For those who don’t have a Singapore Krisflyer account, sign up by March 31, 2018, and enter promo code JOINKFSQ to receive 1,000 bonus miles just for signing up. The miles be will be credited as soon as your account is created.
Singapore Airlines is a member of Star Alliance (which includes United Airlines and Lufthansa) and is a transfer partner of all major credit card rewards currencies in the US.
