Originally Posted by
cgtechuk
Agreed but surely if this ticket was purchased say during a sale then that fare expired so today;s price is a new fare rule then surely historical pricing would only work after first leg flown as the original fare filing may not be valid any more?
If you make a change before departure, you don't change the first fare component and all changes are to subsequent fare components, then BA's typical fare rules provide that historical fares can be used if they result in a lower fare than using current prices. That means that the sale fares in force on the previous ticket issue date can still be used.