Find flights
When to book
Airlines
FAQs

Cheap flights from Belfast to Washington from £461

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 11/7. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
10 Jul — 17 Jul1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Belfast to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Belfast to Washington
Explore the most affordable flight options available from Belfast to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 10 June 2026.

Wed 16/920:35
BHD
-
SEA
1 stop23h 00m
British Airways
Wed 7/1011:34
SEA
-
BHD
2 stops16h 26m
British Airways
Deal found 7/6£573
Tue 1/906:30
BHD
-
SEA
1 stop13h 05m
British Airways
Tue 22/920:20
SEA
-
BHD
1 stop14h 35m
British Airways
Deal found 6/6£576
Tue 15/909:40
BHD
-
SEA
2 stops19h 56m
British Airways
Tue 6/1020:20
SEA
-
BHD
1 stop13h 15m
British Airways
Deal found 9/6£578
Mon 7/915:20
BHD
-
SEA
1 stop28h 15m
British Airways
Mon 28/917:40
SEA
-
BHD
2 stops17h 05m
British Airways
Deal found 9/6£593
Tue 15/917:30
BHD
-
SEA
1 stop31h 05m
KLM
Tue 6/1017:45
SEA
-
BHD
1 stop15h 10m
KLM
Deal found 10/6£597
Mon 7/919:35
BHD
-
SEA
1 stop24h 00m
Multiple Airlines
Mon 28/913:30
SEA
-
BHD
1 stop15h 25m
Multiple Airlines
Deal found 9/6£603
Thu 1/1020:35
BHD
-
SEA
1 stop23h 00m
British Airways
Mon 5/1013:30
SEA
-
BHD
1 stop15h 25m
British Airways
Deal found 9/6£605
Thu 23/708:20
BFS
-
SEA
3 stops42h 25m
Multiple Airlines
Thu 30/715:40
SEA
-
BFS
2 stops19h 50m
Multiple Airlines
Deal found 8/6£619
Mon 7/910:05
BFS
-
SEA
1 stop14h 30m
Multiple Airlines
Mon 28/919:00
SEA
-
BFS
2 stops13h 15m
Multiple Airlines
Deal found 8/6£1,830

Find flight deals from Belfast to Washington

Keep the following information in mind while searching for Belfast to Washington flight deals. Data was last updated 10 June 2026.

Round-trip from

£573

One-way from

£461
British Airways
  • British Airways
  • 16/9-7/10
  • 3 total stops
  • 39h 26m total
  • Belfast to Washington
Search Deals
11/7
  • 11/7
  • 3 total stops
  • 55h 20m total
  • Belfast to Washington
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast 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 10 June 2026.
Use the filters below to find and compare flights from Belfast to Washington that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 16/9

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Wed 7/10

13:30-13:35

1 stop16h 05m

£573

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 15/9

09:50-11:47

1 stop33h 57m

Seattle/Tacoma Intl

Tue 6/10

17:45-16:55

1 stop15h 10m

£579

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 15/9

09:40-21:36

2 stops19h 56m

Seattle/Tacoma Intl

Tue 6/10

20:20-17:35

1 stop13h 15m

£579

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

15:20-11:35

1 stop28h 15m

Seattle/Tacoma Intl

Mon 28/9

17:40-18:45

2 stops17h 05m

£593

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 7/9

19:35-11:35

1 stop24h 00m

Seattle/Tacoma Intl

Mon 28/9

13:30-12:55

1 stop15h 25m

£603

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 23/7

08:20-18:45

3 stops42h 25m

Seattle/Tacoma Intl

Thu 30/7

19:00-23:00

3 stops20h 00m

£678
Fastest return journey

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 7/9

10:05-16:35

1 stop14h 30m

Seattle/Tacoma Intl

Mon 28/9

19:00-16:15

2 stops13h 15m

£1,830
Cheapest one-way

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Sat 11/7

21:40-21:00

3 stops55h 20m

£461

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

19:35-17:10

2 stops29h 35m

£503
Fastest single journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

06:30-11:35

1 stop13h 05m

£578

Flights are sorted by cheapest return flights first.

Deals found on 7/6

Showing 1-10 of 11 resultsSorted by cheapest first
1
2

Best time to book a flight from Belfast to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast 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 Belfast 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 10 June 2026.
Check out reviews from past customers who have flown with American Airlines from Belfast to Washington to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.1
Good
11,636 reviews
Check prices

Overall

7.1

Comfort

7.2

Crew

7.9

Food

6.4

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Beatriz,May 2026

HEL - DFW

Very modern and confortable plane. Dinner was delicious. Whole crew were polite and perfect.
American Airlines
7.1
Good
11,636 reviews
American Airlines
7.1
Good
11,636 reviews
Check prices

Overall

7.1

Comfort

7.2

Crew

7.9

Food

6.4

Boarding

7.5

Entertainment

6.9

Reviews

1 / 20
10.0
Excellent

Beatriz,May 2026

HEL - DFW

Very modern and confortable plane. Dinner was delicious. Whole crew were polite and perfect.

Related info for your journey

Find useful and relevant information for your journey from Belfast 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 Belfast to State of Washington?

    There are many flights that can get you from Belfast to State of Washington in 23h. Fly via British Airways or KLM to get the fastest option. There are 4472 mi between Belfast and State of Washington. Both multi-stop and direct flights can be found to your destination and back.

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

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

  • How can I find direct flights from Belfast to Washington?

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

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

    Yes. Cheapflights offers flight deals from Belfast 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Top airline flying from Belfast to Washington

Discover the top airline that operate flights from Belfast 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 10 June 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£561Average£561FlexibilityNo 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 Belfast to Washington?

When you search for this flight from Belfast to Washington, Cheapflights searches on 900+ travel sites to save you time finding great flight deals online. Additionally, we offer filter features so you can choose a preferred cabin class or airline, see different price ranges, and much more so you can book the flight for you.

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

Millions of users choose and trust Cheapflights to book the best flight deals from Belfast 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 Belfast to Washington with no change fees?

Yes, we can. To see specific flights from Belfast 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 Belfast to Washington become cheaper?

Yes! Start tracking prices for Belfast to Washington flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.