We planned a visit to the Palace of Versailles before our flight out to Rome. Versailles was a 40minutes metro ride away from our accommodation and the tickets could be purchased online, costing us 36euros for 2.
Our flight to Rome Ciampino airport was on Ryanair at 920pm at night taking off from the Paris Beauvais airport. There was a shuttle service that takes passenger from Porte Maillot to the airport so we took the metro there from our accommodation. We took a while to find the pick up location but managed to do so eventually. The ride to the airport was about an 1hr 15mins.