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Dulles Intl

$341+ Cheap flights from 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 1/28. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — IAD
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
1 adult, Economy
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Cheap flight deals from Ireland to Dulles Intl

Cheapest flights from Ireland to Dulles Intl
Explore the most affordable flight options available from Ireland to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 28, 2025.

This KLM deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:55 amDUB - IAD
1 stop15h 10mMultiple Airlines
Wed 1/286:50 pmIAD - DUB
1 stop15h 55mMultiple Airlines
Deal found 12/27$753
This United Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:05 pmDUB - IAD
Nonstop8h 15mUnited Airlines
Fri 1/305:15 pmIAD - DUB
1 stop9h 15mUnited Airlines
Deal found 12/26$760
This United Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3010:40 amDUB - IAD
1 stop15h 41mUnited Airlines
Tue 1/278:20 amIAD - DUB
1 stop18h 50mUnited Airlines
Deal found 12/26$766
This United Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3112:05 pmDUB - IAD
Nonstop8h 15mUnited Airlines
Tue 1/2712:40 pmIAD - DUB
2 stops13h 30mUnited Airlines
Deal found 12/26$767
This Delta deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:55 amDUB - IAD
1 stop15h 10mDelta
Sat 1/316:50 pmIAD - DUB
1 stop15h 55mDelta
Deal found 12/27$768
This KLM deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:55 amDUB - IAD
1 stop15h 10mMultiple Airlines
Thu 1/86:50 pmIAD - DUB
1 stop15h 55mMultiple Airlines
Deal found 12/27$773
This Delta deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:55 amDUB - IAD
1 stop15h 10mDelta
Fri 1/3012:23 pmIAD - DUB
1 stop15h 22mDelta
Deal found 12/27$775
This Delta deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:55 amDUB - IAD
1 stop15h 10mDelta
Tue 1/277:49 pmIAD - DUB
2 stops14h 56mDelta
Deal found 12/27$786
This lastminute.com deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/274:20 pmDUB - IAD
Nonstop8h 10mAer Lingus
Sat 1/39:00 pmIAD - DUB
Nonstop6h 50mAer Lingus
Deal found 12/26$798
This United Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:05 pmDUB - IAD
Nonstop8h 15mUnited Airlines
Fri 1/305:15 pmIAD - DUB
1 stop9h 15mUnited Airlines
Deal found 12/26$810
This United Airlines deal was found by Cheapflights users on 12/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/3012:05 pmDUB - IAD
Nonstop8h 15mUnited Airlines
Sun 1/259:00 amIAD - DUB
1 stop17h 10mUnited Airlines
Deal found 12/26$812
This Delta deal was found by Cheapflights users on 12/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/315:55 amDUB - IAD
1 stop15h 10mDelta
Fri 1/3012:23 pmIAD - DUB
1 stop15h 22mDelta
Deal found 12/27$817

Find flight deals from Ireland to Dulles Intl

Keep the following information in mind while searching for Ireland to Dulles Intl flight deals. Data was last updated December 28, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$424
(Mytrip)

One-way from

$341
(Kiwi.com)

Popular in

August

Cheapest in

February

Average price

$618

Good round-trip deal

$678 or less

Good one-way deal

$520 or less
Provider with most accurate pricing for Dublin-Washington, D.C. (WAS) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Dublin-Washington, D.C. (WAS) flights.
Search Deals
From Ireland to Washington, D.C. Dulles Intl
Search Deals
One-way flight from Ireland to Washington, D.C. Dulles Intl
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($87 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from Ireland to Washington, D.C. Dulles Intl.
Search Deals
Price to beat on a one-way flight from Ireland to Washington, D.C. Dulles Intl.
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from 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 2,558,603 searches. Data last updated December 28, 2025.
Use the filters below to find and compare flights from Ireland to Washington, D.C. Dulles Intl Airport that are best for you.

