Code shares are weird and if you don’t know about them you should look them up - what I’m saying is that code shares don’t get split between two major carriers as far as I know.
So you’ll never have a flight that is both United and Delta ticketed. But you’ll often have a flight that is United and ANA ticketed. Or Delta and ItalAir
Yes they are. Never said otherwise.
Code shares are weird and if you don’t know about them you should look them up - what I’m saying is that code shares don’t get split between two major carriers as far as I know.
So you’ll never have a flight that is both United and Delta ticketed. But you’ll often have a flight that is United and ANA ticketed. Or Delta and ItalAir