Thank you all for your responses

Thereare actually 2 itineraries - one for me and one for for my wife and son.

They are: IAD-GRU/GIG (stop)-ORD-DEN(stop)-SFO-BKK(stop)-KTM(stop)-BLR(stop)-SIN(stop)-DEL(stop)-MUC-DEN

The other is the same until DEN, then goes-LAX-SIN(stop) and then meets up with mine to finish off

New question from UA is that I must use UA over either Atlantic or Pacific and cannot end in DEN as I had previously stopped there. What would happen if I ticketed on the LH nonstop MUC-DEN-PHX and just did not take the last segment. I live in DEN

Again, thanks for the help