Aer Lingus Flight 123 Deals & Information (2025/2026)

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Aer Lingus Flight 123 Route Deals From $398

The cheapest prices found with in the last 7 days for return flights were $534 and $398 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Fri, Feb 27 - Sun, Mar 1
DUB
Dublin
ORD
O'Hare Intl.
$534 Roundtrip, found 15 hours ago
$534
Roundtrip
found 15 hours ago
Select Aer Lingus flight, departing Fri, Feb 27 from Dublin to O'Hare Intl., returning Sun, Mar 1, priced at $534 found 15 hours ago
Fri, Feb 6 - Thu, Feb 12
DUB
Dublin
ORD
O'Hare Intl.
$542 Roundtrip, found 3 days ago
$542
Roundtrip
found 3 days ago
Select Aer Lingus flight, departing Fri, Feb 6 from Dublin to O'Hare Intl., returning Thu, Feb 12, priced at $542 found 3 days ago

Frequently asked questions

What route does flight number EI123 take?
EI123 travels from Dublin Airport to ORD directly. This journey takes 8 hours and 15 minutes.
How often is EI123 on time?
Around 74% of Aer Lingus flight number EI123 services depart as scheduled — so consider leaving some room in your travel plans. If there's a delay, the standard wait time is roughly 17 minutes. Be aware of this if you need to make a connecting flight or your friends are giving you a lift from the airport. This trip has a 2.25-star rating.
What terminal does EI123 fly out of?
Flight number EI123 runs between Dublin Airport and ORD, and travelers on this flight normally depart from Terminal 2.
What kind of plane is on flight number EI123?
Expect to board an Airbus A330 if you're booked on flight EI123. Almost all services from Dublin Airport to O'Hare Airport operate using this type of aircraft.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your EI123 flight with Travelocity, please visit our Customer Service Portal.