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$723+ Cheap flights from Northern Ireland to Washington

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/13. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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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 September 17, 2025.

Round-trip from

$723
(Trip.com)

Popular in

November

Cheapest in

May

Average price

$751
From Northern Ireland to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($124 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($30 potential savings vs. average RT 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 September 17, 2025.

This Booking.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/67:05 amBHD - SEA
3 stops37h 54mMultiple Airlines
Wed 10/88:40 amSEA - BHD
2 stops20h 00mMultiple Airlines
Deal found 9/15$1,071
This British Airways deal was found by Cheapflights users on 9/14. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/156:40 amBHD - SEA
1 stop19h 40mBritish Airways
Wed 9/241:30 pmSEA - BHD
1 stop16h 00mBritish Airways
Deal found 9/14$1,225

Cheapflights Fare Finder

 
Customize 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 2,558,603 searches. Data last updated September 17, 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

Fri 2/13

6:45 am-5:00 pm

2 stops18h 15m

Seattle/Tacoma Intl

Tue 2/17

2:35 pm-4:45 pm

2 stops18h 10m

$723

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 2/13

11:30 am-4:55 pm

1 stop13h 25m

Seattle/Tacoma Intl

Tue 2/17

6:50 pm-6:40 pm

1 stop15h 50m

$741

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 3/5

3:05 pm-11:30 am

1 stop28h 25m

Seattle/Tacoma Intl

Mon 3/9

1:48 pm-2:15 pm

2 stops17h 27m

$753

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/17

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 round-trip 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.

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?

    There are many flights that can get you from Northern Ireland to State of Washington in 13h 25m. Fly via British Airways or American Airlines to get the fastest option. The distance between Northern Ireland and State of Washington is about 4472 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 vacation 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 $238). Flying from Northern Ireland to State of Washington in June is currently the most expensive (average of $387). 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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