On March 13, the opening day of reservations for the months of July and August, more than 1.5 million tickets had been sold on the SNCF website. Early reservations make it possible to anticipate the very high traffic on the main lines of the network, but also to benefit from the lowest possible prices.
Anticipating your reservations several months in advance no longer allows you to escape the surge in SNCf train prices. The more a train fills up, the more expensive the tickets are.