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Cheap flights from Belfast City Airport to Washington from £554

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 5/3. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — SEA
15 Oct — 22 Oct1
1 adult
1 adult, Economy

Cheap 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 15 September 2025.

Round-trip from

£554

Popular in

November

Cheapest in

May

Average price

£554
American Airlines
  • American Airlines
  • 5/3-9/3
  • 3 total stops
  • 31h 42m total
  • Belfast to Washington
Search Deals
Highest demand for flights based on searches. 13% potential increase in price (£67 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in September 2025
Search Deals

Find flight deals from Belfast City to Washington

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 15 September 2025.

Mon 15/906:55BHD - SEA
2 stops18h 55mAer Lingus
Wed 24/919:35SEA - BHD
2 stops14h 05mAer Lingus
Deal found 13/9£849
Mon 15/906:40BHD - SEA
1 stop12h 55mBritish Airways
Wed 24/913:30SEA - BHD
1 stop16h 00mBritish Airways
Deal found 12/9£886

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 15 September 2025.
Use the filters below to find and compare flights from Belfast City Airport to Washington that are best for you.

Fly from

Belfast City

Fly to

Washington

Route

Depart

Return

Price

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

10:40-16:55

1 stop14h 15m

Seattle/Tacoma Intl

Mon 9/3

13:48-14:15

2 stops17h 27m

£554

BelfastSeattle

BHD - SEA

BHDSEA

Belfast City

Thu 5/3

11:05-16:55

1 stop13h 50m

Seattle/Tacoma Intl

Mon 9/3

19:50-18:35

1 stop15h 45m

£557

Flights are sorted by cheapest return flights first.

Deals found on 12/9

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 American Airlines and British Airways fly from Belfast City Airport to State of Washington in about 13h 50m. The time it takes to get you to your destination can typically vary by up to 25m. 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.

  • What is the cheapest month to book a flight from Belfast City Airport to State of Washington?

    Currently, January is the cheapest month in which you can book a flight from Belfast City Airport to State of Washington (average of £622). Flying from Belfast City Airport to State of Washington in July is currently the most expensive (average of £946). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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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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