Cheap flights from Northern Ireland to Washington, D.C. Dulles Intl Airport from £728
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.
Find flight deals from Northern Ireland to Dulles Intl
Cheapest flights from Northern Ireland to Dulles IntlExplore the most affordable flight options available from Northern Ireland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 October 2025.
Explore the most affordable flight options available from Northern Ireland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 20 October 2025.
Cheap flight deals from Northern Ireland to Dulles Intl
Keep the following information in mind while searching for Northern Ireland to Dulles Intl flight deals. Data was last updated 20 October 2025.
Cheapflights Fare Finder
Use the filters below to find and compare flights from Northern Ireland 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
09:05-23:59
2 stops19h 54m
Washington, D.C. Dulles Intl
Mon 24/11
14:16-14:15
2 stops18h 59m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Thu 13/11
09:05-19:55
1 stop15h 50m
Washington, D.C. Dulles Intl
Mon 17/11
14:16-18:35
2 stops23h 19m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Wed 1/4
06:30-15:35
1 stop14h 05m
Washington, D.C. Dulles Intl
Sun 5/4
19:59-21:20
2 stops20h 21m
Best time to book a flight from Northern Ireland to Dulles Intl
Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Northern Ireland with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from Northern Ireland to Washington, D.C. Dulles Intl Airport
What is the cheapest time of day to fly from NIR to IAD?
Find hourly flight availability from Northern Ireland 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 20 October 2025.
Unlike in the afternoon, when flights are generally more expensive, you can save up to 36% on flights from Northern Ireland to Washington, D.C. Dulles Intl Airport by exploring options for tickets in the evening.
Related info for your journey
Find useful and relevant information for your journey from Northern Ireland to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Travelling to a place near Washington, D.C. Dulles Intl Airport?
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Alternative routes for Northern Ireland to Dulles Intl
See prices for flight routes from nearby airports that may be better suited for you.
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Why should you use Cheapflights to find cheap flight tickets from Northern Ireland to Dulles Intl?
Millions of users choose and trust Cheapflights to book the best flight deals from Northern Ireland 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 Northern Ireland to Dulles Intl with no change fees?
Users can book flights with no change fees policies with our dedicated filters. Book flights from Northern Ireland to Dulles Intl flexibly with Cheapflights today.
Can Cheapflights notify me if prices for flights from Northern Ireland to Dulles Intl become cheaper?
Yes, Cheapflights offers price alerts on Northern Ireland to Dulles 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.