Cheap flights from Belfast Intl Airport to Washington from £432
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 23/8. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Belfast Intl to Washington
Keep the following information in mind while searching for Belfast Intl to Washington flight deals. Data was last updated 12 July 2025.
Find flight deals from Belfast Intl to Washington
Cheapest flights from Belfast Intl to WashingtonExplore the most affordable flight options available from Belfast Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 July 2025.
Explore the most affordable flight options available from Belfast Intl to Washington. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 12 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Belfast Intl 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 12 July 2025.
Use the filters below to find and compare flights from Belfast Intl Airport to Washington that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
BelfastSeattle
BFS - SEA
BFSSEA
Belfast Intl
Sun 24/8
22:40-20:28
3 stops29h 48m
Seattle/Tacoma Intl
Sun 31/8
15:45-23:20
3 stops23h 35m
BelfastSeattle
BFS - SEA
BFSSEA
Belfast Intl
Sat 23/8
05:45-18:38
3 stops44h 53m
Best time to book a flight from Belfast Intl to Washington
Have a flexible travel schedule? Discover the best time to fly to Washington from Belfast Intl with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Belfast Intl Airport to Washington
Related info for your journey
Find useful and relevant information for your journey from Belfast Intl to Washington. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Belfast Intl to Washington
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Belfast Intl to Washington
Discover the top airline that operate flights from Belfast Intl 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 12 July 2025.
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How does Cheapflights help users find flights from Belfast Intl to Washington?
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Why should you use Cheapflights to find cheap flight tickets from Belfast Intl to Washington?
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Can Cheapflights find flights from Belfast Intl to Washington with no change fees?
Need flexible booking options for your flight to Washington from Belfast Intl? 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 Intl to Washington become cheaper?
Yes, Cheapflights offers price alerts on Belfast Intl 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.