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Upgradeable booking classes include Business class C and D and Economy class Y and B, as well as the additional fare classes listed below:
Air Canada – O class
Air China – J and G class
Air New Zealand – E, U and O class
ANA – J, Z, E, G, M and U class
Austrian – G, E, M and U class
Copa Airlines – M, H, Q, K, V, U, S, O, W, E, L, T and A class
Brussels Airlines – G and E class
Ethiopian Airlines – G and S class
EVA Airways – K class
Lufthansa – J, E, G, M and U class
SAS – S class
Shenzhen Airlines – M and H class
Singapore Airlines – S, Z, J and U class
South African Airways – M class (domestic only)
SWISS – J, M and U class
Turkish Airlines – M, A, H and S class
