It is doubling its capacity with the introduction of a 95-seat aircraft, which will be based at Shannon.
Cityjet is also bringing forward its morning departure times from 9am to 6.30am to increase business connectivity at Charles de Gaulle airport.
They Cityjet service from Shannon to Paris began last February in the aftermath of the withdrawal of the Aer Lingus service to Heathrow - a service that is now being resumed in April.
Welcoming the announcement, Shannon Airport Director Martin Moroney said doubling the capacity and the early morning departure is a huge boost not just to Shannon but to the entire west of Ireland and he called on the business market to support it.
