Currently there are direct flights from Ibiza to France:

Ibiza to Lyon
Ibiza to Paris Charles de Gaulle
Ibiza to Paris Orly
Ibiza to Bordeaux
Ibiza to Toulouse
Ibiza to Nantes
Ibiza to Nice
Ibiza to Marseille

Flights from Ibiza to France with one stopover.

Flights via Barcelona (BCN)
From Ibiza (IBZ) with Vueling Airlines
OR
From Ibiza (IBZ) with Iberia Airlines
Transfer at Barcelona (BCN) Then on to Rennes (RNS) with Vueling Airlines
OR
Then on to Rennes (RNS) with Iberia Airlines