$394 Cheap United flights Washington (IAD) to Dublin (DUB)

View $394 flight on Wed, Nov 26, 2025Opens in a new window

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

$394 Cheap United flights Washington (IAD) to Dublin (DUB)

Prices were available within the past 7 days and start at $394 for one-way flights and $463 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

United
Sun, Nov 16 - Wed, Dec 3
IAD
Washington
DUB
Dublin
$463 Roundtrip, just found
$463
Roundtrip
just found
Select United flight, departing Sun, Nov 16 from Washington to Dublin, returning Wed, Dec 3, priced at $463 just found
United
Mon, Nov 3 - Fri, Nov 14
IAD
Washington
DUB
Dublin
$468 Roundtrip, found 11 hours ago
$468
Roundtrip
found 11 hours ago
Select United flight, departing Mon, Nov 3 from Washington to Dublin, returning Fri, Nov 14, priced at $468 found 11 hours ago
United
Wed, Nov 19 - Thu, Nov 27
IAD
Washington
DUB
Dublin
$468 Roundtrip, just found
$468
Roundtrip
just found
Select United flight, departing Wed, Nov 19 from Washington to Dublin, returning Thu, Nov 27, priced at $468 just found
United
Tue, Aug 12 - Fri, Aug 22
IAD
Washington
DUB
Dublin
$472 Roundtrip, found 4 hours ago
$472
Roundtrip
found 4 hours ago
Select United flight, departing Tue, Aug 12 from Washington to Dublin, returning Fri, Aug 22, priced at $472 found 4 hours ago
United
Wed, Dec 3 - Tue, Dec 9
IAD
Washington
DUB
Dublin
$473 Roundtrip, found 1 day ago
$473
Roundtrip
found 1 day ago
Select United flight, departing Wed, Dec 3 from Washington to Dublin, returning Tue, Dec 9, priced at $473 found 1 day ago
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, 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 57 mins

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 $463 from IAD to DUB. Affordable one-way options from $394 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."

Explore a world of travel with Expedia

*Available to One Key members.