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Cheap flights from Northern Ireland to Washington from £552

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
17 Okt — 24 Okt1
1 adult
1 adult, Economy

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 17 September 2025.

Round-trip from

£552

Popular in

November

Cheapest in

May

Average price

£551
American Airlines
  • American Airlines
  • 5/3-9/3
  • 3 total stops
  • 45h 52m total
  • Northern Ireland to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£66 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 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 17 September 2025.

Mo 6/1007:05BHD - SEA
3 stops37h 54mMultiple Airlines
Mi 8/1008:40SEA - BHD
2 stops20h 00mMultiple Airlines
Deal found 15/9£785
Mo 15/906:55BHD - SEA
2 stops18h 55mAer Lingus
Mi 24/919:35SEA - BHD
2 stops14h 05mAer Lingus
Deal found 13/9£845
Mo 15/906:40BHD - SEA
1 stop12h 55mBritish Airways
Mi 24/913:30SEA - BHD
1 stop16h 00mBritish Airways
Deal found 13/9£882

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 17 September 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

Do 5/3

06:35-16:55

1 stop18h 20m

Seattle/Tacoma Intl

Mo 9/3

13:48-14:15

2 stops17h 27m

£552

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Do 5/3

17:45-16:55

1 stop31h 10m

Seattle/Tacoma Intl

Mo 9/3

19:50-18:35

1 stop15h 45m

£554

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mo 6/10

07:05-12:59

3 stops37h 54m

Seattle/Tacoma Intl

Mi 8/10

08:40-12:40

2 stops20h 00m

£785

Flights are sorted by cheapest return flights first.

Deals found on 13/9

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 17 September 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

Entertainment

6.9

Overall

7.2

Food

6.4

Crew

8.0

Comfort

7.2

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Nordia,Sept 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Entertainment

6.9

Overall

7.2

Food

6.4

Crew

8.0

Comfort

7.2

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Nordia,Sept 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.
British Airways
6.7
Okay
7,363 reviews
American Airlines
7.2
Good
10,000 reviews
Check prices

Entertainment

6.9

Overall

7.2

Food

6.4

Crew

8.0

Comfort

7.2

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Nordia,Sept 2025

KIN - MIA

We were to land in Miami sometime after 3pm but couldn’t due to bad weather, we flew around for 2 hrs until we had to land in Forth Myers to refuel, we had to sit another 2 hrs at Forth Myers until given the clearance to refuel, we were hungry, thirsty and frustrated at that point. All the had on the flight to offer was a small plastic glass of water and a pack of biscoff, I requested a cup of tea and was told none was there. We were basically at another airport and not one of the staff could consider that the passengers might be hungry or thirsty being on a plane for around 8 hrs, which you weren’t prepared for, at least find some hot water on board.

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 £552, American Airlines can have you in State of Washington from Northern Ireland in 18h 20m. The distance between Northern Ireland and State of Washington is about 4472 mi.

  • 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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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 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 17 September 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£431Average£515FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£551Average£551FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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How does Cheapflights help users find flights from Northern Ireland to Washington?

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Why should you use Cheapflights to find cheap flight tickets from Northern Ireland to Washington?

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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.

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