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Cheap flights from Washington to Northern Ireland from £274

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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
12 Jul — 19 Jul1
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 12 June 2026.

Wed 2/919:00
SEA
-
BFS
2 stops20h 10m
Multiple Airlines
Mon 7/909:15
BFS
-
SEA
2 stops34h 30m
Multiple Airlines
Deal found 10/6£655
Mon 5/1020:20
SEA
-
BHD
1 stop16h 15m
British Airways
Thu 22/1020:35
BHD
-
SEA
1 stop23h 00m
British Airways
Deal found 10/6£663
Tue 8/920:20
SEA
-
BHD
1 stop16h 15m
British Airways
Tue 15/919:30
BHD
-
SEA
2 stops35h 27m
British Airways
Deal found 9/6£668
Sun 20/920:20
SEA
-
BHD
1 stop14h 25m
British Airways
Thu 24/919:30
BHD
-
SEA
1 stop24h 05m
British Airways
Deal found 10/6£677
Sun 27/920:20
SEA
-
BHD
1 stop16h 15m
British Airways
Wed 30/918:20
BHD
-
SEA
1 stop25h 15m
British Airways
Deal found 7/6£679
Mon 5/1015:10
SEA
-
BHD
2 stops16h 20m
American Airlines
Thu 22/1006:30
BHD
-
SEA
1 stop13h 05m
American Airlines
Deal found 10/6£679
Sun 25/1015:10
SEA
-
BHD
2 stops18h 40m
British Airways
Sun 1/1106:30
BHD
-
SEA
1 stop18h 25m
British Airways
Deal found 8/6£685
Tue 8/919:00
SEA
-
BFS
3 stops20h 20m
Multiple Airlines
Tue 15/923:30
BFS
-
SEA
3 stops44h 05m
Multiple Airlines
Deal found 9/6£692
Sun 25/1019:10
SEA
-
BFS
2 stops29h 45m
Multiple Airlines
Sun 1/1107:00
BFS
-
SEA
1 stop17h 50m
Multiple Airlines
Deal found 8/6£708
Wed 28/1018:45
PDX
-
BHD
1 stop12h 30m
British Airways
Sat 7/1118:00
BHD
-
PDX
1 stop29h 55m
British Airways
Deal found 8/6£710
Thu 23/715:40
SEA
-
BFS
2 stops19h 50m
Multiple Airlines
Thu 30/706:40
BFS
-
SEA
3 stops22h 20m
Multiple Airlines
Deal found 11/6£711
Wed 28/1013:28
PDX
-
BHD
2 stops20h 07m
Multiple Airlines
Sat 7/1109:15
BHD
-
PDX
2 stops20h 40m
Multiple Airlines
Deal found 8/6£725

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 12 June 2026.

Round-trip from

£655

One-way from

£274
2/9-7/9
  • 2/9-7/9
  • 4 total stops
  • 54h 40m total
  • Washington to Northern Ireland
Search Deals
11/7
  • 11/7
  • 3 total stops
  • 41h 50m total
  • Washington to Northern Ireland
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 12 June 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

Mon 5/10

20:20-20:35

1 stop16h 15m

Belfast City

Thu 22/10

20:35-11:35

1 stop23h 00m

£663

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 20/9

20:20-18:45

1 stop14h 25m

Belfast City

Thu 24/9

19:30-11:35

1 stop24h 05m

£677

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 27/9

20:20-20:35

1 stop16h 15m

Belfast City

Wed 30/9

18:20-11:35

1 stop25h 15m

£679

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Sun 25/10

15:10-16:50

2 stops18h 40m

Belfast City

Sun 1/11

06:30-17:55

1 stop18h 25m

£685

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Sun 25/10

19:10-07:55

2 stops29h 45m

Belfast Intl

Sun 1/11

07:00-17:50

1 stop17h 50m

£708

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Tue 8/9

19:00-23:10

3 stops20h 10m

Belfast Intl

Tue 15/9

06:15-20:40

2 stops22h 25m

£712

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 28/10

13:30-16:35

2 stops20h 05m

Belfast City

Sat 7/11

18:00-15:55

1 stop29h 55m

£721

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 28/10

13:28-16:35

2 stops20h 07m

Belfast City

Sat 7/11

09:15-21:55

2 stops20h 40m

£725

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Wed 2/9

19:00-20:15

2 stops17h 15m

Belfast Intl

Mon 7/9

18:50-18:55

1 stop32h 05m

£734

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Thu 23/7

19:00-20:35

2 stops17h 35m

Belfast Intl

Thu 30/7

06:10-17:55

2 stops19h 45m

£780

Flights are sorted by cheapest return flights first.

Deals found on 11/6

Showing 1-10 of 26 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 12h 15m. Fly via British Airways, American Airlines, or Delta to get the fastest option. Airlines will cover a distance of 4585 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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Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
Newark to Gatwick flights
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John F Kennedy Intl to Stansted flights
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Boston to Heathrow flights
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Los Angeles to Heathrow flights
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San Francisco to Heathrow flights
Newark to Stansted flights
Boston to Gatwick flights
Dallas/Fort Worth to Heathrow flights
Seattle to Heathrow flights
Newark to Luton flights
Newark to London City flights
Orlando to Heathrow flights
Atlanta to Heathrow flights
Hobby to Heathrow flights
John F Kennedy Intl to Edinburgh flights
Boston to London City flights
Miami to Heathrow flights
Dulles Intl to Gatwick flights
Newark to Edinburgh flights
Los Angeles to Gatwick flights
Reagan-National to Heathrow flights
Philadelphia to Heathrow flights
Los Angeles to Stansted flights
Dulles Intl to London City flights
Boston to Stansted flights
Los Angeles to London City flights
George Bush Intcntl to Heathrow flights
Boston to Edinburgh flights
Denver to Heathrow flights
LaGuardia to Stansted flights
Baltimore to Gatwick flights
San Francisco to Gatwick flights
O'Hare Intl to Gatwick flights
San Francisco to London City flights
Reagan-National to Gatwick flights
O'Hare Intl to Stansted flights
Sky Harbor Intl to Heathrow flights
O'Hare Intl to London City flights
San Francisco to Stansted 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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