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Cheap flights from Belfast City Airport to Washington from £398

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 9/6. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
13 May — 20 May1
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 13 April 2026.

Wed 14/1006:30
BHD
-
SEA
1 stop13h 05m
British Airways
Sun 18/1020:20
SEA
-
BHD
1 stop14h 25m
British Airways
Deal found 8/4£690
Thu 12/1109:05
BHD
-
SEA
1 stop15h 50m
British Airways
Mon 16/1111:42
SEA
-
BHD
2 stops18h 33m
British Airways
Deal found 8/4£700
Mon 14/908:45
BHD
-
SEA
2 stops19h 55m
Multiple Airlines
Sun 20/919:00
SEA
-
BHD
2 stops17h 30m
Multiple Airlines
Deal found 13/4£705
Mon 14/919:35
BHD
-
SEA
2 stops29h 54m
British Airways
Sun 20/920:20
SEA
-
BHD
1 stop14h 25m
British Airways
Deal found 13/4£734

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 13 April 2026.

Round-trip from

£3,911

One-way from

£398
British Airways
  • British Airways
  • 31/8-10/9
  • 3 total stops
  • 31h 11m total
  • Belfast to Washington
Search Deals
9/6
  • 9/6
  • 3 total stops
  • 35h 58m 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 13 April 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

Mon 14/9

08:45-20:40

2 stops19h 55m

Seattle/Tacoma Intl

Sun 20/9

19:00-20:30

2 stops17h 30m

£705
Fastest return journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 31/8

06:30-11:35

1 stop13h 05m

Seattle/Tacoma Intl

Thu 10/9

13:24-15:30

2 stops18h 06m

£3,911
Cheapest one-way

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/6

10:20-14:18

3 stops35h 58m

£398
Fastest single journey

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Tue 9/6

06:30-11:35

1 stop13h 05m

£546

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Mon 3/8

06:30-11:35

1 stop13h 05m

£815

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Sun 7/6

07:00-11:45

3 stops36h 45m

£1,194

Flights are sorted by cheapest return flights first.

Deals found on 10/4

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 fly from Belfast City Airport to State of Washington in about 13h 05m. The time it takes to get you to your destination can typically vary by up to . There are 4472 mi between Belfast City Airport and State of Washington.

  • 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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How does Cheapflights help users find flights from Belfast City to Washington?

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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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