Itineraries that show up on Orbitz but not Delta.com
I'm working with a travel agent but doing a lot of my own research to make recommendations about flights. I'm looking to book a trip 9/15 BUD-RDU (incoming segment is RDU-PRG on 9/4). On Orbitz I find a schedule with one stop. DL 8454, DL231. On Delta.com I can only find one schedule with two stops: DL 8748, DL 211, DL 4183
Does the schedule I find on Orbitz not actually exist? Confused why I get such different search results.