Originally Posted by
NewbieRunner
Silent? Check
this page (4.3.1).
Upgrades with LH, JP, EN, OS, OU, LO and LX are not possible for some particularly favourable offers.
On European flights, this applies to the following booking classes with:
SWISS (LX) E, L, K
On intercontinental flights, this applies to the following booking classes with:
SWISS (LX) E, K, L, T
Yes, silent. The section you are referring to is on upgrading with miles. It may well be that the rules are the same for upgrading with an evoucher (are they??) but the text does not mention evouchers in any way. Thank you for your comment anyway.