Originally Posted by
xliioper
No. For the same reason AF/KL can't sell you codeshares on purely DL domestic flights. It's not allowed legally and they don't have the fare filings on which they could sell the codeshare flights. When you purchase a fare between US and EU, it is not priced hop-by-hop, they are using fare filings that apply to entire trip between origin and destination.
You can buy B6 domestic on TK ticket stock or at least it was possible last month