I am planning to travel to either DFW, SFO, LAX, or ORD from AUH on EY in paid (not award) business class in late Feb. I plan to overnight in the arrival city and fly the next day on a separate ticket to SEA or COS and then have several other flights included in this separate ticket on other dates.

Have I allowed for enough cushion should there be a delay with the EY flight?

I could possibly purchase 2 separate tickets (one ticket to SEA or COS and another ticket with my other flights) so that only the first flight would be at risk but do I really have to go that far? Obviously, if the cost is the same it really doesn't matter if I have one ticket or two for the US domestic flights? I'm just concerned about weather in the US that time of year and whether I have factored in enough cushion between the arrival of the the flight from AUH and the first of my domestic flights. I am a seasoned traveler but no longer have status of any measure with US airlines (FO with DL is pretty much nothing). And buying a ticket from AUH to SEA with EY is outrageously expensive, hence the purchase of a separate domestic ticket.