What are some of the common SQ flights that help me earn more miles? And does that mean I will have to keep checking with Singapore Airlines before booking my flights?

Depends on the fare class

u dont need to keep checking, it'd be indicated in the fare class T&Cs before u book

Hi anon,

While not so common in Singapore, SQ does have occasional promotions which award bonus KF miles on the flights flown.

For example, they recently ran one for KF members in Thailand:

https://www.singaporeair.com/en_UK/th/plan-trav...

If one does happen for you in Singapore (assuming you are based here), then you will probably want to keep a copy of the promo T&Cs and check the crediting after you have flown the relevant flight. Any disputes can then be raised with them, especially if you have proof of the promotion T&Cs.