Thanks, for the information. The implication (of your statement) is that one should always double-check KVS tool system fare quotes, through other means, whether it is through the airline (web site, reservations agent), travel booking web site, travel agent etc. The KVS tool fare quote may not be the cheapest (published) fare that can be quoted.

The sabre dot.res fare quotes the U fare as $2400. Are you saying that this sabre system has not yet updated the U fare to reflect the current cost of $1600.

The corollary questions are how long does it take for the GDS systems to reflect the current fares of AC (or other airlines); would any KVS tool fare system currently reflect the up-to-date fare?