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$228+ Cheap flights from Dulles Intl (IAD) to Dublin (DUB)

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 9/23. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — DUB
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to Dublin are usually found in January or February, booked 57 days in advance, depart on a Tuesday or Wednesday and return on a Wednesday

Cheap flight deals from Dulles Intl to Dublin

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Dublin (DUB). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated August 14, 2025.

Round-trip from

$457
(FlightHub)

One-way from

$228
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$701

Good round-trip deal

$547 or less

Good one-way deal

$426 or less
From Washington, D.C. Dulles Intl to Dublin
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One-way flight from Washington, D.C. Dulles Intl to Dublin
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Highest demand for flights based on searches. 13% potential increase in price ($110 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Dublin.
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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Dublin.
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Find flight deals from Dulles Intl to Dublin

Cheapest flights from Dulles Intl to Dublin
Explore the most affordable flight options available from Dulles Intl to Dublin. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This FlightHub deal was found by Cheapflights users on 8/14. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/310:05 pmIAD - DUB
2 stops32h 25mScandinavian Airlines
Tue 10/2111:45 amDUB - IAD
2 stops37h 14mScandinavian Airlines
Deal found 8/14$457
This Booking.com deal was found by Cheapflights users on 8/14. 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 9/118:25 pmIAD - DUB
Nonstop6h 50mAer Lingus
Thu 9/184:00 pmDUB - IAD
Nonstop7h 55mAer Lingus
Deal found 8/14$458
This FlightHub deal was found by Cheapflights users on 8/12. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/195:05 pmIAD - DUB
Nonstop6h 50mAer Lingus
Sun 11/234:20 pmDUB - IAD
Nonstop8h 10mAer Lingus
Deal found 8/12$459
This CheapOair deal was found by Cheapflights users on 8/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/25:05 pmIAD - DUB
Nonstop6h 50mAer Lingus
Sat 11/812:15 pmDUB - IAD
Nonstop8h 20mAer Lingus
Deal found 8/12$460
This Booking.com deal was found by Cheapflights users on 8/12. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/138:25 pmIAD - DUB
Nonstop6h 55mAer Lingus
Fri 9/1912:50 pmDUB - IAD
Nonstop8h 00mAer Lingus
Deal found 8/12$461
This CheapOair deal was found by Cheapflights users on 8/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/198:25 pmIAD - DUB
Nonstop6h 50mAer Lingus
Sat 11/14:20 pmDUB - IAD
Nonstop8h 10mAer Lingus
Deal found 8/14$462
This United Airlines deal was found by Cheapflights users on 8/11. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/2310:20 pmIAD - DUB
Nonstop7h 00mUnited Airlines
Wed 12/39:00 amDUB - IAD
1 stop17h 20mUnited Airlines
Deal found 8/11$464
This CheapOair deal was found by Cheapflights users on 8/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/168:25 pmIAD - DUB
Nonstop6h 55mAer Lingus
Fri 8/2212:50 pmDUB - IAD
Nonstop8h 00mAer Lingus
Deal found 8/12$466
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/1010:20 pmIAD - DUB
1 stop20h 45mTAP AIR PORTUGAL
Tue 9/166:50 pmDUB - IAD
1 stop25h 30mTAP AIR PORTUGAL
Deal found 8/14$467
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/45:00 pmIAD - DUB
1 stop12h 00mTAP AIR PORTUGAL
Sun 10/125:30 amDUB - IAD
1 stop14h 50mTAP AIR PORTUGAL
Deal found 8/12$468
This United Airlines deal was found by Cheapflights users on 8/14. 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.
Sun 10/1210:15 pmIAD - DUB
Nonstop7h 05mUnited Airlines
Fri 11/1412:05 pmDUB - IAD
Nonstop8h 15mUnited Airlines
Deal found 8/14$469

Cheapflights Fare Finder

 
Customize your flight search to find flights from Dulles Intl to Dublin 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 August 14, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Dublin that are best for you.

