Fishing for ideas…
I need to fly LHR-BOS on the 31st March.
This quarter I’ve been directing my flights to SkyTeam as I already have enough TP (640) in my BA ‘short year’ to maintain Silver.

Come 1st April, I plan to revert to BA for the new earning year.

Is there any way I can have a OneWorld flight on the 31st March that will not post TP until on/ after 1st April?

I was thinking of booking a FinnAir or Iberia, and hoping the delay in points posting would put them into the next full year…