Fly from

Ireland

Fly to

Dulles Intl

Route

Depart

Return

Price

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 2/12

11:30 am-6:50 pm

2 stops60h 20m

Washington, D.C. Dulles Intl

Thu 2/26

8:30 pm-11:20 am

2 stops57h 50m

$492

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 3/4

11:30 am-5:15 pm

2 stops34h 45m

Washington, D.C. Dulles Intl

Wed 3/11

9:30 pm-6:20 pm

1 stop16h 50m

$495

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 2/10

5:55 am-4:05 pm

1 stop15h 10m

Washington, D.C. Dulles Intl

Tue 2/17

12:24 pm-8:00 am

2 stops14h 36m

$498

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Mon 2/9

5:55 am-4:05 pm

1 stop15h 10m

Washington, D.C. Dulles Intl

Mon 2/16

6:50 pm-3:45 pm

1 stop15h 55m

$498

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 1/15

8:50 am-4:05 pm

1 stop12h 15m

Washington, D.C. Dulles Intl

Wed 1/21

12:23 pm-7:50 am

2 stops14h 27m

$498

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Fri 2/20

1:25 pm-4:05 pm

1 stop31h 40m

Washington, D.C. Dulles Intl

Thu 2/26

6:50 pm-3:45 pm

1 stop15h 55m

$498

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 3/4

8:50 am-4:05 pm

1 stop12h 15m

Washington, D.C. Dulles Intl

Wed 3/11

7:50 pm-3:45 pm

1 stop15h 55m

$498

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 2/24

8:50 am-4:05 pm

1 stop12h 15m

Washington, D.C. Dulles Intl

Tue 3/10

1:19 pm-3:45 pm

2 stops22h 26m

$498

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Fri 1/23

5:15 pm-4:05 pm

1 stop27h 50m

Washington, D.C. Dulles Intl

Fri 1/30

6:50 pm-8:00 am

1 stop32h 10m

$500

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 2/11

8:50 am-7:09 pm

2 stops15h 19m

Washington, D.C. Dulles Intl

Wed 2/18

12:24 pm-8:00 am

2 stops14h 36m

$503

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/27

Showing 1-10 of 37 results
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Best time to book a flight from Ireland to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from 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 Ireland to Washington, D.C. Dulles Intl Airport

What is the cheapest month to book a flight from Ireland to Washington, D.C. Dulles Intl Airport?

Currently, December is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Dulles Intl Airport (average of $366). Flying from Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $598). 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.

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

Find hourly flight availability from 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 December 28, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Ireland to Washington, D.C. Dulles Intl Airport as you normally would.

Weekly flight availability from Ireland to Washington, D.C. Dulles Intl Airport

Explore weekly flight availability from Ireland to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated December 28, 2025.

The most flights from IE0 to IAD are scheduled on a Monday (12 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (12 on average).

How often are flights from Ireland to Washington, D.C. delayed?

About 14% of weekly flights between Ireland and Washington, D.C. have experienced delays in the past year, with the average delay time being 152 minutes.

What is the most punctual flight time for Ireland to Washington, D.C. flights?

Historically, flights departing in the early afternoon are less likely to be delayed, whereas flights leaving in the morning tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Sunday tends to have the lowest number of delays on this route, whereas Friday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Ireland to Washington, D.C. flights?

Over the last year, Aer Lingus have had the lowest number of delays on this route, with just 14% of flights being delayed.

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 December 28, 2025.
Peruse reviews from past customers who have flown with United Airlines, Aer Lingus, and Icelandair from Ireland to Washington, D.C. Dulles Intl Airport to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,113 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
United Airlines
7.4
Good
9,113 reviews
United Airlines
7.4
Good
9,113 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Aer Lingus
7.2
Good
1,412 reviews
United Airlines
7.4
Good
9,113 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.
Icelandair
7.0
Good
592 reviews
United Airlines
7.4
Good
9,113 reviews

Entertainment

7.1

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Comfort

7.3

Reviews

1 / 20
10.0
Excellent

Michelle,Dec 2025

DEN - MKE

I liked that the plane waited 5 minutes for a family whose incoming plane was late. This was the last flight of the day to MKE. Flight attendants actually checked in throughout the flight. Although, not really friendly. Happy to see screens on seat backs again. This is my first time not flying first class in over 10 years. It was economy plus.

Related info for your journey

Find useful and relevant information for your journey from 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 Ireland to Washington, D.C. Dulles Intl Airport?

    Airlines like Scandinavian Airlines, Delta, and KLM fly from Ireland to Washington, D.C. Dulles Intl Airport in about 15h 05m. The time it takes to get you to your destination can typically vary by up to 45h 15m. Airlines will cover a distance of 3326 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from Ireland to Washington, D.C. Dulles Intl Airport one-way?

