Dulles Intl

$366+ 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 4/21. Fares are subject to change and may not be available on all flights or dates of travel.
DUB — IAD
Feb 25 — Mar 41
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 February 20, 2025.

Most accurate provider

Gurufare
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$400
(Flightnetwork)

One-way from

$366
(Kiwi.com)

Popular in

July

Cheapest in

January

Average price

$505

Good round-trip deal

$638 or less

Good one-way deal

$395 or less
Provider with most accurate pricing for Dublin-Washington, D.C. (WAS) flight deals.
Provider most trusted by Cheapflights users for Dublin-Washington, D.C. (WAS) flights.
From Ireland to Washington, D.C. Dulles Intl
One-way flight from Ireland to Washington, D.C. Dulles Intl
Highest demand for flights based on searches. 20% potential increase in price ($146 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Average for round-trip flights in February 2025
Price to beat on a round-trip flight from Ireland to Washington, D.C. Dulles Intl.
Price to beat on a one-way flight from Ireland to Washington, D.C. Dulles Intl.

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 February 20, 2025.

This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2412:15 pmDUB - IAD
1 stop14h 55mIcelandair
Wed 10/811:15 pmIAD - DUB
1 stop30h 50mIcelandair
Deal found 2/20$397
This Flightnetwork deal was found by Cheapflights users on 2/20. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/312:20 pmDUB - IAD
2 stops36h 39mScandinavian Airlines
Mon 4/710:05 pmIAD - DUB
1 stop32h 45mScandinavian Airlines
Deal found 2/20$400
This Gotogate deal was found by Cheapflights users on 2/20. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/2712:30 pmDUB - IAD
Nonstop8h 10mAer Lingus
Wed 3/55:10 pmIAD - DUB
Nonstop6h 45mAer Lingus
Deal found 2/20$489
This Booking.com deal was found by Cheapflights users on 2/19. 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 2/271:10 pmDUB - IAD
1 stop11h 35mBritish Airways
Wed 3/56:00 pmIAD - DUB
1 stop13h 10mBritish Airways
Deal found 2/19$490
This Delta deal was found by Cheapflights users on 2/18. 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 3/45:55 amDUB - IAD
1 stop14h 50mDelta
Tue 3/115:22 pmIAD - DUB
2 stops18h 18mDelta
Deal found 2/18$497
This Air France deal was found by Cheapflights users on 2/20. 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.
Mon 3/36:00 amORK - IAD
1 stop14h 45mMultiple Airlines
Sun 3/97:30 pmIAD - ORK
1 stop11h 05mMultiple Airlines
Deal found 2/20$498
This Air France deal was found by Cheapflights users on 2/19. 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 2/278:50 amDUB - IAD
2 stops15h 05mMultiple Airlines
Wed 3/56:30 pmIAD - DUB
1 stop13h 35mMultiple Airlines
Deal found 2/19$500
This United Airlines deal was found by Cheapflights users on 2/19. 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 11/59:00 amDUB - IAD
1 stop11h 51mUnited Airlines
Sun 11/910:05 pmIAD - DUB
Nonstop7h 00mUnited Airlines
Deal found 2/19$551
This Lufthansa deal was found by Cheapflights users on 2/20. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/278:30 amDUB - IAD
1 stop16h 50mLufthansa
Wed 3/510:05 pmIAD - DUB
Nonstop7h 00mLufthansa
Deal found 2/20$560
This Delta deal was found by Cheapflights users on 2/20. 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.
Sat 3/86:00 amORK - IAD
2 stops17h 55mDelta
Wed 3/126:35 pmIAD - ORK
1 stop14h 20mDelta
Deal found 2/20$561
This KLM deal was found by Cheapflights users on 2/20. 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 4/16:00 amORK - IAD
1 stop14h 35mKLM
Mon 4/79:20 pmIAD - ORK
2 stops14h 15mKLM
Deal found 2/20$585
This TravelUp deal was found by Cheapflights users on 2/20. 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 TravelUp is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/19:15 pmSNN - IAD
1 stop23h 35mBritish Airways
Mon 4/75:50 pmIAD - SNN
1 stop12h 30mBritish Airways
Deal found 2/20$624

Find flights from Ireland to Dulles Intl within your budget

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 February 20, 2025.

