gva - Geneva Train Station to Geneva Airport (Air France Departures)

My husband and I are traveling on Dec 26 from Gstaad to Geneva via Swiss Rail. We get in at 1:39pm at the Geneva Train station. From there we will rush to the Geneva Airport to check luggage, get through security and try to catch a 3:05pm Air France flight to Paris. This gives us approx 1 hour 20 minutes. Is this enough time? If not, we can take a later flight, at 4pm. We have not booked our airline tickets yet. Your advice is appreciated as we do not know the layout of the train station and airport....Read more