$487 Cheap Aer Lingus flights Denver (DEN) to Dublin (DUB)

You can discover cheap return Aer Lingus flights from $540 from DEN to DUB by organizing your results from “Price (lowest to highest)” on Expedia. Or search for bargains from $487 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.

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.

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.

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.

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.

Dublin Airport (DUB) is the primary Dublin gateway for Aer Lingus flights from Denver Intl. Airport (DEN).

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.

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.

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.”