Cheap flights from Washington to Belfast Intl Airport from £340
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 16/8. 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 8 March 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 8 March 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 8 March 2025.
Find flights from Washington to Belfast Intl within your budget
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 8 March 2025.
Fly from
Fly to
Route
Depart
Return
Price
SeattleBelfast
SEA - BFS
SEABFS
Seattle/Tacoma Intl
Tue 15/4
18:45-21:20
2 stops18h 35m
Belfast Intl
Tue 22/4
09:00-16:59
2 stops15h 59m
PortlandBelfast
PDX - BFS
PDXBFS
Portland
Sat 5/4
06:00-15:40
3 stops25h 40m
Belfast Intl
Fri 11/4
06:05-14:45
3 stops40h 40m
PortlandBelfast
PDX - BFS
PDXBFS
Portland
Sat 16/8
06:35-08:40
3 stops42h 05m
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.
Travel insights for flights from Washington to Belfast Intl
Get recent, data-driven insights about flights from Washington to Belfast Intl including ideal travel times, pricing trends, and more.
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
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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.
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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.