$273 Cheap Flights from Washington (IAD) to Dublin (DUB)

View $273 flight on Sun, Aug 17, 2025Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)

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Cheap Flights from Washington to Dublin (IAD-DUB)

Prices were available within the past 7 days and start at $273 for one-way flights and $448 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

TAP Portugal
Mon, Nov 17 - Wed, Nov 26
IAD
Washington
DUB
Dublin
$448 Roundtrip, just found
$448
Roundtrip
just found
Select TAP Portugal flight, departing Mon, Nov 17 from Washington to Dublin, returning Wed, Nov 26, priced at $448 just found
TAP Portugal
Wed, Oct 15 - Mon, Oct 20
IAD
Washington
DUB
Dublin
$452 Roundtrip, just found
$452
Roundtrip
just found
Select TAP Portugal flight, departing Wed, Oct 15 from Washington to Dublin, returning Mon, Oct 20, priced at $452 just found
Aer Lingus
Mon, Dec 1 - Tue, Dec 9
IAD
Washington
DUB
Dublin
$459 Roundtrip, just found
$459
Roundtrip
just found
Select Aer Lingus flight, departing Mon, Dec 1 from Washington to Dublin, returning Tue, Dec 9, priced at $459 just found
United
Tue, Aug 5 - Thu, Aug 21
IAD
Washington
DUB
Dublin
$461 Roundtrip, found 11 hours ago
$461
Roundtrip
found 11 hours ago
Select United flight, departing Tue, Aug 5 from Washington to Dublin, returning Thu, Aug 21, priced at $461 found 11 hours ago
Aer Lingus
Tue, Aug 12 - Wed, Aug 20
IAD
Washington
DUB
Dublin
$463 Roundtrip, just found
$463
Roundtrip
just found
Select Aer Lingus flight, departing Tue, Aug 12 from Washington to Dublin, returning Wed, Aug 20, priced at $463 just found
United
Sun, Nov 30 - Wed, Dec 10
IAD
Washington
DUB
Dublin
$464 Roundtrip, found 3 days ago
$464
Roundtrip
found 3 days ago
Select United flight, departing Sun, Nov 30 from Washington to Dublin, returning Wed, Dec 10, priced at $464 found 3 days ago
TAP Portugal
Mon, Aug 18 - Sun, Aug 24
IAD
Washington
DUB
Dublin
$466 Roundtrip, found 1 day ago
$466
Roundtrip
found 1 day ago
Select TAP Portugal flight, departing Mon, Aug 18 from Washington to Dublin, returning Sun, Aug 24, priced at $466 found 1 day ago
Air Canada
Mon, Nov 17 - Wed, Nov 26
IAD
Washington
DUB
Dublin
$470 Roundtrip, just found
$470
Roundtrip
just found
Select Air Canada flight, departing Mon, Nov 17 from Washington to Dublin, returning Wed, Nov 26, priced at $470 just found
American Airlines
Tue, Nov 25 - Thu, Dec 4
IAD
Washington
DUB
Dublin
$481 Roundtrip, found 1 day ago
$481
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 25 from Washington to Dublin, returning Thu, Dec 4, priced at $481 found 1 day ago
Delta
Wed, Nov 12 - Wed, Nov 19
IAD
Washington
DUB
Dublin
$483 Roundtrip, found 18 hours ago
$483
Roundtrip
found 18 hours ago
Select Delta flight, departing Wed, Nov 12 from Washington to Dublin, returning Wed, Nov 19, priced at $483 found 18 hours ago

Find the cheapest month to fly from Washington (IAD) to Dublin (DUB)

November is typically the cheapest month to fly

From $299 - $683 per traveler.

Graph displaying average flight prices per month

Flights from Washington (IAD) to Dublin (DUB)
Origin airport
Washington Dulles Intl.
Destination airport
Dublin
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Delta, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$447
Distance
3395 mi
Average flight time
11 hours 57 mins

Washington to Dublin Flights

The cheapest times to fly from Washington to Dublin

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Dublin are during the month of November. You can find some of the cheapest flights from Washington to Dublin with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Dublin

Sunday is one of the best days to book for cheap flights from Washington to Dublin: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Dublin

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Dublin in 2025. You can also book with separate airlines for your outbound and return journeys, from $273 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Dublin flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Dublin airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB) cost?
Book cheap return fares starting at $463 from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB). This information is based on the cheapest price found on Expedia for this return journey departing within the next three months. This airfare is for a Aer Lingus flight leaving IAD on August 5 2025 and touching down at DUB. The price was last updated on July 10 2025 and has not changed since.
What is the cheapest month to fly from IAD to DUB?
The cheapest flights from IAD to DUB are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
Which airlines fly direct from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
Take a nonstop flight with Aer Lingus and head straight from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB).
What is the cheapest airline that flies from IAD to DUB?
At the moment, the cheapest carrier operating one-way flights from IAD to DUB is United. You can take off on this route from $394. This fare is based on the lowest price found on Expedia departing within the next three months. The flight takes off from IAD on September 8 2025. Prices were last updated on July 10 2025 and have not changed since.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
On average, you'll only find 1 nonstop flight operating from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB) each day. If this doesn't fit your travel plans, consider flights with a layover. Simply filter your search on Expedia to include one or more stops to find the next best option.
What are the most popular departure times for flights from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
The 5 PM departures from IAD to DUB are the busiest. Prices can be higher for these popular slots. If you're hoping to save money, choose a less crowded time to fly.
What day of the week has the most flights from IAD to DUB?
Friday offers the most flights from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB). Consider traveling on this day and you'll have a greater chance of finding a departure that fits your itinerary.
What is the earliest flight from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
Washington Dulles Intl. Airport (IAD)'s first flight to Dublin Airport (DUB) leaves at approximately 5:10PM UTC-5. With a total travel time of 6h 45m, you'll land at around 4:55AM UTC+0.
How long does it take to fly from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
It takes about 6 hours and 45 minutes to cover the 3,400 mi from IAD to DUB.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
Opt for a flight from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB) that takes off before 3 PM to reduce the risk of delays and cancellations. Departures after this time have a 22% higher chance of being canceled, on average.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports do you fly into for Dublin from Washington Dulles Intl. Airport (IAD)?
If you're traveling on a direct flight from Washington Dulles Intl. Airport (IAD) to Dublin, Dublin Airport (DUB) is the only airport you can land at.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB) last-minute?
Last-minute fares from IAD to DUB are usually more expensive. To secure the cheapest rates, start looking for flights early. That said, if your travel plans are flexible, it's possible to score a cheap ticket just before your departure.
Is it cheaper to book an IAD to DUB flight and hotel package?
Compared with arranging hotels and flights separately, booking an IAD to DUB flight and hotel package with Expedia could lead to significant savings. Better yet, having everything in one easy place takes the hassle out of planning your trip. Just secure your flights and choose from our wide range of hotels, then personalize your trip with extras like activities, tours and car rentals.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
In most cases, you can reschedule or cancel your IAD to DUB flight. However, there may be additional charges, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and guidelines on flight changes, or if you need more information, go to our Customer Service portal.

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