Originally Posted by
Hartmann
A ticket can be re-issued with the same ticket number. At least I thought it could. This happens when I up-fare from Y to F. They reissue the ticket but the ticket number stays the same.
I do not believe that is the case. A ticket can certainly be
re-validated by the carrier and the original ticket number is retained. And an ETKT and be
re-synchronized to a PNR. But
re-issuance of a ticket would require a new valid ticket and a void old one. Hence, a new ticket number.
What usually happens when you buy up in response to an offer is an additional collection (labeled "Premium Seating" on your credit card statement) and accommodation in a higher cabin, but no re-issuance of or changes to ticket coupons.