Cheap flights from Northern Ireland to Washington, D.C. Dulles Intl Airport from £449
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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
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 1 April 2025.
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 1 April 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 1 April 2025.
Cheapflights Fare Finder
Customise your flight search to find flights from Northern Ireland 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 1 April 2025.
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.
BFS - IAD
BFSIAD
Belfast Intl
Mon 26/5
21:55-15:20
3 stops46h 25m
Washington, D.C. Dulles Intl
Tue 3/6
17:12-16:40
2 stops18h 28m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Mon 26/5
09:50-17:30
1 stop12h 40m
Washington, D.C. Dulles Intl
Tue 3/6
22:40-15:20
1 stop11h 40m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Mon 26/5
17:25-15:35
1 stop27h 10m
Washington, D.C. Dulles Intl
Tue 3/6
17:24-21:05
2 stops22h 41m
BelfastWashington, D.C.
BFS - IAD
BFSIAD
Belfast Intl
Mon 1/9
06:40-19:59
3 stops18h 19m
BelfastWashington, D.C.
BHD - IAD
BHDIAD
Belfast City
Mon 1/9
09:05-18:55
2 stops14h 50m
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 1 April 2025.
When flying from Northern Ireland to Washington, D.C. Dulles Intl Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Rainfall in Dulles Intl by month
Plan your trip to Dulles Intl by taking into account the average rainfall totals by month.
In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 66.0 - 102.0 inches per month. May is typically the wettest month, when rainfall can reach 102.0 mm. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 66.0 mm.
Temperature in Dulles Intl by month
Plan your trip to Dulles Intl by taking into account the average temperature totals by month.
If weather is an important factor for your trip to Washington, D.C. Dulles 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 27.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 2.0 C).
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 1 April 2025.
Boarding
Entertainment
Crew
Comfort
Food
Overall
Reviews
K,Aug 2024
LHR - MIA
Boarding
Entertainment
Crew
Comfort
Food
Overall
Reviews
K,Aug 2024
LHR - MIA
Boarding
Entertainment
Crew
Comfort
Food
Overall
Reviews
K,Aug 2024
LHR - MIA
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 Northern Ireland?
Book flights to Northern Ireland if you plan to visit one of these locationsBrowse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes for Northern Ireland to Dulles Intl
See prices for flight routes from nearby airports that may be better suited for you.
Top airline flying from Northern Ireland to Dulles Intl
Discover the top airline that operate flights from Northern Ireland to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 1 April 2025.
Fly with Cheapflights
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 Northern Ireland to Dulles Intl?
Cheapflights goes through 900+ travel sites to look for the best flight deals for flights from Northern Ireland to Dulles Intl. Too many options? Cheapflights also provides filters for things like airlines, price ranges, and number of stops to help you make a decision easily.
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.