I am looking at flights to PVG from PEK for late May. There is a CA flight that arrives at 10:30 a.m. and my flight on SK departs at 13:40. Is this enough time for a connection, considering I am making a domestic to international change?

Unfortunately the earlier flight that a.m. is almost 3x the cost

Also, are CA flights normally ontime or are they delay prone?

Merci.