I have a round trip itinerary ticketed on United CLT>IAD>CDG VCE>MUC>CLT. The outbound is operated by United, the second leg is Air Dolomiti and LH. I'm outbound today and the return home is July 21st.

As I was checking into the flight today, I noticed that the VCE>MUC leg was cancelled. I did not receive an email for this cancellation. I called United and they rebooked me through EWR (on UA metal), but I land 4.5 hours later than I originally did.

Am I owed the €600/person? If so, which airline do I contact? If not, why? TIA