Miles & More (Lufthansa, Austrian, Swiss, and other partners) - Fare class question - weflyhome.com

I'm looking to book a B/Y economy class round-trip ticket on Lufthansa that I can upgrade using my United (Star Alliance miles) to business class. The reservation tool on weflyhome.com displays fares in the following categories: FunFare, SaverFare, ValueFare, FlexiFare. Does anyone know which fare classes fall under what and which particular one do I need to book that will be valid for a miles upgrade?

I'm flying from EWR to BLR via FRA.

Thanks in advance.

I'm looking to book a B/Y economy class round-trip ticket on Lufthansa that I can upgrade using my United (Star Alliance miles) to business class. The reservation tool on weflyhome.com displays fares in the following categories: FunFare, SaverFare, ValueFare, FlexiFare. Does anyone know which fare classes fall under what and which particular one do I need to book that will be valid for a miles upgrade?

I'm flying from EWR to BLR via FRA.

Thanks in advance.

It should be flexi fare.

But oyu can cklick on fare conditions under the total price and read the conditions. As soon as it is refundable it is B/Y