I have a one way 3 segment flight booked through Delta in a couple weeks.

RNO-LAX (horizon), LAX-DTW, DTW-BOS (both NWA). My travel plans have changed and I no longer have any reason to be in Reno. Do you think if I miss the Horizon flight that the Delta/NWA flights will automaticaly be cancelled ? I dont know how connected the Alaska/Horizon system is to the Delta/NWA system. I can book a flight back to Reno if i have to, but its pricey, and it wouldn be a lot easier and cheaper just to fly from LAX.

Thanks,
Ryan