£622+ Flights from Northern Ireland to Washington, D.C. Dulles Intl Airport | Cheapflights

Cheap flight deals from Northern Ireland to Dulles Intl

Round-trip from	£622

3/7-9/7

3/7-9/7
4 total stops
55h 47m total
Northern Ireland to Washington, D.C.

Find flight deals from Northern Ireland to Dulles Intl

Cheapest flights from Northern Ireland to Dulles Intl
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 13 June 2025.

Thu 3/706:00BFS - IAD

2 stops32h 37mMultiple Airlines

Wed 9/714:25IAD - BFS

2 stops23h 10mMultiple Airlines

Deal found 11/6£622

Mon 3/1117:20BHD - IAD

1 stop27h 25mDelta

Tue 30/1217:35IAD - BHD

1 stop18h 15mDelta

Deal found 12/6£1,875

Tue 4/1108:40BHD - IAD

2 stops15h 50mAmerican Airlines

Tue 30/1221:55IAD - BHD

1 stop13h 50mAmerican Airlines

Deal found 12/6£1,896

Mon 3/1119:30BHD - IAD

2 stops25h 05mBritish Airways

Sat 27/1218:15IAD - BHD

1 stop11h 55mBritish Airways

Deal found 12/6£1,927

Tue 4/1106:30BHD - IAD

2 stops15h 05mMultiple Airlines

Sat 27/1217:35IAD - BHD

1 stop18h 15mMultiple Airlines

Deal found 12/6£1,932

Tue 4/1106:55BHD - IAD

2 stops13h 40mAer Lingus

Fri 26/1217:05IAD - BHD

2 stops14h 45mAer Lingus

Deal found 12/6£1,935

Tue 4/1106:30BHD - IAD

2 stops15h 05mKLM

Fri 26/1217:35IAD - BHD

1 stop18h 15mKLM

Deal found 12/6£2,352

Best flights from Northern Ireland to Dulles Intl
Discover carefully curated flight deals from Northern Ireland to Dulles Intl that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 13 June 2025.

Thu 3/706:00BFS - IAD

2 stops32h 37mMultiple Airlines

Wed 9/714:25IAD - BFS

2 stops23h 10mMultiple Airlines

Deal found 11/6£622

Mon 3/1117:20BHD - IAD

1 stop27h 25mDelta

Tue 30/1217:35IAD - BHD

1 stop18h 15mDelta

Deal found 12/6£1,875

Tue 4/1108:40BHD - IAD

2 stops15h 50mAmerican Airlines

Tue 30/1221:55IAD - BHD

1 stop13h 50mAmerican Airlines

Deal found 12/6£1,896

Mon 3/1119:30BHD - IAD

2 stops25h 05mBritish Airways

Sat 27/1218:15IAD - BHD

1 stop11h 55mBritish Airways

Deal found 12/6£1,927

Tue 4/1106:55BHD - IAD

2 stops13h 40mAer Lingus

Fri 26/1217:05IAD - BHD

2 stops14h 45mAer Lingus

Deal found 12/6£1,935

Tue 4/1106:30BHD - IAD

2 stops15h 05mKLM

Fri 26/1217:35IAD - BHD

1 stop18h 15mKLM

Deal found 12/6£2,352

Tue 4/1106:30BHD - IAD

2 stops15h 05mMultiple Airlines

Sat 27/1217:35IAD - BHD

1 stop18h 15mMultiple Airlines

Deal found 12/6£1,932

One-way flights from Northern Ireland to Dulles Intl
Search for one-way flight options from Northern Ireland to Dulles Intl. Find affordable one-way fares based on user searches. Data last updated 13 June 2025.

Mon 30/618:45BHD - IAD

2 stops29h 45mAer Lingus

Deal found 12/6£720

Sun 20/706:50BHD - IAD

1 stop18h 25mBritish Airways

Deal found 12/6£1,099

Mon 30/606:30BHD - IAD

1 stop14h 05mVirgin Atlantic

Deal found 11/6£1,276

Mon 30/617:25BHD - IAD

1 stop27h 10mKLM

Deal found 12/6£1,296

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.

BFS - IAD

BFSIAD

Belfast Intl

Thu 3/7

06:00-09:37

2 stops32h 37m

Washington, D.C. Dulles Intl

Wed 9/7

14:25-18:35

2 stops23h 10m

£622

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 3/11

17:20-15:45

1 stop27h 25m

Washington, D.C. Dulles Intl

Tue 30/12

17:35-16:50

1 stop18h 15m

£1,875

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 4/11

08:40-19:30

2 stops15h 50m

Washington, D.C. Dulles Intl

Tue 30/12

21:55-16:45

1 stop13h 50m

£1,896

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 3/11

19:30-15:35

2 stops25h 05m

Washington, D.C. Dulles Intl

Sat 27/12

18:15-11:10

1 stop11h 55m

£1,927

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 4/11

06:30-16:35

2 stops15h 05m

Washington, D.C. Dulles Intl

Sat 27/12

17:35-16:50

1 stop18h 15m

£1,932

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 4/11

06:55-15:35

2 stops13h 40m

Washington, D.C. Dulles Intl

Fri 26/12

17:05-12:50

2 stops14h 45m

£1,935

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Tue 4/11

06:30-16:35

2 stops15h 05m

Washington, D.C. Dulles Intl

Fri 26/12

17:35-16:50

1 stop18h 15m

£2,352

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 30/6

18:45-19:30

2 stops29h 45m

£720

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Sun 20/7

06:50-20:15

1 stop18h 25m

£1,099

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

Mon 30/6

06:30-15:35

1 stop14h 05m

£1,276

Flights are sorted by cheapest return flights first.

Deals found on 12/6

Showing 1-10 of 11 results

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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.

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 Northern Ireland to Washington, D.C. Dulles Intl Airport

What is the cheapest time of day to fly from NIR to IAD?

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

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

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

8.0

Very Good

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

8.0

Very Good

8.0

Very Good

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

7.8

Good

8.0

Very Good

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Virgin Atlantic

7.4

Good

8.0

Very Good

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

American Airlines

7.2

Good

8.0

Very Good

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

7.1

Good

8.0

Very Good

Reviews

1 / 20

10.0

Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

Related info for your journey

What are the cheapest airlines to fly from Northern Ireland to Washington, D.C. Dulles Intl Airport one-way?
£720 is the cheapest one-way deal found within the past few days, from Aer Lingus. You may also be able to find cheap deals on British Airways and Virgin Atlantic, with prices starting from £1,099 and £1,276, respectively.
Can I find deals for flights from Northern Ireland to Dulles Intl that include hotel bookings?
Yes. In addition to deals on Northern Ireland to Dulles Intl flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Northern Ireland to Dulles Intl?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Northern Ireland to Dulles Intl.
Can I find deals for business class flights from Northern Ireland to Dulles Intl?
Yes. Cheapflights offers flight deals from Northern Ireland 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.
What is the cheapest month to book a flight from Northern Ireland to Washington, D.C. Dulles Intl Airport?
Currently, January is the cheapest month in which you can book a flight from Northern Ireland to Washington, D.C. Dulles Intl Airport (average of £599). Flying from Northern Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of £947). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Alternative routes for Northern Ireland to Dulles Intl

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Complete your trip

Washington, D.C. Dulles Intl Airport car hire

Washington, D.C. car hire

Dupont Circle car hire

Georgetown car hire

Downtown car hire

Capitol Hill car hire

Foggy Bottom - West End car hire

Southwest Waterfront car hire

Columbia Heights car hire

Adams Morgan car hire

Anacostia car hire

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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.

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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.

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