Cheap flights from Belfast to Washington, D.C. Dulles Intl Airport from £650
This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/11. Fares are subject to change and may not be available on all flights or dates of travel.
BHD — IAD
1 Dec — 8 Dec1
Return
1 adult
Economy
Return
1 adult, Economy, 0 bags
Cheap flight deals from Belfast to Dulles Intl
Enter your travel dates to find the best prices.
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Cheapest flights from Belfast to Dulles Intl
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 1 November 2026.
Thu 12/1110:40 -
3 stops38h 50m
Mon 16/1117:25 -
3 stops39h 30m
Deal found 28/10£650
Thu 12/1106:30 -
1 stop14h 10m
Mon 16/1121:45 -
1 stop13h 10m
Deal found 28/10£692
Thu 26/1120:00 -
1 stop24h 40m
Mon 30/1121:45 -
1 stop11h 30m
Deal found 28/10£700
Thu 12/1109:40 -
1 stop11h 15m
Mon 16/1112:35 -
2 stops15h 35m
Deal found 28/10£710
Thu 12/1109:40 -
1 stop11h 15m
Mon 16/1118:20 -
2 stops17h 25m
Deal found 28/10£711
Thu 26/1109:40 -
2 stops16h 46m
Mon 30/1112:35 -
2 stops15h 35m
Deal found 28/10£718
Thu 26/1115:15 -
2 stops30h 45m
Mon 30/1120:10 -
3 stops32h 00m
Deal found 28/10£729
Best flights from Belfast to Dulles Intl
Discover carefully curated flight deals from Belfast to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 1 November 2026.
Thu 12/1109:40 -
1 stop11h 15m
Mon 16/1118:20 -
2 stops17h 25m
Deal found 28/10£711
Thu 21/117:50 -
2 stops27h 30m
Mon 25/119:14 -
2 stops15h 41m
Deal found 28/10£716
Tue 9/309:40 -
1 stop11h 05m
Sun 14/311:05 -
2 stops18h 05m
Deal found 31/10£721
Last-minute flights from Belfast to Dulles Intl
Discover last-minute flight deals from Belfast to Dulles Intl. Data last updated 1 November 2026 and is based on user searches.
Thu 12/1110:40 -
3 stops38h 50m
Mon 16/1117:25 -
3 stops39h 30m
Deal found 28/10£650
Thu 12/1106:30 -
1 stop14h 10m
Mon 16/1121:45 -
1 stop13h 10m
Deal found 28/10£692
Thu 12/1109:40 -
1 stop11h 15m
Mon 16/1112:35 -
2 stops15h 35m
Deal found 28/10£710
Thu 12/1109:40 -
1 stop11h 15m
Mon 16/1118:20 -
2 stops17h 25m
Deal found 28/10£711
Thu 26/1120:00 -
1 stop24h 40m
Mon 30/1121:45 -
1 stop11h 30m
Deal found 28/10£700
Thu 26/1109:40 -
2 stops16h 46m
Mon 30/1112:35 -
2 stops15h 35m
Deal found 28/10£718
Thu 26/1115:15 -
2 stops30h 45m
Mon 30/1120:10 -
3 stops32h 00m
Deal found 28/10£729
Find 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 1 November 2026.
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 7,457,451 searches. Data last updated 1 November 2026.
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
Cheapest return flight
Fastest return journey
BelfastWashington, D.C.
BHD Belfast City - IAD Washington, D.C. Dulles Intl
BHDIAD
Belfast City
Thu 12/11
09:40-15:55
1 stop11h 15m
Washington, D.C. Dulles Intl
Mon 16/11
18:20-16:45
2 stops17h 25m
£711
BelfastWashington, D.C.
BHD Belfast City - IAD Washington, D.C. Dulles Intl
BHDIAD
Belfast City
Thu 21/1
17:50-16:20
2 stops27h 30m
Washington, D.C. Dulles Intl
Mon 25/1
19:14-15:55
2 stops15h 41m
£716
BelfastWashington, D.C.
BHD Belfast City - IAD Washington, D.C. Dulles Intl
BHDIAD
Belfast City
Tue 9/3
09:40-15:45
1 stop11h 05m
Washington, D.C. Dulles Intl
Sun 14/3
11:05-09:10
2 stops18h 05m
£721
Flights are sorted by cheapest return flights first.
Deals found on 28/10
Sorted by cheapest first
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.
BF1-IAD
BHD-IAD
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 to Washington, D.C. Dulles Intl Airport
BF1-IAD
BHD-IAD
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 to Dulles Intl. 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 to Washington, D.C. Dulles Intl Airport?
Airlines like Delta and British Airways fly from Belfast to Washington, D.C. Dulles Intl Airport in about 11h 15m. The time it takes to get you to your destination can typically vary by up to 16h 15m. Airlines will cover a distance of 3390 mi. This flight may include one or multiple stops.
Can I find deals for flights from Belfast to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Belfast to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Belfast to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belfast to Dulles Intl.
Can I find deals for business class flights from Belfast to Dulles Intl?
Yes. Cheapflights offers flight deals from Belfast to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
Explore flights to Dulles Intl departing from other origins. Flights are based on user searches made on Cheapflights and were last updated on 1 November 2026.
Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.
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.
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