Direct and 54 minutes quicker than the Tram T7, then Métro 7, for €9.40 more.
Métro 14
M14 · RATP, on an Île-de-France Mobilités ticketPickup, hours & luggage
Boards at. Any Métro 14 station in Paris, boarding a train signed "Aéroport d'Orly"
The Ticket Paris Région <> Aéroports costs EUR 14.00 full fare, EUR 7.00 reduced for children 4 to 9; under 4 travel free. It's the only ticket that opens the gates at Aéroport d'Orly station — the ordinary EUR 2.55 ticket does not work there. It's valid for two hours of métro and RER connections, covering a change at Châtelet or Gare de Lyon.
Luggage. A métro line: no racks, and the trains are full at rush hour.