I will arrive to Paris on 20.10.2018 od CDG Airport. Will in Paris till Friday 26.10.2018.
During this time will move between T3a line station Balard and Parc de Expozition. During day will have only two ways.
My question is which ticket I should buy for transfer from aiport to Balard on 20.10. and back way on 26.10.2018 and which ticket I should buy for transfers Balard - Parc de expozition in the morning and back way in the evening. This way will be done for 5 days.
Looking forward to you soon reply with help.