Capacity at Dublin Airport is to increase from next summer.
The Commission for Aviation Regulation (CAR) says it will have more departures during peak morning hours.
The number of departing passengers in Terminals 1 and 2 will increase from 3,375 and 3,450 to 3,700 in each.
There will also be an increased hourly limit on the number of people arriving into Terminal 1.
A general view of the departures area in Terminal 2 in Dublin Airport | Image: RollingNews.ie
The commission says six parties responded to the proposals.
Cathay Pacific, Dublin Airport, Fedex, Icelandic Air and Lufthansa supported the decision - while Aer Lingus opposed it.
The airline is worried the increases could see delays, and damage Dublin's reputation as a connecting hub.