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Cheap flights from Northern Ireland to Washington from £361

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.
BFS — SEA
26 May — 2 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Northern Ireland to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Northern Ireland to Washington
Explore the most affordable flight options available from Northern Ireland to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 26 April 2026.

Wed 20/506:15
BFS
-
SEA
3 stops35h 25m
Multiple Airlines
Tue 2/615:40
SEA
-
BFS
3 stops23h 40m
Multiple Airlines
Deal found 23/4£633
Tue 1/906:30
BHD
-
SEA
1 stop13h 05m
British Airways
Tue 22/920:20
SEA
-
BHD
1 stop13h 15m
British Airways
Deal found 23/4£692
Thu 5/1115:05
BHD
-
SEA
2 stops40h 13m
British Airways
Sun 8/1111:42
SEA
-
BHD
2 stops38h 58m
British Airways
Deal found 23/4£747
Tue 1/908:20
BFS
-
SEA
2 stops17h 35m
Multiple Airlines
Tue 22/915:40
SEA
-
BFS
3 stops23h 40m
Multiple Airlines
Deal found 23/4£749
Sat 6/606:20
BFS
-
SEA
2 stops17h 40m
Multiple Airlines
Sat 13/618:15
SEA
-
BFS
2 stops20h 25m
Multiple Airlines
Deal found 22/4£750
Wed 20/506:30
BHD
-
SEA
1 stop13h 05m
British Airways
Tue 2/613:30
SEA
-
BHD
1 stop13h 15m
British Airways
Deal found 23/4£768
Thu 14/512:45
BHD
-
SEA
2 stops17h 53m
American Airlines
Tue 19/513:30
SEA
-
BHD
1 stop13h 15m
American Airlines
Deal found 26/4£768
Sun 7/607:10
BFS
-
SEA
2 stops18h 00m
Multiple Airlines
Sun 14/619:10
SEA
-
BFS
2 stops18h 20m
Multiple Airlines
Deal found 23/4£782
Thu 21/514:50
BFS
-
SEA
1 stop36h 00m
Multiple Airlines
Wed 3/610:30
SEA
-
BFS
2 stops24h 45m
Multiple Airlines
Deal found 23/4£785
Sat 23/520:15
BFS
-
SEA
1 stop30h 35m
Multiple Airlines
Fri 5/610:30
SEA
-
BFS
2 stops22h 00m
Multiple Airlines
Deal found 23/4£785
Fri 22/519:55
BFS
-
SEA
1 stop30h 55m
Multiple Airlines
Wed 3/610:30
SEA
-
BFS
2 stops24h 45m
Multiple Airlines
Deal found 23/4£786
Thu 21/521:25
BFS
-
SEA
1 stop29h 25m
Multiple Airlines
Thu 4/609:02
SEA
-
BFS
2 stops29h 58m
Multiple Airlines
Deal found 23/4£805

Find flight deals from Northern Ireland to Washington

Keep the following information in mind while searching for Northern Ireland to Washington flight deals. Data was last updated 26 April 2026.

Round-trip from

£633

One-way from

£361
20/5-2/6
  • 20/5-2/6
  • 6 total stops
  • 59h 05m total
  • Northern Ireland to Washington
Search Deals
15/7
  • 15/7
  • 3 total stops
  • 59h 05m total
  • Northern Ireland to Washington
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Northern Ireland to Washington 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 April 2026.
Use the filters below to find and compare flights from Northern Ireland to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 6/6

06:20-16:00

2 stops17h 40m

Seattle/Tacoma Intl

Sat 13/6

18:15-22:40

2 stops20h 25m

£750

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 20/5

08:15-20:40

2 stops20h 25m

Seattle/Tacoma Intl

Tue 2/6

15:40-20:55

2 stops21h 15m

£783

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 23/5

20:15-18:50

1 stop30h 35m

Seattle/Tacoma Intl

Fri 5/6

10:30-16:30

2 stops22h 00m

£785

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 22/5

19:55-18:50

1 stop30h 55m

Seattle/Tacoma Intl

Wed 3/6

10:30-19:15

2 stops24h 45m

£786
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 14/5

09:50-20:43

2 stops18h 53m

Seattle/Tacoma Intl

Tue 19/5

10:35-09:20

2 stops14h 45m

£803

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Fri 22/5

19:55-18:50

1 stop30h 55m

Seattle/Tacoma Intl

Thu 4/6

09:02-23:00

2 stops29h 58m

£805

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 21/5

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Sat 30/5

20:20-20:30

1 stop16h 10m

£821

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 22/5

19:35-11:35

1 stop24h 00m

Seattle/Tacoma Intl

Sat 30/5

20:20-19:20

1 stop15h 00m

£821

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 19/5

20:25-11:35

1 stop23h 10m

Seattle/Tacoma Intl

Sat 30/5

13:30-10:05

1 stop12h 35m

£845

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 17/5

20:10-11:35

1 stop23h 25m

Seattle/Tacoma Intl

Sat 30/5

13:30-10:05

1 stop12h 35m

£845

Flights are sorted by cheapest return flights first.

Deals found on 24/4

Showing 1-10 of 33 resultsSorted by cheapest first
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Best time to book a flight from Northern Ireland to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Northern Ireland 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 Northern Ireland to Washington
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Washington

Get insights into the airlines that provide service to Washington. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Washington. Reviews last updated 26 April 2026.
Read through reviews of airlines operating flights from Northern Ireland to Washington, such as American Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,672 reviews
Check prices

Food

6.4

Crew

7.9

Entertainment

6.9

Comfort

7.2

Overall

7.1

Boarding

7.5

Reviews

1 / 20
4.0
Okay

Elizabeth,Mar 2026

ORD - MIA

Staff was rude and flight attendants 2 out of 3 looked like they had just been thru a hurricane.
American Airlines
7.1
Good
11,672 reviews
American Airlines
7.1
Good
11,672 reviews
Check prices

Food

6.4

Crew

7.9

Entertainment

6.9

Comfort

7.2

Overall

7.1

Boarding

7.5

Reviews

1 / 20
4.0
Okay

Elizabeth,Mar 2026

ORD - MIA

Staff was rude and flight attendants 2 out of 3 looked like they had just been thru a hurricane.

Related info for your journey

Find useful and relevant information for your journey from Northern Ireland to Washington. 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 Northern Ireland to State of Washington?

    For as low as £803, KLM can have you in State of Washington from Northern Ireland in 18h 53m. The distance between Northern Ireland and State of Washington is about 4472 mi. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

  • Can I find deals for flights from Northern Ireland to Washington that include hotel bookings?

    Yes. In addition to deals on Northern Ireland to Washington flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Northern Ireland to Washington?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to Washington.

  • Can I find deals for business class flights from Northern Ireland to Washington?

    Yes. Cheapflights offers flight deals from Northern Ireland to Washington 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 Northern Ireland to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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Top airline flying from Northern Ireland to Washington

Discover the top airline that operate flights from Northern Ireland to Washington. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 26 April 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£555Average£555FlexibilityNo cancel feeOn-time71%
Search American Airlines 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 Northern Ireland to Washington?

Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Northern Ireland to Washington. 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 Northern Ireland to Washington?

Millions of users choose and trust Cheapflights to book the best flight deals from Northern Ireland to Washington for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

Can Cheapflights find flights from Northern Ireland to Washington with no change fees?

Yes, we can. To see specific flights from Northern Ireland to Washington with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from Northern Ireland to Washington become cheaper?

Of course! You can now track prices for flights from Northern Ireland to Washington and get an alert from Cheapflights when they change. Have a valid email address ready and click the bell icon next to the flight deals above to set up your price alerts.

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