Upon arrival at Paris' Orly airport in the early evening, I will be travelling to my accommodations close to Gentilly station and the following morning I will be picking up my rental car near La Croix de Berny station by 9 am.
At the end of my trip after returning my rental car near near La Croix de Berny station I will be returning to my accommodations close to Gentilly station. That same afternoon I will leave my accommodations to visit Notre Dame Cathedral and return.
Then the following morning I will need to travel from Gentilly station to De Gaule airport for my flight home.
That makes a total of six trips in two 24 hour periods. What is the most economical way to pay for these six trips, and how exactly should I go about paying for them?
Thanks.