The KrisFlyer rewards program offers several levels of membership - the more you fly, the more benefits you earn and the program is free to join. If you fill out your application online at www.singaporeair.com.sg, you can receive your number right away.

You can earn miles with Singapore Airlines, SilkAir and any other program partners, including a number of hotels, car rental agencies, and other companies. Singapore Air is a member of the Star Alliance, so you can earn miles on a number of carriers, including Austrian, Lufthansa, Air Canada, United, US Airways, and others.

Hotel partners include Hilton, W Hotels, Hyatt, Raffles, Marriott, Westin, and many other chains. A complete list can be found at www.singaporeair.com.sg.

Miles can be redeemed for free flights and upgrades on Star Alliance partners.

If you accumulate 25,000 credited flight miles in any class of service in a 12-month period, between 1 April and 31 March each year, you will become a KrisFlyer Elite Silver member. Benefits include a 25% bonus on actual miles flown and priority when waitlisted.

You can reach a Gold member status if you accumulate 50,000 credited flight miles in a 12-month period, between 1 April and 31 March each year. Benefits include increased check-in baggage allowance, priority check-in and boarding, and worldwide lounge access.

To qualify for PPS Club membership, you need to earn 50,000 credited flight miles or 25 flight sectors in First or Raffles Class on Singapore Airlines, or Business Class on SilkAir, within 12 consecutive months.

Many membership benefits are also valid on Star Alliance flights, Virgin Atlantic and SilkAir. For details, see the KrisFlyer section on the airlines' web site.

Sign up online at www.singaporeair.com.sg if you want to receive a membership number right away, or pick up an application next time you fly Singapore Airlines.