Originally Posted by
OPebble
IMHO it is because the IB computer systems are cr*p and are almost impossible to use. Prime example is if you want a seat reservation on an IB flight before check in you have to go to the Finnair site to make it!
Very true, although even then the seat isn't guaranteed.
The ba.com booking system pretty much does not talk to the Iberia.com booking system, hence 2 different PNRs being generated when you are flying BA metal then Iberia metal.
Only recently have the BA checkin been able to print a boarding pass for the Iberia leg, something that was very annoying flying an LCY-MAD-XXX route because most of the time it is impossible to checkin for the Iberia domestic leg, and you end up in Barajas T4S, airside with no check-in or ticket, but your baggage checked through to your destination!
The other annoyance (and deeply ironic considering the OP wants a J-J ticket) is LCY-MAD-XXX which will only book in J on BA.com but will happily book discounted economy on Iberia.com. Then BA claim that you have earnt Iberia miles because you were on a Codeshare and not a BA ticketed plane (bearing in mind they would not sell the ticket in the first place). Totally and utterly ridiculous.
Don't get me started on everything not being a code-share, it seems to have got far worse since the IAG merger.