I am in a similar situation- I took advantage of an unadvertised biz-class sale fare out of LAX, but I am in NYC. There was no way to book a connection from NYC without jacking up the fare, so I figured I could just book a NYC-LAX R/T later.

The questions I have are:

1. Is there any language in the fare rules that I should look out for before I notify DL that I want the 2 itineraries linked? I don't want to get penalized for nesting the tickets.

2. This involves international travel out of LAX. By linking the tickets, will I be able to make all the necessary check-ins in NYC, or will I have to go outside security at LAX to check in again?