I see no availability from JFK-TLV on Air Berlin with Avios, but I do see JFK-TXL & TXL-TLV. I understand they may be able to check the luggage straight through, and maybe not. But how about excess luggage? If I pay for an additional suitcase, will I pay twice? From what I see, it's about 130eu for a second suitcase in economy. Anyone have any experience with this?