Fly from

Dulles Intl

Fly to

Dublin

Route

Depart

Return

Price

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Sun 11/30

4:30 pm-7:10 am

1 stop9h 40m

Dublin

Sun 12/7

9:00 am-11:52 am

2 stops31h 52m

$457

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Wed 10/1

10:20 pm-12:05 am

1 stop20h 45m

Dublin

Mon 10/6

6:50 pm-8:50 pm

1 stop31h 00m

$458

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Mon 10/6

10:20 pm-10:00 am

1 stop30h 40m

Dublin

Sun 10/12

5:30 am-3:20 pm

1 stop14h 50m

$459

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Mon 10/13

10:20 pm-10:00 am

1 stop30h 40m

Dublin

Sun 10/19

5:30 am-3:20 pm

1 stop14h 50m

$459

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Mon 10/6

10:20 pm-10:00 am

1 stop30h 40m

Dublin

Fri 10/17

5:30 am-8:50 pm

1 stop20h 20m

$459

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Fri 10/31

11:20 pm-10:20 am

Nonstop7h 00m

Dublin

Mon 11/3

9:00 am-3:54 pm

1 stop11h 54m

$463

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Wed 11/19

10:20 pm-10:20 am

Nonstop7h 00m

Dublin

Sun 11/23

9:00 am-3:54 pm

1 stop11h 54m

$463

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Sun 10/19

7:05 pm-7:10 am

Nonstop7h 05m

Dublin

Sat 11/1

8:00 am-3:54 pm

1 stop11h 54m

$463

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Fri 10/31

11:20 pm-10:20 am

Nonstop7h 00m

Dublin

Mon 11/3

9:00 am-11:39 am

2 stops31h 39m

$463

Washington, D.C.Dublin

IAD - DUB

IADDUB

Washington, D.C. Dulles Intl

Tue 11/18

10:20 pm-10:20 am

Nonstop7h 00m

Dublin

Sun 11/23

9:00 am-8:29 pm

1 stop16h 29m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 20 results
1
2

The best insider tips for Washington, D.C. Dulles Intl Airport to Dublin flights

Snippets provided in this section are AI-generated based on a summarization of Cheapflights-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to Dublin trip
Airports
IAD

For a smooth departure, use the Aerotrain to navigate between terminals, but be prepared for long walks from the train to certain gates.

Read more about IADby Ramsey Qubein
DUB

Upon arrival at DUB, use the Aircoach or Dublin Express for a quick 30-40 minute ride into central Dublin.

Read more about DUBby James March
Our travel experts
James March

James March

Expert on DUB

James March

James March

For UK-based James March, nothing beats the thrill and chaos of arriving in a new city for the first time, and he tries to put that feeling into his writing and inspire others to travel too. From Birmingham to Blackpool and Leicester to Liverpool, James has reviewed hotels, written narratives and created guides for those who love to travel.

Read more
Ramsey Qubein

Ramsey Qubein

Expert on IAD

Ramsey Qubein

Ramsey Qubein

An avid traveler and aviation expert who has visited 173 countries, all 50 states and seven continents, Ramsey Qubein flies nearly 400,000 miles a year. As a North Carolina-based freelance journalist for publications including Conde Nast Traveler, Forbes, USA Today and Bloomberg among others, he explores the latest trends in aviation, hospitality, cruises and business.

Read more

Best time to book a flight from Dulles Intl to Dublin

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

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to Dublin?

Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Dublin. Price data was last updated on August 8, 2025.

The best time to book flights from Washington, D.C. Dulles Intl Airport to Dublin is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

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

Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Dublin (average of $509). Flying from Washington, D.C. Dulles Intl Airport to Dublin in June is currently the most expensive (average of $925). 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 IAD to DUB?

Find hourly flight availability from Dulles Intl to Dublin. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated August 14, 2025.

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Dublin in the afternoon. Doing so could potentially save you 25% on the flight price compared to flying in the morning, which is usually more expensive.

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

Explore weekly flight availability from Dulles Intl to Dublin. 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 August 14, 2025.

The most flights from IAD to DUB are scheduled on a Monday (14 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (10 on average).

What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to Dublin?

