Unlike with Star and oneworld, SkyTeam elite customers have not had access to lounges on domestic flights so far when flying with partner airlines.
This will largely change on April 01, as the main lounges will then also open to partner members.
Two important exceptions remain, however.
The first concerns airport lounges that are not operated by the airlines themselves. Here, it will more or less remain a matter of luck whether one will be let in or not – which will mainly depend on the knowledge of the people at the reception.
Not surprisingly, the second exception, the Delta Lounges, also remains. Here, you will still only be admitted if you have an international connecting flight with a SkyTeam airline, before or after the relevant domestic flight.