I hold A-List and a Companion Pass and my wife also has a Companion pass (no A-List). My named companion is Child #1 and my wife's named companion is Child #2. As of my December 2020 trip and subsequent trips in 2021, my companion (Child #1) will get A-List boarding with me even though it is a separate reservation # and will be 1 number behind my boarding. My wife will also get A-List boarding with me only if I book her ticket with mine (same reservation number), she'll be 2 boarding numbers behind me and her companion (Child #2) will be 3 boarding numbers behind me. So for my last trip in July 2021, we had 3 reservation numbers (1 for myself and wife, 1 for child #1, 1 for child #2) and we were all automatically checked in with A-List boarding and got A22-25. And for a trip in June 2021 we were A17-20. However if my wife and I are on separate reservation # (i.e. I booked mine on points and hers with $, etc), A-List wouldn't apply to her or Child #2 and they would both have to check in manually and separately. When I didn't have A-List previously, my named companion/child #1 would have to check in separately and boarding number would be dependent on how quickly you could check both in and it was usually a few numbers away. Not an issue as we would all just board with family boarding most of the time as we would get B boarding group.
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