Changing return flight at Changi for SFO

[SQfanatic]

So chances are I might be switching the return flight to SFO from SQ16 via ICN to SQ2 via HKG. When landing in Changi at 6am in the morning, and asking the front desk for change of flight, will there be fees involved in changing?

Thanks in advance

[TerryK]

So chances are I might be switching the return flight to SFO from SQ16 via ICN to SQ2 via HKG. When landing in Changi at 6am in the morning, and asking the front desk for change of flight, will there be fees involved in changing?

Thanks in advance

It depends on your fare rules. Cannot tell without your fare basis.

[SQfanatic]

Thanks. I hope we can change it somehow.