$477 Cheap United flights Washington (IAD) to Dublin (DUB)

View $477 flight on Tue, Jan 13, 2026Opens in a new window
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$477 Cheap United flights Washington (IAD) to Dublin (DUB)

Prices were available within the past 7 days and start at $477 for one-way flights and $581 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Mon, Mar 16 - Wed, Mar 25
IAD
Washington
DUB
Dublin
$581 Roundtrip, found 11 hours ago
$581
Roundtrip
found 11 hours ago
Select United flight, departing Mon, Mar 16 from Washington to Dublin, returning Wed, Mar 25, priced at $581 found 11 hours ago
United
Wed, Mar 18 - Wed, Mar 25
IAD
Washington
DUB
Dublin
$586 Roundtrip, found 4 hours ago
$586
Roundtrip
found 4 hours ago
Select United flight, departing Wed, Mar 18 from Washington to Dublin, returning Wed, Mar 25, priced at $586 found 4 hours ago

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

November is typically the cheapest month to fly

From $358 - $720 per traveler.

Alternative airports near Dublin

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Dublin Airport DUB. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $590
DUB
Dublin Airport
CheapestClosest
Average driving time to city center14 min
Flights from $590

Frequently asked questions

How much is a United Airlines flight from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
Use the "Price (lowest to highest)" filter on Expedia to search for cheap United Airlines return flights from $581 from IAD to DUB. Affordable one-way options from $477 are available as well.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from IAD to DUB with United Airlines?
United Airlines flights to Dublin are usually more affordable in the off-peak months of January and February. Whether you're in search of a round-trip or one-way ticket, you could score a better deal then.
What is the cheapest time to book flights from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB) with United Airlines?
Start your search for United Airlines flights from IAD to DUB about one month before you want to leave. The cheapest time to reserve an international flight is generally 18 to 29 days ahead of your departure date when you can save 17% versus booking four to five months in advance. Regardless of fare class or itinerary, the best day of the week to book international airfare is usually Sunday. Friday is often the most expensive. Passengers booking on a Sunday can save 17% on average compared to those who book on a Friday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does United Airlines fly nonstop from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
To see if there's a direct trip from IAD to DUB with United Airlines or other airlines, select the "Nonstop" filter when looking for tickets.
What is the earliest United Airlines flight from IAD to DUB?
To find the earliest departures from IAD to DUB with United Airlines, filter your results by "Early Morning" and "Morning." Choosing an early flight usually means you're less likely to experience cancellations.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does United Airlines fly into in Dublin?
Dublin Airport (DUB) is the main Dublin gateway for United Airlines flights from Washington Dulles Intl. Airport (IAD).
Why fly with United Airlines from IAD to DUB?
A rewarding loyalty program and the ability to collect points through United Mileage Plus are the start of the reasons to depart from IAD to DUB with United Airlines. Plus, when you sign up to our One Key™ program, you can earn OneKeyCash™* alongside any airline loyalty program earnings. It's yours to spend on future travel plans.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my United Airlines flight from Washington Dulles Intl. Airport (IAD) to Dublin Airport (DUB)?
Depending on the type of fare you purchased, a fee will generally apply if you cancel or change your booking more than 24 hours after confirmation. To find flexible plane tickets, select our "Changes included" and "No cancel fee" boxes when you look for flights. To learn more about canceling or changing your reservation, go to "Trips," select your flight and click on "Manage Booking."

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Dublin
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Popular airline
British Airways
Distance
3395 mi
Average flight time
11 hours 53 mins
*Available to One Key members.