The new flights are part of a big expansion in its network and fleet.
"The most significant addition will be the launch of thrice-weekly services to Guangzhou scheduled for January 28, the fourth city in China to be served by SriLankan," the airline said.
This would take the route network of Sri Lanka's national carrier to 50 destinations in 31 countries.
In Europe, SriLankan will add its 13th weekly flight to London, with effect from December 15, flying twice daily on all days except Friday.
In Southeast Asia, both Singapore and Kuala Lumpur will have an added flight for a total of 11 flights each from December 01.
The Middle East will see significant changes throughout the region including the services to Bahrain, Muscat and Doha, the statement said.
Karachi will also have an added frequency, bringi