Generally, for a better deal at Thiruvananthapuram Airport it’s recommended to book in a timely manner (to save up to 72%). Cheapflights recommends you book around 30 days prior to your pickup date. Booking as early as you can also increases the likelihood that you’ll get the ideal car.
Typically, how long you can hire a car for depends on the inventory of the supplier. For Thiruvananthapuram Airport however, it is certainly possible to rent a car for an entire month.