Originally Posted by
rapidex
You can also fly IB or BA codeshares for the same result of you just need 4 qualifying flights.
Just so that there's no ambiguity about this: You can also fly IB in the sense of flights that are both marketed and operated by IB; and you can also fly any BA-coded flight operated by someone else. However, an IB code on a flight operated by someone other than BA or IB will not count.