$374 Cheap Aer Lingus flights Denver (DEN) to Dublin (DUB)

View $374 flight on Mon, Sep 8, 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

$374 Cheap Aer Lingus flights Denver (DEN) to Dublin (DUB)

Prices were available within the past 7 days and start at $374 for one-way flights and $463 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Aer Lingus
Mon, May 4 - Wed, May 13
DEN
Denver
DUB
Dublin
$463 Roundtrip, found 4 hours ago
$463
Roundtrip
found 4 hours ago
Select Aer Lingus flight, departing Mon, May 4 from Denver to Dublin, returning Wed, May 13, priced at $463 found 4 hours ago
Flights from Denver (DEN) to Dublin (DUB)
Origin airport
Denver Intl.
Destination airport
Dublin
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, JetBlue Airways, KLM, Lufthansa, Swiss International Air Lines, Turkish Airlines, United, WestJet
Popular airline
Lufthansa
Distance
4381 mi
Average flight time
8 hours 45 mins

Frequently asked questions

How much is an Aer Lingus flight from Denver Intl. Airport (DEN) to Dublin Airport (DUB)?
You can discover cheap return Aer Lingus flights from $463 from DEN to DUB by organizing your results from "Price (lowest to highest)" on Expedia. Or search for bargains from $374 for a one-way trip.**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 DEN to DUB with Aer Lingus?
January is one of the cheapest months to travel to Dublin with Aer Lingus. You could also find excellent prices on one-way and round-trip tickets in February.
What is the cheapest time to book flights from Denver Intl. Airport (DEN) to Dublin Airport (DUB) with Aer Lingus?
Getting the best Aer Lingus deals from DEN to DUB often comes down to booking at the right time. You can save 17% on international flights when you book 18 to 29 days before takeoff instead of four to five months ahead. To top it off, you can pocket 17% on average by buying your fare on a Sunday rather than a Friday, which is usually the most expensive day to book.* It's a good idea to start checking out flights about one month before your departure date.*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 Aer Lingus fly nonstop from Denver Intl. Airport (DEN) to Dublin Airport (DUB)?
Use our "Nonstop" filter when looking for direct Aer Lingus flights from DEN to DUB. It's also an easy way to compare other airlines servicing the same nonstop trip.
What is the earliest Aer Lingus flight from DEN to DUB?
To find the earliest departures from DEN to DUB with Aer Lingus, filter your search by "Early Morning" and "Morning." Booking an early flight usually means you'll experience fewer 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 Aer Lingus fly into in Dublin?
Dublin Airport (DUB) is the primary Dublin gateway for Aer Lingus flights from Denver Intl. Airport (DEN).
What kind of luggage can I take on an Aer Lingus flight from Denver Intl. Airport (DEN) to Dublin Airport (DUB)?
Aer Lingus lets travelers bring 1 checked-in bag weighing up to 50 lb with maximum dimensions of 62 inches on standard economy flights from DEN to DUB. Additionally, you can take 1 cabin bag in the cabin. This hand luggage must not exceed 21 inches x 15 inches x 9 inches and weigh less than 22 lb. Baggage rules can differ based on your cabin class and fare type, so check your booking or Aer Lingus's website to avoid any extra fees at the airport.
Why fly with Aer Lingus from DEN to DUB?
Jetting off from DEN to DUB with Aer Lingus comes with plenty of perks, including a rewarding loyalty program and a 4-star airline rating. Plus, when you book through Expedia, One Key™ members can collect OneKeyCash™* to use on select future travel purchases. That's in addition to the Aer Lingus AerClub points you can earn with Aer Lingus.*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 Aer Lingus flight from Denver Intl. Airport (DEN) to Dublin Airport (DUB)?
Depending on the ticket type you purchased, a fee will generally apply if you change or cancel your booking more than 24 hours after it has been confirmed. To find flexible plane tickets, select our "Changes included" or "No cancel fee" filter when looking for flights. For additional information on canceling or changing your reservation, head to "Trips," select your flight and tick "Manage Booking."

Explore a world of travel with Expedia

*Available to One Key members.