Find flights
When to book
FAQs

Cheap flights from Washington to Northern Ireland from £205

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 15/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BFS
10 Apr — 17 Apr1
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 March 2026.

Tue 21/415:40
SEA
-
BFS
2 stops15h 35m
Multiple Airlines
Tue 28/407:35
BFS
-
SEA
2 stops18h 20m
Multiple Airlines
Deal found 7/3£490
Tue 27/1014:25
SEA
-
BHD
1 stop14h 05m
British Airways
Mon 2/1119:25
BHD
-
SEA
1 stop24h 05m
British Airways
Deal found 10/3£555
Sun 1/1118:50
SEA
-
BHD
1 stop14h 00m
British Airways
Wed 4/1106:35
BHD
-
SEA
1 stop18h 20m
British Airways
Deal found 9/3£559
Sun 27/913:30
SEA
-
BHD
1 stop13h 00m
British Airways
Thu 1/1006:30
BHD
-
SEA
1 stop13h 05m
British Airways
Deal found 9/3£562
Mon 7/919:30
PDX
-
BHD
1 stop15h 55m
British Airways
Wed 23/920:35
BHD
-
PDX
1 stop29h 05m
British Airways
Deal found 7/3£562
Sun 1/1118:50
SEA
-
BHD
1 stop14h 00m
Multiple Airlines
Wed 4/1109:15
BHD
-
SEA
2 stops21h 50m
Multiple Airlines
Deal found 9/3£571
Wed 22/419:00
SEA
-
BHD
2 stops16h 40m
Multiple Airlines
Wed 29/407:00
BHD
-
SEA
2 stops21h 40m
Multiple Airlines
Deal found 8/3£573
Tue 21/415:30
PDX
-
BFS
2 stops21h 25m
Multiple Airlines
Tue 28/408:20
BFS
-
PDX
2 stops41h 40m
Multiple Airlines
Deal found 7/3£575
Mon 6/413:05
PDX
-
BHD
1 stop12h 15m
Virgin Atlantic
Mon 13/417:30
BHD
-
PDX
1 stop25h 40m
Virgin Atlantic
Deal found 8/3£580
Tue 8/919:30
PDX
-
BHD
1 stop16h 10m
British Airways
Tue 22/919:30
BHD
-
PDX
1 stop30h 10m
British Airways
Deal found 7/3£581
Tue 8/919:30
PDX
-
BHD
1 stop14h 05m
British Airways
Wed 23/910:05
BHD
-
PDX
1 stop15h 35m
British Airways
Deal found 7/3£585
Mon 6/413:05
PDX
-
BHD
1 stop12h 15m
KLM
Mon 13/417:30
BHD
-
PDX
2 stops31h 40m
KLM
Deal found 8/3£587

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 March 2026.

Round-trip from

£490

One-way from

£205

Popular in

December

Cheapest in

October

Average price

£612
21/4-28/4
  • 21/4-28/4
  • 4 total stops
  • 33h 55m total
  • Washington to Northern Ireland
Search Deals
British Airways
  • British Airways
  • 15/7
  • 2 total stops
  • 22h 00m total
  • Washington to Northern Ireland
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£100 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£32 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 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 11 March 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

PortlandBelfast

PDX - BFS

PDXBFS

Portland

Tue 21/4

15:30-20:55

2 stops21h 25m

Belfast Intl

Tue 28/4

08:20-18:00

2 stops41h 40m

£575

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 8/4

13:05-09:20

1 stop12h 15m

Belfast City

Wed 15/4

17:30-11:10

1 stop25h 40m

£580

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Mon 6/4

13:05-09:20

1 stop12h 15m

Belfast City

Mon 13/4

17:30-17:10

2 stops31h 40m

£587

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Mon 13/4

20:20-18:45

1 stop14h 25m

Belfast City

Mon 20/4

19:35-11:35

1 stop24h 00m

£597

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 22/4

13:30-12:00

1 stop14h 30m

Belfast City

Wed 29/4

06:30-11:35

1 stop13h 05m

£603

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Wed 8/4

13:23-15:40

2 stops18h 17m

Belfast City

Wed 15/4

20:35-22:56

2 stops34h 21m

£604

SeattleBelfast

SEA - BFS

SEABFS

Seattle/Tacoma Intl

Tue 21/4

15:40-19:50

3 stops20h 10m

Belfast Intl

Tue 28/4

08:20-20:40

2 stops20h 20m

£623

PortlandBelfast

PDX - BHD

PDXBHD

Portland

Thu 9/4

13:05-09:20

1 stop12h 15m

Belfast City

Thu 16/4

09:50-11:10

1 stop33h 20m

£632

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Thu 6/8

13:30-10:10

1 stop12h 40m

Belfast City

Tue 18/8

09:40-21:38

2 stops19h 58m

£643

SeattleBelfast

SEA - BHD

SEABHD

Seattle/Tacoma Intl

Wed 29/4

20:20-18:45

1 stop14h 25m

Belfast City

Sun 3/5

16:40-11:35

1 stop26h 55m

£644

Flights are sorted by cheapest return flights first.

Deals found on 9/3

Showing 1-10 of 43 resultsSorted by cheapest first
1
2
3
...
5

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 Virgin Atlantic, KLM, or British Airways 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Washington to Northern Ireland

See prices for flight routes from nearby airports that may be better suited for you.
John F Kennedy Intl to Heathrow flights
Newark to Heathrow flights
John F Kennedy Intl to Gatwick flights
Boston to Heathrow flights
John F Kennedy Intl to Stansted flights
LaGuardia to Heathrow flights
Newark to Gatwick flights
John F Kennedy Intl to London City flights
Los Angeles to Heathrow flights
Dulles Intl to Heathrow flights
LaGuardia to Gatwick flights
O'Hare Intl to Heathrow flights
Dallas/Fort Worth to Heathrow flights
San Francisco to Heathrow flights
Baltimore to Heathrow flights
Seattle to Heathrow flights
Newark to Stansted flights
Boston to Gatwick flights
Newark to Luton flights
Newark to London City flights
Orlando to Heathrow flights
Atlanta to Heathrow flights
Boston to London City flights
Miami to Heathrow flights
LaGuardia to Stansted flights
Hobby to Heathrow flights
Dulles Intl to Gatwick flights
Boston to Stansted flights
Reagan-National to Heathrow flights
John F Kennedy Intl to Edinburgh flights
Denver to Heathrow flights
Dulles Intl to London City flights
Philadelphia to Heathrow flights
Newark to Edinburgh flights
Los Angeles to Stansted flights
Baltimore to Gatwick flights
George Bush Intcntl to Heathrow flights
Los Angeles to Gatwick flights
Reagan-National to Gatwick flights
O'Hare Intl to Gatwick flights
Los Angeles to London City flights
O'Hare Intl to Stansted flights
O'Hare Intl to London City flights
Minneapolis to Heathrow flights
Boston to Edinburgh flights
San Francisco to Gatwick flights
Raleigh to Heathrow flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.