there is a separate customs area at CRQ, which is why California Air was going to be able to run their service from there; however a separate user fee would apply for that.
There aren’t any customs operations at SNA at all, so like at KSBD, which also has no customs operations there, all that would be required is for customs to be there to greet the aircraft prior to deplaning for them to do their inspections. Since the closest customs operations to SNA is at LGB, the customs team would have to make the drive down to greet the aircraft.
Yes, it would be easier to base customs at SNA and turn it into an international airport, but that would make the LA basin have 7 bases alone (ONT, BUR, SMO, LAX, LGB, CRQ, SAN), with those at BUR, LGB and ONT having to make the drive out to SNA, SBD and VNY to perform inspections there. That’s a lot of customs.
Also, having it stop at SAN would then continue for another 10 minutes to SNA would seem a bit overkill, no?
I don’t know if there are any airports in Mexico where you can pre-clear on flights to the USA. Don’t have time right now to research it, either, right now.
I don’t think they do either, but that was the only thing I could think of before seeing the above mentioned special gate and baggage area for cleared baggage. I was thinking that if it worked for Canada, it could work for Mexico as well.