Find flights
When to book
Airlines
FAQs

Cheap flights from Belfast to Washington from £390

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 7/9. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
21 Jul — 28 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 21 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 18/6£554
Wed 23/920:35
BHD
-
SEA
1 stop23h 00m
British Airways
Wed 14/1013:30
SEA
-
BHD
1 stop14h 30m
British Airways
Deal found 17/6£555
Wed 23/917:30
BHD
-
SEA
1 stop26h 17m
KLM
Wed 14/1009:30
SEA
-
BHD
2 stops15h 50m
KLM
Deal found 17/6£591
Thu 17/906:30
BHD
-
SEA
1 stop13h 05m
British Airways
Mon 21/917:40
SEA
-
BHD
2 stops17h 45m
British Airways
Deal found 19/6£595
Wed 23/909:50
BHD
-
SEA
2 stops17h 05m
Delta
Wed 14/1007:30
SEA
-
BHD
2 stops17h 50m
Delta
Deal found 20/6£597
Wed 23/909:50
BHD
-
SEA
2 stops20h 12m
Multiple Airlines
Wed 14/1009:30
SEA
-
BHD
2 stops15h 50m
Multiple Airlines
Deal found 17/6£599
Wed 16/920:15
BFS
-
SEA
3 stops32h 25m
Multiple Airlines
Wed 7/1015:40
SEA
-
BFS
3 stops20h 35m
Multiple Airlines
Deal found 18/6£721
Thu 2/708:20
BFS
-
SEA
2 stops34h 55m
Multiple Airlines
Thu 9/713:30
SEA
-
BFS
2 stops23h 05m
Multiple Airlines
Deal found 19/6£843
Wed 23/909:35
BFS
-
SEA
2 stops32h 50m
Multiple Airlines
Wed 14/1017:45
SEA
-
BFS
1 stop20h 40m
Multiple Airlines
Deal found 17/6£895

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 21 June 2026.

Round-trip from

£554

One-way from

£390
British Airways
  • British Airways
  • 16/9-7/10
  • 3 total stops
  • 39h 26m total
  • Belfast to Washington
Search Deals
7/9
  • 7/9
  • 3 total stops
  • 54h 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 21 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 23/9

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Wed 14/10

13:30-12:00

1 stop14h 30m

£555

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 16/9

10:05-21:36

2 stops19h 31m

Seattle/Tacoma Intl

Wed 7/10

11:34-12:00

2 stops16h 26m

£585

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 23/9

17:30-11:47

1 stop26h 17m

Seattle/Tacoma Intl

Wed 14/10

09:30-09:20

2 stops15h 50m

£591
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 17/9

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Mon 21/9

17:40-19:25

2 stops17h 45m

£595

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Wed 23/9

09:50-18:55

2 stops17h 05m

Seattle/Tacoma Intl

Wed 14/10

07:30-09:20

2 stops17h 50m

£597

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 1/10

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Mon 5/10

13:30-12:55

1 stop15h 25m

£606

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 16/9

09:35-09:40

2 stops32h 05m

Seattle/Tacoma Intl

Wed 7/10

15:40-20:15

3 stops20h 35m

£768

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 2/7

08:20-11:15

2 stops34h 55m

Seattle/Tacoma Intl

Thu 9/7

13:30-20:35

2 stops23h 05m

£843

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Wed 23/9

09:35-10:25

2 stops32h 50m

Seattle/Tacoma Intl

Wed 14/10

17:45-22:25

1 stop20h 40m

£895
Cheapest one-way

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Mon 7/9

18:50-17:10

3 stops54h 20m

£390

Flights are sorted by cheapest return flights first.

Deals found on 18/6

Showing 1-10 of 13 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 21 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
11,726 reviews
Check prices

Entertainment

6.8

Boarding

7.5

Food

6.4

Comfort

7.2

Overall

7.1

Crew

7.9

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
11,726 reviews
American Airlines
7.1
Good
11,726 reviews
Check prices

Entertainment

6.8

Boarding

7.5

Food

6.4

Comfort

7.2

Overall

7.1

Crew

7.9

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.

Alternative routes for Belfast to Washington

See prices for flight routes from nearby airports that may be better suited for you.
Belfast Intl to John F Kennedy Intl flights
Belfast Intl to Newark flights
Belfast City to John F Kennedy Intl flights
Belfast City to LaGuardia flights
Belfast Intl to Seattle flights
Belfast City to Newark flights
Belfast Intl to O'Hare Intl flights
Belfast City to Seattle flights
Belfast Intl to Hobby flights
Belfast Intl to Orlando flights
Belfast Intl to Boston flights
Belfast City to Boston flights
Belfast Intl to San Francisco flights
Belfast City to George Bush Intcntl flights
Belfast City to Orlando flights
Belfast Intl to Dallas/Fort Worth flights
Belfast City to Denver flights
Belfast Intl to Denver flights
Belfast City to San Francisco flights
Belfast City to Dallas/Fort Worth flights
Belfast Intl to Miami flights
Belfast Intl to Minneapolis flights
Belfast City to O'Hare Intl flights
Belfast Intl to Atlanta flights
Belfast Intl to Los Angeles flights
Belfast Intl to Las Vegas flights
Belfast Intl to Ontario flights
Belfast City to Minneapolis flights
Belfast City to Miami flights
Belfast City to Los Angeles flights
Belfast City to Las Vegas flights
Belfast Intl to Dulles Intl flights
Belfast City to Atlanta flights
Belfast Intl to Fort Lauderdale flights
Belfast Intl to Baltimore flights
Belfast Intl to Charlotte flights
Belfast City to Fort Lauderdale flights
Belfast City to Baltimore flights
Belfast Intl to Jacksonville flights
Belfast City to San Antonio flights
Belfast City to Santa Ana flights
Belfast City to Jacksonville flights
Belfast City to Omaha flights
Belfast Intl to Detroit flights
Belfast City to Charlotte flights
Belfast City to Pittsburgh flights
Belfast Intl to West Palm Beach flights

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 21 June 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£567Average£567FlexibilityNo 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.