Originally Posted by
hfly
CSA did service Colombo and may do so again in the future, that's probably why the fare exists. In any case many carriers have suspended service in recent months.
They don't have to service CMB. As long as they publish a fare to/from CMB, on any of their partners, even if it's a non ST partner. Bokk the first leg to the nearest city that is served by an ST partner, such as KUL, SIN or DPS or BKK. You will not get mileage for that leg, it's still not a bad proposition.