HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Dulles Intl

$371+ 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 12/3. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — IAD
Dec 13 — Dec 201
Sat 12/13
Sat 12/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Ireland to Dulles Intl with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 November 13, 2025.

Most accurate provider

Justfly.com
3 stars

Most trusted provider

Justfly.com
3 stars

Round-trip from

$403
(Justfly.com)

One-way from

$371
(Mytrip)

Popular in

August

Cheapest in

January

Average price

$493

Good round-trip deal

$549 or less

Good one-way deal

$539 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. 14% potential increase in price ($92 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 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

Find 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 November 13, 2025.

This Booking.com deal was found by Cheapflights users on 11/11. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/1111:30 amDUB - IAD
1 stop12h 00mIcelandair
Sun 12/147:40 pmIAD - DUB
1 stop9h 35mIcelandair
Deal found 11/11$416
This Mytrip deal was found by Cheapflights users on 11/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1511:30 amDUB - IAD
1 stop12h 00mIcelandair
Sat 1/177:40 pmIAD - DUB
1 stop9h 35mIcelandair
Deal found 11/12$431
This Icelandair deal was found by Cheapflights users on 11/12. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/511:30 amDUB - IAD
1 stop12h 00mIcelandair
Mon 12/87:40 pmIAD - DUB
1 stop9h 35mIcelandair
Deal found 11/12$444
This Mytrip deal was found by Cheapflights users on 11/12. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1611:30 amDUB - IAD
1 stop12h 00mIcelandair
Sat 1/177:40 pmIAD - DUB
1 stop9h 35mIcelandair
Deal found 11/12$456
This Iberia deal was found by Cheapflights users on 11/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/188:50 amDUB - IAD
1 stop11h 45mMultiple Airlines
Sat 1/179:45 pmIAD - DUB
1 stop11h 30mMultiple Airlines
Deal found 11/11$460
This Iberia deal was found by Cheapflights users on 11/11. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/158:50 amDUB - IAD
1 stop11h 45mMultiple Airlines
Sat 1/176:20 pmIAD - DUB
1 stop10h 30mMultiple Airlines
Deal found 11/11$461
This Delta deal was found by Cheapflights users on 11/11. 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 11/268:50 amDUB - IAD
1 stop12h 15mDelta
Tue 2/246:50 pmIAD - DUB
1 stop15h 55mDelta
Deal found 11/11$468
This American Airlines deal was found by Cheapflights users on 11/11. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/512:55 pmDUB - IAD
1 stop32h 23mAmerican Airlines
Mon 12/87:59 amIAD - DUB
2 stops23h 36mAmerican Airlines
Deal found 11/11$470
This Delta deal was found by Cheapflights users on 11/11. 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 11/265:55 amDUB - IAD
1 stop15h 10mDelta
Thu 2/2612:23 pmIAD - DUB
1 stop15h 22mDelta
Deal found 11/11$471
This Mytrip deal was found by Cheapflights users on 11/11. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/104:20 pmDUB - IAD
Nonstop8h 10mAer Lingus
Wed 12/175:05 pmIAD - DUB
Nonstop6h 50mAer Lingus
Deal found 11/11$473
This Air France deal was found by Cheapflights users on 11/11. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:00 amORK - IAD
1 stop15h 05mMultiple Airlines
Thu 12/46:50 pmIAD - ORK
1 stop14h 55mMultiple Airlines
Deal found 11/11$574
This American Airlines deal was found by Cheapflights users on 11/12. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/77:50 amSNN - IAD
2 stops16h 41mAmerican Airlines
Sat 12/136:20 pmIAD - SNN
1 stop12h 10mAmerican Airlines
Deal found 11/12$629

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 November 13, 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

