No, they can't
Originally Posted by georgetg
SkyWest (or any other US airline for they matter) could codeshare with KLM, AF or Alitalia. (I think this is what Bedford erroneously calls "Skyteam code")
Delta is the exclusive provider for this side of the Atlantic JV. AF/KLM and AZ cannot codeshare as you describe.
SkyWest could carry the code of non-JV SkyTeam airlines, but it has to be that individual airline's code. They can't use Delta code in that arrangment, and as such they would be a competitor to Delta in that market.
Under our current scope SkyWest can operate other than permitted aircraft for other air carriers. Under the TA SkyWest's ability to operate larger aircraft for competitors and maintain their DCI relationship is further restricted.