In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 F).

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.

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 vacation 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.

$346+ Cheap Flights from Northern Ireland to Washington, D.C. Dulles Intl Airport

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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 octubre 30, 2025.

dom. 12/147:00 amBHD - IAD

2 stops13h 35mAer Lingus

dom. 12/215:05 pmIAD - BHD

2 stops22h 45mAer Lingus

Deal found 10/30

$982

jue. 11/206:35 amBHD - IAD

1 stop14h 00mAmerican Airlines

lun. 11/2411:25 amIAD - BHD

2 stops18h 15mAmerican Airlines

Deal found 10/29

$984

dom. 12/147:00 amBHD - IAD

3 stops37h 15mMultiple Airlines

dom. 12/215:05 pmIAD - BHD

2 stops22h 45mMultiple Airlines

Deal found 10/30

$1,132

jue. 11/209:05 amBHD - IAD

2 stops15h 25mBritish Airways

lun. 11/249:45 pmIAD - BHD

2 stops13h 35mBritish Airways

Deal found 10/29

$1,199

dom. 12/145:20 pmBHD - IAD

1 stop27h 45mKLM

dom. 12/216:05 pmIAD - BHD

1 stop21h 55mKLM

Deal found 10/30

$1,351

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 layovers in mind to ensure you get the best travel experience. Data last updated octubre 30, 2025.

jue. 3/511:05 amBHD - IAD

1 stop13h 50mAmerican Airlines

lun. 3/96:50 amIAD - BHD

2 stops23h 50mAmerican Airlines

Deal found 10/28

$973

dom. 12/147:00 amBHD - IAD

2 stops13h 35mAer Lingus

dom. 12/215:05 pmIAD - BHD

2 stops22h 45mAer Lingus

Deal found 10/30

$982

dom. 12/147:00 amBHD - IAD

3 stops37h 15mMultiple Airlines

dom. 12/215:05 pmIAD - BHD

2 stops22h 45mMultiple Airlines

Deal found 10/30

$1,132

jue. 11/209:05 amBHD - IAD

2 stops15h 25mBritish Airways

lun. 11/249:45 pmIAD - BHD

2 stops13h 35mBritish Airways

Deal found 10/29

$1,199

dom. 12/145:20 pmBHD - IAD

1 stop27h 45mKLM

dom. 12/216:05 pmIAD - BHD

1 stop21h 55mKLM

Deal found 10/30

$1,351

jue. 11/2010:40 amBHD - IAD

1 stop14h 15mAmerican Airlines

lun. 11/249:45 pmIAD - BHD

1 stop13h 20mAmerican Airlines

Deal found 10/29

$984

Last-minute flights from Northern Ireland to Dulles Intl
Discover last-minute flight deals from Northern Ireland to Dulles Intl. Data last updated octubre 30, 2025 and is based on user searches.

jue. 11/206:35 amBHD - IAD

1 stop14h 00mAmerican Airlines

lun. 11/2411:25 amIAD - BHD

2 stops18h 15mAmerican Airlines

Deal found 10/29

$984

jue. 11/209:05 amBHD - IAD

2 stops15h 25mBritish Airways

lun. 11/249:45 pmIAD - BHD

2 stops13h 35mBritish Airways

Deal found 10/29

$1,199

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 octubre 30, 2025.

dom. 1/117:25 amBHD - IAD

2 stops36h 13mMultiple Airlines

Deal found 10/30

$346

lun. 1/1910:05 amBHD - IAD

3 stops35h 25mMultiple Airlines

Deal found 10/30

$381

lun. 1/198:50 amBFS - IAD

1 stop16h 05mMultiple Airlines

Deal found 10/30

$612

dom. 1/118:55 amBFS - IAD

1 stop16h 20mMultiple Airlines

Deal found 10/30

$697

Cheap flight deals from Northern Ireland to Dulles Intl

Round-trip from	$973 (American Airlines)
One-way from	$346 (Kiwi.com)

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

Search Deals

One-way flight from Northern Ireland to Washington, D.C. Dulles Intl

Search Deals

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

jue. 3/5

11:05 am-7:55 pm

1 stop13h 50m

Washington, D.C. Dulles Intl

lun. 3/9

6:50 am-10:40 am

2 stops23h 50m

$973

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

dom. 12/14

7:00 am-3:35 pm

2 stops13h 35m

Washington, D.C. Dulles Intl

dom. 12/21

5:05 pm-8:50 pm

2 stops22h 45m

$982

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

jue. 11/20

10:40 am-7:55 pm

1 stop14h 15m

Washington, D.C. Dulles Intl

lun. 11/24

9:45 pm-4:05 pm

1 stop13h 20m

$984

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

dom. 12/14

7:00 am-3:15 pm

3 stops37h 15m

Washington, D.C. Dulles Intl

dom. 12/21

5:05 pm-8:50 pm

2 stops22h 45m

$1,132

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

jue. 11/20

9:05 am-7:30 pm

2 stops15h 25m

Washington, D.C. Dulles Intl

lun. 11/24

9:45 pm-4:20 pm

2 stops13h 35m

$1,199

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

dom. 12/14

5:20 pm-4:05 pm

1 stop27h 45m

Washington, D.C. Dulles Intl

dom. 12/21

6:05 pm-9:00 pm

1 stop21h 55m

$1,351

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

dom. 1/11

7:25 am-2:38 pm

2 stops36h 13m

$346

BelfastWashington, D.C.

BHD - IAD

BHDIAD

Belfast City

lun. 1/19

10:05 am-4:30 pm

3 stops35h 25m

$381

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

lun. 1/19

8:50 am-7:55 pm

1 stop16h 05m

$612

BelfastWashington, D.C.

BFS - IAD

BFSIAD

Belfast Intl

dom. 1/11

8:55 am-8:15 pm

1 stop16h 20m

$697

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/30

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 round-trip 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

No data available for this route at this time. Please check back soon.

Related info for your journey

How long is the flight from Northern Ireland to Washington, D.C. Dulles Intl Airport?
A quick flight from Northern Ireland to Washington, D.C. Dulles Intl Airport can take about 13h 35m. American Airlines provides one of the quickest options available for as low as $982. Airlines will cover a distance of 3390 mi. This flight may include one or multiple stops.
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 vacation 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.

See more FAQs

Alexandria

Woodbridge

Tysons

Arlington

Springfield

Hanover

Silver Spring

Fairfax

Fredericksburg

Falls Church

Owings Mills

Linthicum Heights

Manassas

Largo

Oxon Hill

Laurel

Towson

National Harbor

Waldorf

Bowie

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$346+ Cheap flights from Northern Ireland to Dulles Intl (IAD)

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 1/11. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Northern Ireland to Dulles Intl with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

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 octubre 30, 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 octubre 30, 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 octubre 30, 2025.

Round-trip from

One-way from

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.

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

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.

How long is the flight from Northern Ireland to Washington, D.C. Dulles Intl Airport?

Can I find deals for flights from Northern Ireland to Dulles Intl that include hotel bookings?

How can I find direct flights from Northern Ireland to Dulles Intl?

Can I find deals for business class flights from Northern Ireland to Dulles Intl?

Traveling to a place near Washington, D.C. Dulles Intl Airport?

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Alternative routes for Northern Ireland to Dulles Intl

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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 octubre 30, 2025.