Would this be possible?
LAX/BUR-PDX-SJC/SFO (stopover) - HKG-CGK?
Ideally, I would like to plan a long layover of around ~20h to go shopping in Portland. From PDX, I prefer to fly to SJC. However, CX flights departs from SFO.
Questions:
Would LAX/BUR-PDX-SJC/SFO be considered backtracking that is not permitted?
Are SJC and SFO considered co-terminals?