The average bus ticket from Nantes to Paris costs around $23 for departures 16 days prior.
Over the last 89 days, ticket prices from Nantes to Paris vary and during peak season, ticket prices are around $87 while at other times, you can expect to pay around $21.
Usually Flixbus will charge you higher prices for tickets closer to the departure date. To find the best prices, you should be flexible on your date of travel.
To save money and be sure you have the best seat, it's a good idea to buy your bus tickets from Nantes to Paris, as early as possible. The best time to find and book cheap bus tickets is to book at least 16 days in advance.
If we look at the other days, booking between 30 days and 60 days before the departure will allow you to save $1.