Originally Posted by
njxbean
How So?
Some examples:
- if your party is a family with children, having minor children on their own PNR may cause system issues around unaccompanied minors, and clearing upgrades independently may actually not be desired
- if you are relying on elite benefits like the expanded baggage allowance, it is more challenging to keep the extra allowance applied to companion with a split PNR
- this is often completely impossible if relying on *G benefits for partner segments; e.g. NZ will assign good seats to *G pax but not to off-PNR companions
- you are much more likely to get separated in IRROPS if you are on separate PNRs as the system will not keep you together during an auto-rebook
On the other hand, if everyone in your party is a nimble, able adult with some knowledge of frequent flying, most of these things are minor inconveniences at worst and the increased upgrade odds are probably worth it. YMMV.