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Cheap flights from Belfast to Washington from £713

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
31 May — 7 Jun1
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 1 May 2026.

Tue 1/913:45
BHD
-
SEA
1 stop12h 40m
British Airways
Tue 22/920:20
SEA
-
BHD
1 stop13h 15m
British Airways
Deal found 30/4£713
Tue 1/907:15
BFS
-
SEA
2 stops18h 40m
Multiple Airlines
Tue 22/919:00
SEA
-
BFS
2 stops13h 20m
Multiple Airlines
Deal found 30/4£728
Tue 1/909:40
BHD
-
SEA
2 stops22h 10m
Multiple Airlines
Tue 22/913:24
SEA
-
BHD
2 stops17h 56m
Multiple Airlines
Deal found 1/5£732
Thu 5/1115:05
BHD
-
SEA
1 stop33h 50m
British Airways
Sun 8/1114:46
SEA
-
BHD
2 stops35h 54m
British Airways
Deal found 29/4£748
Thu 14/512:45
BHD
-
SEA
2 stops17h 53m
American Airlines
Tue 19/513:30
SEA
-
BHD
1 stop13h 15m
American Airlines
Deal found 26/4£769
Thu 11/621:35
BFS
-
SEA
3 stops29h 10m
Multiple Airlines
Thu 18/607:00
SEA
-
BFS
3 stops27h 55m
Multiple Airlines
Deal found 27/4£813
Thu 14/506:35
BFS
-
SEA
2 stops20h 10m
Multiple Airlines
Tue 19/521:45
SEA
-
BFS
1 stop17h 35m
Multiple Airlines
Deal found 26/4£968

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 1 May 2026.

Round-trip from

£713
British Airways
  • British Airways
  • 1/9-22/9
  • 2 total stops
  • 25h 55m 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 1 May 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
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 1/9

13:45-18:25

1 stop12h 40m

Seattle/Tacoma Intl

Tue 22/9

20:20-17:35

1 stop13h 15m

£713

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Tue 1/9

07:15-17:55

2 stops18h 40m

Seattle/Tacoma Intl

Tue 22/9

19:00-16:20

2 stops13h 20m

£728

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 1/9

09:40-23:50

2 stops22h 10m

Seattle/Tacoma Intl

Tue 22/9

13:24-15:20

2 stops17h 56m

£732

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 10/9

16:35-11:35

1 stop27h 00m

Seattle/Tacoma Intl

Mon 14/9

06:24-12:55

2 stops22h 31m

£775

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 14/5

09:50-20:43

2 stops18h 53m

Seattle/Tacoma Intl

Tue 19/5

10:35-09:20

2 stops14h 45m

£803

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 3/9

20:35-11:35

1 stop23h 00m

Seattle/Tacoma Intl

Mon 7/9

15:47-18:45

2 stops18h 58m

£808

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 11/6

21:35-18:45

3 stops29h 10m

Seattle/Tacoma Intl

Thu 18/6

07:00-18:55

3 stops27h 55m

£813

BelfastSeattle

BFS - SEA

BFSSEA

Belfast Intl

Thu 14/5

06:35-18:45

2 stops20h 10m

Seattle/Tacoma Intl

Tue 19/5

21:45-23:20

1 stop17h 35m

£968

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Fri 28/8

06:30-20:52

2 stops22h 22m

Seattle/Tacoma Intl

Thu 10/9

20:20-18:45

1 stop14h 25m

£3,788

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 30/8

06:30-22:34

2 stops24h 04m

Seattle/Tacoma Intl

Thu 10/9

20:20-20:50

2 stops16h 30m

£3,950

Flights are sorted by cheapest return flights first.

Deals found on 27/4

Showing 1-10 of 14 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 1 May 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
11,684 reviews
Check prices

Entertainment

6.9

Food

6.4

Crew

7.9

Comfort

7.2

Overall

7.1

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!
American Airlines
7.1
Good
11,684 reviews
American Airlines
7.1
Good
11,684 reviews
Check prices

Entertainment

6.9

Food

6.4

Crew

7.9

Comfort

7.2

Overall

7.1

Boarding

7.5

Reviews

1 / 20
2.0
Mediocre

Anonymous,Apr 2026

DFW - BDL

They keep changing the gate, delaying the hours and then finally canceled it. No accomodation, no food, nothing!

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 12h 40m. Fly via British Airways to get the fastest option. There are 4472 mi between Belfast and State of Washington.

  • 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

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Alternative routes for Belfast to Washington

See prices for flight routes from nearby airports that may be better suited for you.
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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 1 May 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest£555Average£555FlexibilityNo cancel feeOn-time71%
Search American Airlines flights

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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.

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