Two of us flying IAH-BOS this week on an early morning flight. Partner is 1K and I’m Silver.

We applied RPUs at booking and at T-96 J has 6 open.

Is it best to split the PNR now to give us best chance of upgrade or could both seats clear upgrade before checkin?

We always split at check-in anyway but don’t want to risk being passed over for upgrade between now and then if space opens up.