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Cheap flights from Belfast City Airport to Washington from £503

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 3/8. 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 City to Washington

Enter your travel dates to find the best prices.

Cheapest flights from Belfast City to Washington
Explore the most affordable flight options available from Belfast City 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£594
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£606

Find flight deals from Belfast City to Washington

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

Round-trip from

£573

One-way from

£503
British Airways
  • British Airways
  • 16/9-7/10
  • 3 total stops
  • 39h 26m total
  • Belfast to Washington
Search Deals
Aer Lingus
  • Aer Lingus
  • 3/8
  • 2 total stops
  • 29h 35m total
  • Belfast to Washington
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Belfast City 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 City Airport 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
Fastest return journey

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

£594

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
Cheapest one-way

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

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

19:35-18:45

1 stop31h 10m

£808

Flights are sorted by cheapest return flights first.

Deals found on 9/6

Sorted by cheapest first

Best time to book a flight from Belfast City to Washington

Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast City 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 City Airport 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 Belfast City 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 City Airport to State of Washington?

    Airlines like British Airways and KLM fly from Belfast City Airport to State of Washington in about 23h. The time it takes to get you to your destination can typically vary by up to 10h 57m. There are 4472 mi between Belfast City Airport and State of Washington. When browsing for deals, the options you’ll see will be for both direct flights and flights with stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belfast City 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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Why should you use Cheapflights to find cheap flight tickets from Belfast City to Washington?

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Can Cheapflights find flights from Belfast City to Washington with no change fees?

Need flexible booking options for your flight to Washington from Belfast City? Don’t worry, Cheapflights have you covered. Use our search filter to only show flights with no change fees.

Can Cheapflights notify me if prices for flights from Belfast City to Washington become cheaper?

Yes, Cheapflights offers price alerts on Belfast City to Washington flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

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