Cheap flights from Washington to Belfast Intl Airport from £235
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 4/7. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Washington to Belfast Intl
Keep the following information in mind while searching for Washington to Belfast Intl flight deals. Data was last updated 1 May 2025.
Find flight deals from Washington to Belfast Intl
Cheapest flights from Washington to Belfast IntlExplore the most affordable flight options available from Washington to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 May 2025.
Explore the most affordable flight options available from Washington to Belfast Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 1 May 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Washington to Belfast Intl 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 2025.
Use the filters below to find and compare flights from Washington to Belfast Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
SeattleBelfast
SEA - BFS
SEABFS
Seattle/Tacoma Intl
Tue 10/6
15:45-15:00
2 stops15h 15m
Belfast Intl
Tue 17/6
09:00-17:50
2 stops16h 50m
PortlandBelfast
PDX - BFS
PDXBFS
Portland
Fri 13/6
15:25-20:05
3 stops20h 40m
Belfast Intl
Fri 20/6
16:40-22:56
3 stops38h 16m
SeattleBelfast
SEA - BFS
SEABFS
Seattle/Tacoma Intl
Fri 4/7
15:45-18:35
3 stops42h 50m
Best time to book a flight from Washington to Belfast Intl
Have a flexible travel schedule? Discover the best time to fly to Belfast Intl from Washington with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Washington to Belfast Intl Airport
Rainfall in Belfast Intl by month
Plan your trip to Belfast Intl by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Belfast Intl Airport ranges from 50.0 - 90.0 inches per month. October is typically the wettest month, when rainfall can reach 90.0 mm. April is typically the driest time to visit Belfast Intl Airport when rainfall is around 50.0 mm.
Temperature in Belfast Intl by month
Plan your trip to Belfast Intl by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Belfast Intl Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 16.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 5.0 C).
Related info for your journey
Find useful and relevant information for your journey from Washington to Belfast Intl. 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 Washington to Belfast Intl
See prices for flight routes from nearby airports that may be better suited for you.
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Deals for Washington to Belfast Intl flights are sourced from 900+ travel sites when you use Cheapflights. When all flight results come back, Cheapflights lets you sort and filter flights using different criteria to choose better, like price, airport, cabin class, and plenty of other options.
Why should you use Cheapflights to find cheap flight tickets from Washington to Belfast Intl?
Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Washington to Belfast Intl for you. Better yet — we are completely free to use.
Can Cheapflights find flights from Washington to Belfast Intl with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Washington to Belfast Intl flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Washington to Belfast Intl become cheaper?
Yes, Cheapflights offers price alerts on Washington to Belfast Intl 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.