Originally Posted by
MSPeconomist
There's no MPM rule like RTW revenue tickets have?
No. Rules are completely different.
My upcoming trip exceeds the MPM of the highest paid RTW (38,000 miles) and I found this out the hard way. When calculating the price of my infant ticket, they couldn't use the paid RTW fare because of this. As a result, I had to pay 10% of of the one-way J fare in each market... just under $2,000!