I use the all-in-one booking sites too, I feel like they help save money.
Expedia, Travelocity, Priceline, etc.
I priced out flight+hotel, same duration, for next week, and then for July, which is in 6 months. Surprisingly, the flight for July is a LOT more expensive! Why is that?! Both packages are for departure on a Monday and a return on a Friday. Hmmmm...