Indian passport holder travel to Dublin via USA

I hold valid Irish student visa and B1/B2 Visa. I will be taking up PG at Dublin, Ireland from January. I am planning to take a short trip at USA before I get in to my PG.

Is it ok to travel to USA (for 15 days) from India first and then move to Dublin from USA? Will there be any issue as I only have one way tickets in both the travel?