I'm taking myself and 3 others to Europe next summer and would like to book our tickets this week as the dates are finally available. All of the seats are in delta one and all using miles, if that matters. I can book 3 of them with my delta account, and we're going to use my dad's account to book the 4th rather than pay the transfer or gift fee to transfer the miles (he's one of the travelers). Is there a way to do this that shows our party as traveling together so we're not split up with flight changes? If no, I'd just book myself on the single ticket, but if I can avoid it, that's great.

If there's a better way to go about the booking altogether, I'm all ears!!

Thank you for the help!