Paris to Marseille by road: at least 7 hours
Paris to Marseille by TGV: about 3 hours, can arrive in center of city
Paris to Marseille by plane: 1:15 to 1:30 hours + 1 to 2 hours spent at airports and travel time to and from each airport
High speed rail is more comparable to flying but without the hassle, and it's definitely far faster than a bus.
Paris to Marseille by road: at least 7 hours
Paris to Marseille by TGV: about 3 hours, can arrive in center of city
Paris to Marseille by plane: 1:15 to 1:30 hours + 1 to 2 hours spent at airports and travel time to and from each airport
High speed rail is more comparable to flying but without the hassle, and it's definitely far faster than a bus.