Share of 1-stop round-trip flights from Washington, D.C. Dulles Intl Airport to Dublin chosen by Cheapflights users in the past 12 months, using the same layover each way.

Reykjavik (KEF) – chosen by Cheapflights users on 67% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to Dublin on Cheapflights.

What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to Dublin?

Average round-trip fare for 1-stop flights from Washington, D.C. Dulles Intl Airport to Dublin, chosen by Cheapflights users in the past 12 months, with the same layover each way.

Copenhagen (CPH) is the most affordable 1-stop option, with an average round-trip price of $481.

What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to Dublin?

Shortest average travel time for 1-stop one-way flights from Washington, D.C. Dulles Intl Airport to Dublin, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.

Flights via Reykjavik (KEF) have the shortest average one-way travel time for 1-stop routes: 9h 35m.

Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to Dublin?

Average layover duration for 1-stop one-way flights from Washington, D.C. Dulles Intl Airport to Dublin, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.

Flights via Reykjavik (KEF) offer the fastest connection on this route, with an average layover time of 1h 44m.

Reviews of airlines servicing Dublin

Get insights into the airlines that provide service to Dublin. 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 Dublin. Reviews last updated August 14, 2025.
Peruse reviews from past customers who have flown with United Airlines, American Airlines, and Aer Lingus from Washington, D.C. Dulles Intl Airport to Dublin 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
8,916 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
United Airlines
7.4
Good
8,916 reviews
United Airlines
7.4
Good
8,916 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,916 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Aer Lingus
7.1
Good
1,214 reviews
United Airlines
7.4
Good
8,916 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
Icelandair
7.0
Good
526 reviews
United Airlines
7.4
Good
8,916 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??
PLAY
7.0
Good
103 reviews
United Airlines
7.4
Good
8,916 reviews

Overall

7.4

Crew

8.1

Comfort

7.3

Food

6.6

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
4.0
Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

Find useful and relevant information for your journey from Dulles Intl to Dublin. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Dublin from Washington, D.C. Dulles Intl?

    Most people fly into Dublin (DUB) if they book a flight to Dublin from Washington, D.C. Dulles Intl. On average, Dublin has 13 inbound flights from Washington, D.C. Dulles Intl per day from 9 airlines. Dublin is conveniently located just 5.7 mi from Dublin’s city center.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to Dublin round-trip?

    Cheapflights users have booked flights from Washington, D.C. Dulles Intl Airport to Dublin round-trip from $283. Other airlines that can offer you cheap pricing are Scandinavian Airlines, from $330, and Icelandair, from $424. PLAY is 60% cheaper than the average price of flights available within the next 90 days to this destination.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to Dublin on time: SWISS (59%), Lufthansa (59%), Air Canada (57%).

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

    On average you can expect to pay $1,895 for a flight from Washington, D.C. Dulles Intl Airport to Dublin. The cheapest flight overall is $313 while the most popular route, (Washington, D.C. Dulles Intl - Dublin) is currently priced at $377.

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

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

  • How can I find direct flights from Dulles Intl to Dublin?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to Dublin.

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

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

    Currently, November is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Dublin (average of $509). Flying from Washington, D.C. Dulles Intl Airport to Dublin in June is currently the most expensive (average of $925). 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 Dublin?

Book flights to Dublin if you plan to visit one of these locations
Maynooth
Castleknock
Swords
Wicklow
Leixlip

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Top 9 airlines flying from Dulles Intl to Dublin

Discover the top 9 airlines that operate flights from Dulles Intl to Dublin. 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
PLAYCheapest$283Average$412FlexibilityNo cancel feeOn-timeN/A
Scandinavian AirlinesCheapest$330Average$488FlexibilityNo cancel feeOn-time77%
IcelandairCheapest$424Average$662FlexibilityNo cancel feeOn-time76%
TAP AIR PORTUGALCheapest$428Average$587FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$469Average$686FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$484Average$661FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$543Average$856FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$643Average$889FlexibilityNo cancel feeOn-time71%
LufthansaCheapest$661Average$881FlexibilityNo cancel feeOn-time76%

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