Hello All,

I am not very familiar with oneworld and have no status. I am considering flying from Frankfurt to the US on an AA operated flight in cheap coach.

The same AA flight is being sold by BA, IB and AY as a codeshare.

The question is, which codeshare should I book to get the most benefits on this flight? Or should I book directly with an AA flight number? I am thinking about stuff like free/cheaper seat reservations, more baggage and the like. I don't care about earning miles or points with oneworld.

Are some codeshares better than others, or would I get exactly the same benefits on this flight regardless of the airline code on the ticket?

Thanks!