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Cheap flights from Northern Ireland to Washington from £558

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 15/9. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
31 Aug — 7 Sep1
1 adult

Cheap 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 August 2025.

Round-trip from

£558

Popular in

November

Cheapest in

May

Average price

£768
British Airways
  • British Airways
  • 15/9-24/9
  • 2 total stops
  • 28h 55m total
  • Northern Ireland to Washington
Search Deals
Highest demand for flights based on searches. 15% potential increase in price (£83 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£15 potential savings vs. average return price).
Search Deals
Average for round-trip flights in August 2025
Search Deals

Find flight deals from Northern Ireland to Washington

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 August 2025.

Mon 15/906:40BHD - SEA
1 stop12h 55mBritish Airways
Wed 24/913:30SEA - BHD
1 stop16h 00mBritish Airways
Deal found 23/8£558
Mon 15/913:50BHD - SEA
2 stops38h 19mFinnair
Wed 24/923:05SEA - BHD
2 stops28h 05mFinnair
Deal found 25/8£655
Mon 15/917:55BHD - SEA
2 stops31h 55mAer Lingus
Wed 24/919:35SEA - BHD
2 stops34h 55mAer Lingus
Deal found 23/8£661
Mon 15/906:40BHD - SEA
1 stop12h 55mMultiple Airlines
Wed 24/907:48SEA - BHD
2 stops20h 07mMultiple Airlines
Deal found 24/8£729
Tue 14/1006:35BHD - SEA
1 stop12h 35mBritish Airways
Wed 22/1013:30SEA - BHD
1 stop16h 00mBritish Airways
Deal found 24/8£2,862
Tue 14/1020:20BHD - SEA
2 stops33h 25mMultiple Airlines
Wed 22/1007:30SEA - BHD
2 stops21h 10mMultiple Airlines
Deal found 24/8£2,864

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 August 2025.
Use the filters below to find and compare flights from Northern Ireland to Washington that are best for you.

Fly from

Northern Ireland

Fly to

Washington

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

13:30-13:30

1 stop16h 00m

£558

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

13:50-20:09

2 stops38h 19m

Seattle/Tacoma Intl

Wed 24/9

23:05-11:10

2 stops28h 05m

£655

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

17:55-17:50

2 stops31h 55m

Seattle/Tacoma Intl

Wed 24/9

19:35-14:30

2 stops34h 55m

£661

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 15/9

06:40-11:35

1 stop12h 55m

Seattle/Tacoma Intl

Wed 24/9

07:48-11:55

2 stops20h 07m

£729

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 14/10

06:35-11:10

1 stop12h 35m

Seattle/Tacoma Intl

Wed 22/10

13:30-13:30

1 stop16h 00m

£2,862

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 14/10

20:20-21:45

2 stops33h 25m

Seattle/Tacoma Intl

Wed 22/10

07:30-12:40

2 stops21h 10m

£2,864

Flights are sorted by cheapest return flights first.

Deals found on 23/8

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 August 2025.
Read through reviews of airlines operating flights from Northern Ireland to Washington, such as American Airlines and British Airways. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews
Check prices

Overall

7.2

Entertainment

6.9

Food

6.5

Crew

8.0

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Overall

7.2

Entertainment

6.9

Food

6.5

Crew

8.0

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.
British Airways
6.7
Okay
7,309 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Overall

7.2

Entertainment

6.9

Food

6.5

Crew

8.0

Boarding

7.5

Comfort

7.2

Reviews

1 / 20
2.0
Mediocre

Anonymous,Aug 2025

BNA - ORD

My flight was 8 hours delayed, so I missed my connecting flight to Dublin. I understand it’s not the staff’s fault but the lack of sympathy and apology was appalling. I had been sat in the airport since 4am until 3pm and they did not seem understanding. Not good. Need better customer service.

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 £558, British Airways can have you in State of Washington from Northern Ireland in 12h 55m. 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.

  • What is the cheapest month to book a flight from Northern Ireland to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Northern Ireland to State of Washington (average of £622). Flying from Northern Ireland to State of Washington in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Top 2 airlines flying from Northern Ireland to Washington

Discover the top 2 airlines 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 August 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£436Average£534FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£557Average£557FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

Fly with Cheapflights

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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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