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:
- Adria Airways (JP) E, G, K, L, T, U
- Austrian Airlines Group (OS) L, O, T
- Croatia Airlines (OU) E, L, S, T, U, W
- SWISS (LX) E, I, L, P, T, X
- Lufthansa (LH), Air Dolomiti (EN) and LOT Polish Airlines (LO) E, L, T

On intercontinental flights, this applies to the following booking classes:
- LOT Polish Airlines (LO) L, W
- SWISS (LX) I, E, P, T, W, X
- Austrian Airlines (OS) E, K, L, T, O, S, W, U
- Lufthansa (LH), Adria Airways (JP), Air Dolomiti (EN), Austrian Airlines Group (OS) and Croatia Airlines (OU) L, S, W, U