The itinerary outlines a 13-day trip across northern India starting in Chennai and ending back in Chennai. The trip involves train travel from Chennai to Delhi on day 1, followed by visits to various cities such as Shimla, Agra, Jaipur, Udaipur, Jodhpur, and Amritsar over the subsequent days, with travel between the cities. Sightseeing is planned for the days spent in each city.