Fri 12/5

11:30 am-6:30 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

Mon 12/8

7:40 pm-10:15 am

1 stop9h 35m

$444

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Mon 1/12

11:30 am-6:30 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

Wed 1/21

7:40 pm-10:15 am

1 stop9h 35m

$456

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Mon 1/12

11:30 am-6:30 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

Tue 1/20

7:40 pm-10:15 am

1 stop9h 35m

$456

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Mon 1/12

11:30 am-6:30 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

Mon 1/19

7:40 pm-10:15 am

1 stop9h 35m

$456

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 2/3

5:00 am-2:35 pm

1 stop14h 35m

Washington, D.C. Dulles Intl

Sun 2/8

8:30 pm-5:45 pm

1 stop16h 15m

$459

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 11/26

8:50 am-4:05 pm

1 stop12h 15m

Washington, D.C. Dulles Intl

Tue 2/24

6:50 pm-3:45 pm

1 stop15h 55m

$468

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Mon 1/12

9:00 am-3:46 pm

1 stop11h 46m

Washington, D.C. Dulles Intl

Sun 1/18

1:05 pm-8:10 am

1 stop14h 05m

$479

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Sun 1/11

9:00 am-8:26 pm

1 stop16h 26m

Washington, D.C. Dulles Intl

Wed 1/21

1:05 pm-8:10 am

1 stop14h 05m

$479

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Wed 11/26

8:50 am-4:05 pm

1 stop12h 15m

Washington, D.C. Dulles Intl

Mon 12/8

6:50 pm-3:45 pm

1 stop15h 55m

$485

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Mon 1/12

11:30 am-6:30 pm

1 stop12h 00m

Washington, D.C. Dulles Intl

Sat 1/17

7:40 pm-10:15 am

1 stop9h 35m

$485

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/10

Showing 1-10 of 44 results
1
2
3
...
5

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 November 13, 2025.

When flying from Ireland to Washington, D.C. Dulles Intl Airport, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 18% versus a flight in the morning.

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 November 13, 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).

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 November 13, 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
9,017 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
United Airlines
7.4
Good
9,017 reviews
United Airlines
7.4
Good
9,017 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Aer Lingus
7.2
Good
1,370 reviews
United Airlines
7.4
Good
9,017 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000
Icelandair
7.1
Good
578 reviews
United Airlines
7.4
Good
9,017 reviews

Comfort

7.3

Entertainment

7.1

Food

6.6

Boarding

7.7

Crew

8.1

Overall

7.4

Reviews

1 / 20
2.0
Mediocre

Sebrena,Oct 2025

IAH - RSW

The worst that I have ever experienced in my life so bad if it was free I'm not ever going to use your Airline again I dont believe ..... very disappointed 😞 😔0000000000000

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 Icelandair, Delta, and American Airlines fly from Ireland to Washington, D.C. Dulles Intl Airport in about 12h. The time it takes to get you to your destination can typically vary by up to 3h 05m. Airlines will cover a distance of 3393 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 TAP AIR PORTUGAL ($435), British Airways ($457), and Aer Lingus ($487).

  • 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: Air Canada (85%), United Airlines (85%), Lufthansa( 82%).

  • 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 $1,013, our data shows the cheapest flight currently is $446. When looking at the most popular route, (Dublin - Washington, D.C. Dulles Intl), you can expect to pay $420 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
Tysons
Woodbridge
Arlington
Owings Mills
Springfield
Hanover
Silver Spring
Fairfax
Fredericksburg
Falls Church
Linthicum Heights
Manassas
Laurel
Towson
National Harbor
Waldorf
Bowie
Largo
McLean

Browse 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 Ireland to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Dulles Intl flights
Charles de Gaulle to Dulles Intl flights
Heathrow to Baltimore flights
Orly to Dulles Intl flights
Charles de Gaulle to Baltimore flights
Charles de Gaulle to Reagan-National flights
Frankfurt to Dulles Intl flights
Bruxelles-National to Dulles Intl flights
Gatwick to Dulles Intl flights
Gatwick to Baltimore flights
London City to Dulles Intl flights
Heathrow to Reagan-National flights
Gatwick to Reagan-National flights
Stansted to Dulles Intl flights
Amsterdam to Dulles Intl flights
Luton to Dulles Intl flights
Madrid to Dulles Intl flights
Barcelona-El Prat to Dulles Intl flights
Frederic Chopin to Dulles Intl flights
Dublin to Dulles Intl flights
Madrid to Reagan-National flights
Vienna to Dulles Intl flights
Madrid to Baltimore flights
Frankfurt to Reagan-National flights
Istanbul to Dulles Intl flights
Bruxelles-National to Baltimore flights
Munich to Dulles Intl flights
Frankfurt to Baltimore flights
Bruxelles-National to Reagan-National flights
Leonardo da Vinci/Fiumicino to Dulles Intl flights
Luton to Baltimore flights
Frederic Chopin to Baltimore flights
Zurich to Dulles Intl flights
London City to Reagan-National flights
Barcelona-El Prat to Baltimore flights
Amsterdam to Baltimore flights
Berlin to Dulles Intl flights
Amsterdam to Reagan-National flights
Barcelona-El Prat to Reagan-National flights
Duesseldorf Intl to Baltimore flights
Dublin to Baltimore flights
Athens to Dulles Intl flights
Dublin to Reagan-National flights
Frederic Chopin to Reagan-National flights
Berlin to Baltimore flights
Duesseldorf Intl to Dulles Intl flights
Geneva to Dulles Intl 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 November 13, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$425Average$608FlexibilityNo cancel feeOn-time76%
Aer LingusCheapest$454Average$598FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$643Average$808FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.