The standard rate is US$0.04 per mile (roughly US$40 per 1,000 miles).
Buying KrisFlyer miles directly from Singapore Airlines is generally considered a due to the high cost of US$0.04 per mile . Most travelers instead use credit card transfers or bill payment services to acquire miles at a much lower effective rate. 1. Buying Directly from Singapore Airlines buy krisflyer miles
You must already have at least 50% of the miles required for your intended award flight or upgrade. The standard rate is US$0
This can be done online during the booking process at Singapore Airlines . 2. Strategic Alternatives (Cheaper "Buying") buy krisflyer miles