Cheap flights from Belfast to Washington, D.C. Dulles Intl Airport from £555
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 20/11. Fares are subject to change and may not be available on all flights or dates of travel.
Cheap flight deals from Belfast to Dulles Intl
Discover tips and strategies to find the most affordable flight options for your journey from Belfast (BF1) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 4 July 2025.
Round-trip from | £555 |
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Find flight deals from Belfast to Dulles Intl
Cheapest flights from Belfast to Dulles IntlExplore the most affordable flight options available from Belfast to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.
Explore the most affordable flight options available from Belfast to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 July 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Belfast to Dulles 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 4 July 2025.
Use the filters below to find and compare flights from Belfast to Washington, D.C. Dulles Intl Airport that are best for you.
Fly from
Fly to
Route
Depart
Return
Price
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Thu 20/11
15:05-15:35
1 stop29h 30m
Washington, D.C. Dulles Intl
Mon 24/11
21:55-16:15
1 stop13h 20m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Thu 20/11
06:30-15:45
1 stop14h 15m
Washington, D.C. Dulles Intl
Mon 24/11
17:35-16:50
1 stop18h 15m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Thu 20/11
17:20-23:00
2 stops34h 40m
Washington, D.C. Dulles Intl
Mon 24/11
12:30-16:50
2 stops23h 20m
BelfastWashington, D.C.
BFS - IAD
BFSIAD
Belfast Intl
Sat 16/8
05:45-21:04
3 stops20h 19m
Washington, D.C. Dulles Intl
Sat 23/8
09:45-22:30
3 stops31h 45m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Tue 15/7
06:55-15:50
2 stops13h 55m
Washington, D.C. Dulles Intl
Thu 17/7
17:20-14:30
2 stops16h 10m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Mon 14/7
17:25-15:35
1 stop27h 10m
Washington, D.C. Dulles Intl
Sat 19/7
17:25-21:15
1 stop22h 50m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Mon 14/7
17:25-16:43
2 stops28h 18m
Washington, D.C. Dulles Intl
Sat 19/7
17:25-16:55
1 stop18h 30m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Mon 14/7
09:50-17:35
1 stop12h 45m
Washington, D.C. Dulles Intl
Thu 17/7
22:40-15:30
1 stop11h 50m
Best time to book a flight from Belfast to Dulles Intl
Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Belfast with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Belfast to Washington, D.C. Dulles Intl Airport
What is the cheapest time of day to fly from BFS to IAD?
Find hourly flight availability from Belfast to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 4 July 2025.
When flying from Belfast to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight at midday, which can drop the price by up to 11% versus a flight in the morning.
Reviews of airlines servicing Dulles Intl
Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated 4 July 2025.
Check out reviews from past customers who have flown with Delta, KLM, andVirgin Atlantic from Belfast to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
Entertainment
Crew
Food
Overall
Comfort
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Crew
Food
Overall
Comfort
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Crew
Food
Overall
Comfort
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Crew
Food
Overall
Comfort
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Crew
Food
Overall
Comfort
Reviews
Kim,May 2025
PIH - SLC
Boarding
Entertainment
Crew
Food
Overall
Comfort
Reviews
Kim,May 2025
PIH - SLC
Related info for your journey
Find useful and relevant information for your journey from Belfast to Dulles 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 Belfast to Dulles Intl
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How does Cheapflights help users find flights from Belfast to Dulles Intl?
Cheapflights helps you search for flights from Belfast to Dulles Intl via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.
Why should you use Cheapflights to find cheap flight tickets from Belfast to Dulles Intl?
Millions of users choose and trust Cheapflights to book the best flight deals from Belfast to Dulles Intl for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.
Can Cheapflights find flights from Belfast to Dulles Intl with no change fees?
Cheapflights does show flights with no change fees to all users. To see these options for flights from Belfast to Dulles Intl, users can toggle the no change fees filter when performing a flight search.
Can Cheapflights notify me if prices for flights from Belfast to Dulles Intl become cheaper?
Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from Belfast today and book when prices fit your budget.