I just found this site and it is great!
Just enter the total budget you have for your hotel and flight, and the dates you want to go. Wherefor will pop up a map showing where you can fly and stay in a hotel for your budget amount.
It’s also a pretty good way to find the price of the flight and the cost of a hotel in each city, because it shows both when you click on the city name on the map.
You can also go to the bottom of the page and specify the city you want to visit.