Rotanes:
This is how I initially thought it would be, but in 2 separate conversations with Delta agents I was told they will not be able to check our bags through to Sofia because the flight is operated by Eurowings and their LH baggage agreement is not applicable. One of those Delta agents even said she checked with a supervisor who confirmed. So, we are forced to deal with claiming our bags and checking them again at the LH desk. This is not going to be a smooth/normal transfer. Has anyone had a similar experience?