Originally Posted by
italdesign
Not exactly, but here are some recent data points.
- JX->BR connection, JX at LAX checked bag all the way thru. Ask CI if they have interline agreement with BR to check bag thru to final dest.
- Personal experience (Nov 2023): USA-TPE, TPE-Asia connection with JX (arriving T2, connecting to T1) does not require transit security, so you're airside the whole time. I assume same is true for any such connection regardless of operating airlines. Of course, you need to have connecting ticket; I'm unsure if there's airside transfer counter to get the ticket.
I have been at an airside transfer counter to issue tickets for BR. Not sure about CI as never flew them. I can check with them later this month in about 10 days time.