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 9/9

15:12-15:40

2 stops16h 28m

Belfast City

Mon 14/9

15:20-11:35

1 stop28h 15m

£676

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 5/10

11:34-12:55

2 stops17h 21m

Belfast City

Thu 22/10

06:30-18:25

1 stop19h 55m

£676

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 9/9

15:40-22:20

3 stops22h 40m

Belfast Intl

Mon 14/9

21:55-09:40

3 stops43h 45m

£707

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 15/9

20:20-18:55

1 stop14h 35m

Belfast City

Sat 19/9

19:05-11:35

1 stop24h 30m

£710

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sat 12/9

13:30-10:05

1 stop12h 35m

Belfast City

Wed 23/9

20:35-11:35

1 stop23h 00m

£710

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Tue 15/9

07:20-09:20

2 stops18h 00m

Belfast City

Thu 24/9

17:30-00:01

2 stops38h 31m

£720

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 16/9

07:20-09:20

2 stops18h 00m

Belfast City

Sun 20/9

09:45-20:29

2 stops42h 44m

£757

Flights are sorted by cheapest return flights first.

Deals found on 28/4

Showing 1-10 of 38 resultsSorted by cheapest first
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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 13h. Fly via British Airways or KLM to get the fastest option. Airlines will cover a distance of 4472 mi. Both multi-stop and direct flights can be found to your destination and back.

  • 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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Boston to Gatwick flights
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Hobby to Heathrow flights
Los Angeles to Gatwick flights
Miami to Heathrow flights
Dulles Intl to Gatwick flights
Los Angeles to Stansted flights
John F Kennedy Intl to Edinburgh flights
Boston to London City flights
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Reagan-National to Heathrow flights
Los Angeles to London City flights
Dulles Intl to London City flights
Boston to Stansted flights
Newark to Edinburgh flights
Baltimore to Gatwick flights
Orlando to Gatwick flights
Reagan-National to Gatwick flights
O'Hare Intl to Gatwick flights
Philadelphia to Heathrow flights
San Francisco to London City flights
O'Hare Intl to Stansted flights
Boston to Edinburgh flights
San Francisco to Gatwick flights
George Bush Intcntl to Heathrow flights
LaGuardia to Stansted flights
O'Hare Intl to London City flights
Seattle 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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