Miles are earned and redeemed on Singapore Airlines own services as well as with Krisflyer partners. Partners include all Star Alliance members, SilkAir, Virgin Atlantic Virgin Australia, and numerous hotel chains and car-hire companies. KrisFlyer is divided into KrisFlyer, KrisFlyer Elite Silver and KrisFlyer Elite Gold, which correspond to Star Alliance Silver and Gold, respectively.

Elite Silver and Elite Gold status is given to passengers who have accrued 25,000 and 50,000 miles (80,000 km), respectively, within a 12-month period. The 12-month period is predefined according to when a passenger initially applied for KrisFlyer membership, so travelling 25,000 miles (40,000 km) over a 12-month period may not qualify for Silver status unless it corresponds with the 12-month period assigned to them by Singapore Airlines.

Singapore Airlines celebrated the nation's Golden Jubilee with its Airbus A380 in SG50 livery
By Masakatsu Ukon – Singapore Airlines, Airbus A380-800 9V-SKI ’50th anniversary of Singapore’ NRT, CC BY-SA 2.0, Airbus A380

Singapore Airlines flights in booking class G (group and promotional fares) and SilkAir flights in booking classes W and L earn no miles, while Singapore Airlines flights in booking classes V, Q, N and T (promotional fares) will receive between 10% to 50% of mileage.

Priority Passenger Service (PPS) is for passengers who have accumulated S$25,000 worth of PPS Value within a year. PPS Value is acquired while flying Singapore Airlines Suites, First Class or Business Class on Singapore Airlines, or Business Class on SilkAir. The PPS is divided into the PPS Club, Solitaire PPS Club and the Solitaire PPS Club Life.

A member with PPS Club status will qualify for Solitaire PPS Club by accumulating PPS Value of S$250,000 within five years. The Solitaire Life PPS Club status was formerly given to members who accrued a total of 1,875,000 miles (3,018,000 km) or 1,000 PPS sectors. Benefits are equal to Solitaire PPS Club members but did not have a re-qualification criteria. Singapore Airlines has since ceased accepting new Solitaire Life PPS Club members.

All PPS members have priority check-in, baggage handling, guaranteed Economy Class seats when wait-listed on Business and First Class and have access to the business-class section of the Silver Kris Lounge. Solitaire PPS members and their spouses also access First Class check-in and the First Class sections of Silver Kris Lounge.