Originally Posted by lallyr

Yeah you can ticket mostly all code share fares under one PNR. If there is a not a code share then its still possible. I ticket 9W/BA fares quite often and there is no code share agreement between them and its always under one PNR/eticket number.

You can get mostly all point to point fares under one PNR. Say if there is a YY fare from DEL to NYC and that allows multiple carriers then you can fly any carrier between these two cities who participate in the YY scheme and ticket under one eticket. I have managed to get 7 different carriers on one ticket a couple of years ago. All under one PNR and from 3 different alliances.