If all options are exercised, the deal could amount to more than $7 billion for Chicago-based Boeing, although such agreements usually involve steep discounts.
The Singapore flag carrier disclosed the orders and options Wednesday in a statement to the island nation's stock exchange.
Airline officials plan to use the extended-range twinjets on medium and long-haul routes. They say the planes will enable Singapore Airlines to expand its combined passenger and cargo capacity by four to six percent a year.
Viewers with disabilities can get assistance accessing this station's FCC Public Inspection File by contacting the station with the information listed below. Questions or concerns relating to the accessibility of the FCC's online public file system should be directed to the FCC at 888-225-5322, 888-835-5322 (TTY), or email@example.com.