    The cheapest airlines for a one-way flight from Ireland to Washington, D.C. Dulles Intl Airport are Icelandair ($337), Aer Lingus ($381), and American Airlines ($494).

  • What are the most popular routes from Ireland to Washington, D.C. Dulles Intl Airport?

    The most popular route from Ireland to Washington, D.C. Dulles Intl Airport is Dublin - Washington, D.C. Dulles Intl. You may also consider Cork - Washington, D.C. Dulles Intl or Shannon - Washington, D.C. Dulles Intl.

  • What are the most reliable airlines from Ireland to Washington, D.C. Dulles Intl Airport?

    Before booking your flight to Washington, D.C. Dulles Intl Airport from Ireland, check out the most reliable airlines to get you to your destination on time: SWISS (100%), Air Canada (94%), United Airlines( 94%).

  • What are the cheapest flights from Ireland to Washington, D.C. Dulles Intl Airport?

    While on average a flight from Ireland to Washington, D.C. Dulles Intl Airport is generally $1,062, our data shows the cheapest flight currently is $459. When looking at the most popular route, (Dublin - Washington, D.C. Dulles Intl), you can expect to pay $425 for that flight.

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

    Yes. In addition to deals on Ireland to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from 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 Ireland to Dulles Intl.

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

    Yes. Cheapflights offers flight deals from 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 Ireland to Washington, D.C. Dulles Intl Airport?

    Currently, December is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Dulles Intl Airport (average of $366). Flying from Ireland to Washington, D.C. Dulles Intl Airport in July is currently the most expensive (average of $598). 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.

See more FAQs

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

Book flights to Washington, D.C. Dulles Intl Airport if you plan to visit one of these locations
Alexandria
Woodbridge
Tysons
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fredericksburg
Linthicum Heights
Rockville
Laurel
Towson
Manassas
National Harbor
Bowie
Largo
McLean
Clinton
Cordova

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Alternative routes for Ireland to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Frankfurt to Dulles Intl flights
Heathrow to Dulles Intl flights
Charles de Gaulle to Dulles Intl flights
Frankfurt to Baltimore flights
Heathrow to Baltimore flights
Frankfurt to Reagan-National flights
Bruxelles-National to Dulles Intl flights
Istanbul to Dulles Intl flights
Frederic Chopin to Dulles Intl flights
Duesseldorf Intl to Dulles Intl flights
Frederic Chopin to Baltimore flights
Charles de Gaulle to Baltimore flights
Amsterdam to Dulles Intl flights
Munich to Dulles Intl flights
Orly to Dulles Intl flights
Charles de Gaulle to Reagan-National flights
Gatwick to Dulles Intl flights
Heathrow to Reagan-National flights
Madrid to Baltimore flights
London City to Dulles Intl flights
Duesseldorf Intl to Reagan-National flights
Duesseldorf Intl to Baltimore flights
Gatwick to Baltimore flights
Stansted to Dulles Intl flights
Leonardo da Vinci/Fiumicino to Dulles Intl flights
Madrid to Dulles Intl flights
Gatwick to Reagan-National flights
Istanbul to Baltimore flights
Frederic Chopin to Reagan-National flights
Dublin to Dulles Intl flights
Vienna to Dulles Intl flights
Luton to Dulles Intl flights
Istanbul to Reagan-National flights
Vienna to Baltimore flights
Bruxelles-National to Baltimore flights
Zurich to Dulles Intl flights
Barcelona-El Prat to Dulles Intl flights
Bruxelles-National to Reagan-National flights
Munich to Baltimore flights
Lisbon to Dulles Intl flights
Munich to Reagan-National flights
Amsterdam to Baltimore flights
Berlin to Dulles Intl flights
Berlin to Baltimore flights
Hamburg to Dulles Intl flights
Malpensa to Dulles Intl flights
Leonardo da Vinci/Fiumicino to Reagan-National flights

Top 3 airlines flying from Ireland to Dulles Intl

Discover the top 3 airlines that operate flights from 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 2,558,603 searches. Data last updated December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$425Average$603FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$454Average$604FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$643Average$808FlexibilityNo cancel feeOn-time69%

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