fifty_two

Ok i found what i needed

advice = next time better to give the route cause normally you choose a route , not flight codes

In your case the problem might come from the OZ flight , as its not skyteam . Sometimes/usually codeshares with airlines from other alliances are more expensive

Also be aware that OTA can have specifc agreements with airlines regardless of the alliance , and they can sometimes be cheaper than airlines , and they can offer crazy journeys with lot of long layovers

are you able to find the same route with same flights at same dates with AF or KL ? if yes , whats the price difference ?

for which reason you want this exact route ? mxp-cdg-icn-nrt-ams-mxp

If price is your only motivation you probably can find cheaper