Urgent Question about concurrent job interviews

I have two job interviews with two companies in Bay area (I am in Vancouver, Canada), and it happens that one is on Thursday and the second is on Friday. Both companies are going to book me one-day round-trip tickets. Should I ask the second company to trade the round-trip ticket with a single trip(return) ticket and a night of stay of a hotel? Does it hurts something if I tell the second company that I have another interview at the same time?

Thank you for your quick reply, I need to reply the second company soon.