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Cheap flights from Northern Ireland to Washington from £445

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 23/7. Fares are subject to change and may not be available on all flights or dates of travel.
BFS — SEA
25 Feb — 4 Mar1
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 January 2026.

Tue 10/308:35
BFS
-
SEA
2 stops16h 25m
Multiple Airlines
Tue 17/315:35
SEA
-
BFS
2 stops23h 15m
Multiple Airlines
Deal found 24/1£469
Sat 7/306:35
BHD
-
SEA
1 stop12h 55m
British Airways
Mon 9/319:50
SEA
-
BHD
1 stop15h 45m
British Airways
Deal found 23/1£530
Wed 4/206:35
BHD
-
SEA
2 stops23h 32m
British Airways
Sun 8/214:10
SEA
-
BHD
2 stops36h 30m
British Airways
Deal found 25/1£542
Thu 6/812:45
BHD
-
SEA
1 stop13h 40m
American Airlines
Fri 14/820:20
SEA
-
BHD
1 stop16h 15m
American Airlines
Deal found 25/1£911
Thu 6/806:30
BHD
-
SEA
2 stops18h 40m
British Airways
Fri 14/810:40
SEA
-
BHD
2 stops23h 30m
British Airways
Deal found 25/1£919
Thu 12/306:30
BFS
-
SEA
2 stops18h 30m
Multiple Airlines
Thu 19/308:10
SEA
-
BFS
3 stops23h 25m
Multiple Airlines
Deal found 25/1£946

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 January 2026.

Round-trip from

£469

One-way from

£445
10/3-17/3
  • 10/3-17/3
  • 4 total stops
  • 39h 40m total
  • Northern Ireland to Washington
Search Deals
23/7
  • 23/7
  • 2 total stops
  • 29h 15m 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 January 2026.
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

BFS - SEA

BFSSEA

Belfast Intl

Tue 10/3

08:35-18:00

2 stops16h 25m

Seattle/Tacoma Intl

Tue 17/3

15:35-21:50

2 stops23h 15m

£469

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sat 7/3

06:35-11:30

1 stop12h 55m

Seattle/Tacoma Intl

Mon 9/3

13:37-18:35

2 stops21h 58m

£530

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 12/3

06:30-18:00

2 stops18h 30m

Seattle/Tacoma Intl

Thu 19/3

08:10-14:35

3 stops23h 25m

£946

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 23/7

20:40-17:55

2 stops29h 15m

£445

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 23/7

11:45-17:55

2 stops38h 10m

£461

Flights are sorted by cheapest return flights first.

Deals found on 26/1

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 January 2026.
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
11,189 reviews
Check prices

Crew

8.0

Entertainment

6.9

Food

6.4

Overall

7.2

Comfort

7.2

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
American Airlines
7.2
Good
11,189 reviews
American Airlines
7.2
Good
11,189 reviews
Check prices

Crew

8.0

Entertainment

6.9

Food

6.4

Overall

7.2

Comfort

7.2

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.
British Airways
6.7
Okay
7,701 reviews
American Airlines
7.2
Good
11,189 reviews
Check prices

Crew

8.0

Entertainment

6.9

Food

6.4

Overall

7.2

Comfort

7.2

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Susie,Jan 2026

CLT - TPA

This flight was delayed 3 or 4 times. We had boarded the plane, sat on plane for a good 30 minutes, then we had to board the aircraft, walk to a different gate, wait and then board another aircraft. We arrived in Tampa 4 hours later than the original booking. I feel there should have been some sort of compensation especially for the advantage members.

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 £530, 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.

  • 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

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Alternative routes for Northern Ireland to Washington

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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 January 2026.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest£429Average£698FlexibilityNo cancel feeOn-time70%
Search British Airways flights
American AirlinesCheapest£550Average£550FlexibilityNo 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?

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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.

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