You can park your car for free near the Tennis club of Vernier, via Monnet. Then, I think you can take bus n° 28 or another one to reach the airport in less than 10 minutes.

Thank you Alexandre!

The parking place is next to the Tennis club? I'm asking you this cause   don't know Geneva, I'm here....thanks!

P51 at the airport is quite reasonable and within walking distance to the terminal. Day 1 is 27.-  day 2-4; 12.- per day. When are you traveling?..due to the car show, you may find all the airport garages full at the moment.

http://www.gva.ch/en/Portaldata/1/Resources/fichiers/parkings/acces-parkings-transp_gva.pdf

You cannot use the parking of the tennis club. This is private. But the parkings in the streets around the tennis club are totally free without time limit (look at a street called via Monnet). The bus stops are at rue du Nant d'avril or in the village of Vernier. Check on www.tpg.ch from "via monnet" to "aéroport".

you can park in the residential area between chemin de l'avanchet and chemin de joinville. it's free and at <10 minutes by foot from the airport. if you come during the day there is always some places.

cheers,
pika

If you plan on parking your car after 6pm and before (the time you put the car, not the entire period of parking), or if you want to do it on the weekend, you can park on the street in the white zone around bus stop Ziplo which is for bus 23. Bus 23 does take you to the airport, but since it is the terminus and on the other side of the city, it would take 50 minutes from ziplo to airport.

Hello everyone!

I'd like to say thank you for all the suggestions! It realy helped me!

See you!