Originally Posted by
shuly
That's actually happened to me on TK. I had a flight AAA-BBB-CCC booked in K, which allowed changes. I wanted to change the AAA-BBB segment; there was availability in K on the new flight; but there was no longer availability in K on the BBB-CCC segment (which I did NOT want to change!) They couldn't do it.
Shuly
Of course they couldn't.
You keep giving examples that are irrelevant.
Check the t&c of the ticket you bought (any ticket). When you change a paid ticket the booking inventory has to be available. In some cases they have to reprice the whole ticket (these are the rules). That is a common practice which is perfectly fine. You can't expect to change your ticket if the market has changed and is now priced differently.
You keep mixing between PAID and Mileage upgrades.
And just to compare apples to apples in your case would you accept K being available for both segments but TK would just say "Oh this is actually a different K and we cannot rebook you"