Originally Posted by
docbert
If one person on the reservation is Platinum or 1K, all will get E+.
All passengers will also get baggage allowed and some other benefits of the highest status passenger.
You can get these benefits even with separate PNRs, though, with a call. The only drawback is that the people on the PNR without the elite will not be able to change their E+ seat assignments themselves - you'll have to call in.