Originally Posted by
Dr. HFH
This has some interesting possibilities. When xONEx tickets are reticketed, they get new ticket numbers. It's likely that the previous number will appear in the "Issued in exchange for" field (box on paper tix). Then the question is whether the system is set up to catch and track this, linking the tickets for this purpose.
A reissue (or an exchange) always gives a new ticket number. (And in the case of conjunction tickets, that applies for each of the tickets in the ticket booklet.)
If the change only requires a revalidation, the ticket number will stay the same. Only the carrier prefix, flight number, date and booking code can be changed by a revalidation. (And the flight carrier prefix can only be changed by an airline not by a travel agent; a TA would have to reissue or exchange the ticket.)
Any other change requires a reissue or an exchange.
If there is any fee, refund, or price change to collect then the ticket will be reissued.
However the previous ticket number(s) are referenced on the new ticket.
This is general to any kind of airline ticket.