A central computer system for processing user travel requests including an outbound journey and an inbound journey, includes elements for calculating and returning information on travel products to user, including sale prices, the central computer system being accessible from at least one user terminal, and including: A travel solutions search engine that can access at least one travel segment database (FDB) and having elements for determining outbound segments and inbound segments that comply with input criteria; A fare search engine having elements to determine the fare associated with possible travel solutions; A travel products grouping engine that applies grouping criteria which include at least one fare equivalence criterion; Elements for extracting the outbound and inbound segments from each group of travel products; Elements for displaying information on at least one group of travel products on the user terminal, separating the outbound segments and inbound segments.