Originally Posted by
brunos
... Restrictions on different I fares vary considerably depending on the exact fare bucket used and the origin. In each country there are numerous I fares and coniditions can be quite different...
...I frequently use travel packages exHKG in business class (companion tickets including hotel) and those I fares are totally nonchangeable/nonrefundable. That could be the case here.
I have some additional questions for OP:
* Is SIN a transit point or HKG a transit point? If anyone of them is a transit, will the change make that a stop or an overnight stay?
* Is this a promotion with restrictions on flight numbers?