Ontario Airport is the closest and easiest! (About a twenty minute drive) John Wayne Airport in Santa Ana is also a good option. (About 1 hour away) The cheapest flights will probably be into LAX. (About 1-2 hours away depending on traffic)
Hotels in the area range from $50/night for a cheap motel up to $200/night for a nice Sheraton. Airbnb options start at $25/night for a single room and about $60/night for an entire private space. For any more questions, give us a call.