Originally Posted by
SDQBound
The most generous rule will apply, provided that you are in a single itinerary and with a connection (not a stopover).
Routinely, I get F allowance when at least one upgrade segment clears, no matter in which order.
To be clear. Not just a single itinerary, but a single ticket.
In that case, the ticket is from A-C with a segment in F. Rather than multiple tickets booked into the same PNR/itinerary, where the Y allowance would apply to the Y ticket and F allowance to the F ticket.