Do you know what the potential miles upgrade cost into first from a 'P' business class seat would be? For example if a business saver ticket costs 92000 miles to upgrade into first, is it safe to assume the P class would be the same or more if a purser were to let you upgrade onboard (barring the one upgrade per flight rule). Thank you.
The onboard upgrade would be the same as it would normally be for a Business Saver to F.