Devices, systems, and methods for providing remaining seat availability information in a booking class

A computer device is provided for determining remaining seats in a booking class having a maximum number of seats, which communicates with a user's computer device over a network to receive a user query, associated with travel parameters and including an amount of persons and at least two connect points, and obtains a schedule corresponding thereto. The schedule includes a cabin class with booking classes ranked by a criteria between a highest and a lowest booking class, the lowest booking class being a subset of the highest booking class. The computer device selects a least-cost-fare booking class from the ranked booking classes, which has an actual number of available seats at least equal to the amount of persons requesting seats and an applicable fare meeting the travel parameters, and provides an indicia thereof to the user, in direct response to the query. Associated systems and methods are also provided.