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Cheap flights from Washington to Northern Ireland from £211

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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
7 Sep — 14 Sep1
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 8 August 2026.

Tue 22/919:00 -
2 stops18h 05m
Tue 29/908:20 -
2 stops20h 20m
Deal found 8/8£673
Sun 15/1118:45 -
1 stop14h 05m
Wed 18/1109:15 -
1 stop15h 35m
Deal found 3/8£673
Sun 15/1117:45 -
1 stop16h 55m
Wed 18/1109:15 -
1 stop14h 35m
Deal found 3/8£673
Mon 5/1013:30 -
1 stop15h 25m
Thu 22/1012:45 -
1 stop13h 40m
Deal found 7/8£702
Mon 5/1015:14 -
2 stops16h 16m
Thu 22/1014:20 -
1 stop29h 15m
Deal found 5/8£720
Wed 9/1218:45 -
1 stop16h 25m
Wed 30/1217:40 -
1 stop25h 45m
Deal found 5/8£733
Sun 20/915:40 -
2 stops21h 20m
Sun 27/907:00 -
3 stops42h 55m
Deal found 6/8£745
Sat 5/910:56 -
2 stops23h 19m
Mon 21/919:35 -
1 stop24h 00m
Deal found 7/8£757
Tue 27/1008:35 -
2 stops18h 55m
Sun 1/1120:25 -
1 stop27h 25m
Deal found 7/8£759
Tue 27/1009:31 -
2 stops17h 59m
Sun 1/1109:10 -
2 stops18h 37m
Deal found 7/8£765
Mon 14/919:30 -
1 stop15h 15m
Sat 26/916:15 -
2 stops39h 13m
Deal found 3/8£780
Sat 5/919:00 -
2 stops18h 30m
Mon 21/908:15 -
3 stops42h 30m
Deal found 7/8£781

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 8 August 2026.

Round-trip from

£673

One-way from

£211
22/9-29/9
  • 22/9-29/9
  • 4 total stops
  • 38h 25m total
  • Washington to Northern Ireland
Search Deals
23/8
  • 23/8
  • 3 total stops
  • 44h 05m 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 8 August 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 Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 22/9

19:00-21:05

2 stops18h 05m

Belfast Intl

Tue 29/9

08:20-20:40

2 stops20h 20m

£673

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Sun 31/1

17:45-16:50

1 stop15h 05m

Belfast City

Tue 2/2

16:55-15:50

1 stop30h 55m

£681
Fastest return journey

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

13:30-12:55

1 stop15h 25m

Belfast City

Thu 22/10

12:45-18:25

1 stop13h 40m

£702

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Mon 5/10

15:14-15:30

2 stops16h 16m

Belfast City

Thu 22/10

14:20-11:35

1 stop29h 15m

£720

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Fri 29/1

17:45-14:15

1 stop12h 30m

Belfast City

Sun 7/2

06:30-15:50

1 stop17h 20m

£737

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Tue 27/10

08:35-10:30

2 stops18h 55m

Belfast City

Sun 1/11

20:25-15:50

1 stop27h 25m

£759

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sun 6/9

20:20-17:40

1 stop13h 20m

Belfast City

Sun 13/9

11:00-21:36

2 stops18h 36m

£762

PortlandBelfast

PDX Portland - BHD Belfast City

PDXBHD

Portland

Mon 14/9

11:48-15:30

2 stops19h 42m

Belfast City

Sat 26/9

19:05-23:28

2 stops36h 23m

£781

SeattleBelfast

SEA Seattle/Tacoma Intl - BFS Belfast Intl

SEABFS

Seattle/Tacoma Intl

Tue 1/9

19:00-19:40

2 stops16h 40m

Belfast Intl

Mon 7/9

08:15-11:45

2 stops35h 30m

£796

SeattleBelfast

SEA Seattle/Tacoma Intl - BHD Belfast City

SEABHD

Seattle/Tacoma Intl

Sat 5/9

13:50-16:55

1 stop19h 05m

Belfast City

Mon 21/9

17:30-11:47

1 stop26h 17m

£802

Flights are sorted by cheapest return flights first.

Deals found on 8/8

Showing 1-10 of 31 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 16h 55m. Fly via British Airways or American Airlines 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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Miami to Heathrow flights
Dulles Intl to Gatwick flights
Hobby to Heathrow flights
Dulles Intl to London City flights
Newark to Luton flights
Denver to Heathrow flights
John F Kennedy Intl to Edinburgh flights
Boston to London City flights
Newark to Edinburgh flights
Los Angeles to Gatwick flights
Philadelphia to Heathrow flights
Boston to Stansted flights
Los Angeles to Stansted flights
Baltimore to Gatwick flights
George Bush Intcntl to Heathrow flights
San Francisco to Gatwick flights
Reagan-National to Gatwick flights
O'Hare Intl to Gatwick flights
San Francisco to Stansted flights
Los Angeles to London City flights
O'Hare Intl to Stansted flights
San Francisco to London City flights
Charlotte to Heathrow flights
O'Hare Intl to London City flights
Tampa to Heathrow flights
Orlando 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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