Originally Posted by
CaliforniaSteve
Since SQ doesn't fly Ho Chi Minh to Hong Kong, where you would connect with SQ2, you would have to fly Maldives-Ho Ch Minh- Singapore-SFO. I think that would be backtracking as you'd be flying east from Maldives to Ho Chi Minh, then west back to Singapore, then east again to SFO.
Depending on overall distance traveled, east-west-east *might* not be considered backtracking (likely would) However, flying back on the same route on the same one way journey (SIN-SGN-SIN) most certainly is.