什麼是Y-CABIN?

In economy class air ticket, there are many types of economy class ticket, the different is based on air fare and terms & conditions. For Y-cabin (Y class), it is the normal economy class (with the highest fare and the most flexible terms & conditions in ECONOMY CLASS)

You may see there are many special fare in air reservation, i.e. $1000 for roundtrip between HK and SINGAPORE. this is not Y class fare, if you chhose Y fare, may be HK$5000 or higher...

To conclude, the "alpherbet" is to indicate the fare and T&C.