Fly from

Ireland

Fly to

Dulles Intl

Route

Depart

Return

Price

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 4/3

12:20 pm-7:59 pm

2 stops36h 39m

Washington, D.C. Dulles Intl

Mon 4/7

10:05 pm-11:50 am

1 stop32h 45m

$400

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 4/3

12:15 pm-7:20 pm

1 stop12h 05m

Washington, D.C. Dulles Intl

Mon 4/7

8:30 pm-11:05 am

1 stop9h 35m

$402

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 2/27

12:30 pm-3:40 pm

Nonstop8h 10m

Washington, D.C. Dulles Intl

Wed 3/5

5:10 pm-4:55 am

Nonstop6h 45m

$489

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 2/27

1:10 pm-7:45 pm

1 stop11h 35m

Washington, D.C. Dulles Intl

Wed 3/5

6:00 pm-12:10 pm

1 stop13h 10m

$490

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Tue 3/4

5:55 am-3:45 pm

1 stop14h 50m

Washington, D.C. Dulles Intl

Tue 3/11

5:22 pm-3:40 pm

2 stops18h 18m

$497

CorkWashington, D.C.

ORK - IAD

ORKIAD

Cork

Mon 3/3

6:00 am-3:45 pm

1 stop14h 45m

Washington, D.C. Dulles Intl

Sun 3/9

7:30 pm-10:35 am

1 stop11h 05m

$498

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 2/27

8:50 am-6:55 pm

2 stops15h 05m

Washington, D.C. Dulles Intl

Wed 3/5

6:30 pm-1:05 pm

1 stop13h 35m

$500

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Thu 2/27

8:30 am-8:20 pm

1 stop16h 50m

Washington, D.C. Dulles Intl

Wed 3/5

10:05 pm-10:05 am

Nonstop7h 00m

$560

CorkWashington, D.C.

ORK - IAD

ORKIAD

Cork

Sat 3/8

6:00 am-6:55 pm

2 stops17h 55m

Washington, D.C. Dulles Intl

Wed 3/12

6:35 pm-12:55 pm

1 stop14h 20m

$561

DublinWashington, D.C.

DUB - IAD

DUBIAD

Dublin

Sun 3/2

9:00 am-8:17 pm

2 stops16h 17m

Washington, D.C. Dulles Intl

Sat 3/8

10:05 pm-10:05 am

Nonstop7h 00m

$563

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 36 results
1
2
3
4

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.

Travel insights for flights from Ireland to Dulles Intl

Get recent, data-driven insights about flights from Ireland to Dulles Intl including ideal travel times, pricing trends, and more.

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

Currently, August is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Ireland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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 February 20, 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 at noon, which can drop the price by up to 9% 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 February 20, 2025.

The most flights from IE0 to IAD are scheduled on a Monday (3 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

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 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.

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 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).

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 February 20, 2025.
Read reviews from past customers who have flown Delta, KLM and Austrian Airlines from Ireland to Washington, D.C.. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
8.0
Very good

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

8.0
Very good
8.0
Very good

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

8.0
Very good

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

8.0
Very good

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

8.0
Very good

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

8.0
Very good

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Comfort

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

TUS - LAX

Delta has consistently been the best U.S. airline for my travels and this flight was no exception

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.
  • 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 ($382), Aer Lingus ($395), and TAP AIR PORTUGAL ($418).

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

  • 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 (90%), United Airlines( 90%).

  • 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 $907, our data shows the cheapest flight currently is $362. When looking at the most popular route, (Dublin - Washington, D.C. Dulles Intl), you can expect to pay $404 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, August is the cheapest month in which you can book a flight from Ireland to Washington, D.C. Dulles Intl Airport (average of $309). Flying from Ireland to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $389). 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 Ireland?

Book flights to Ireland if you plan to visit one of these locations
Arlington
Alexandria
Fairfax
Springfield
Rockville
Tysons
Gaithersburg
Silver Spring
Fredericksburg
Linthicum Heights
Laurel
Falls Church
Woodbridge
Sterling
Easton
Herndon
Bowie
Reston
National Harbor
Oxon Hill

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.

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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$256Average$330FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$419Average$643FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$605Average$726FlexibilityNo 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.