Air Berlin operated by Alitalia?
My friend is flying TXL-LIN and booked the ticket through Air Berlin. However, the plane he got on is an Alitalia plane. Nothing on his booking says anything about Alitalia. And even on Alitalia's website, it says this flight is operated by Air Berlin. Are they sharing planes? Is this a wet lease or something? Or is it just a typical codeshare that my friend (and I) have missed. It is AB 8738. And it's quite surprising to me. Will he be able to collect Avios on this flight?
Apologies if this is a basic question, but I couldn't find any info, and while I have flown many codeshares, the booking tends to indicate the operating carrier somewhere. He even checked in on the Air Berlin app for an Air Berlin mobile boarding pass. I mean, it isn't upsetting or anything, just not something I have encountered before and I thought that somebody here would know what it is. Thanks so much :-)