score:4
Not directly but can search to Everywhere on Skyscanner or Anywhere on Adioso. On Skyscanner the results will be sorted by price. So if you just ignore anything after your intended price, this will be the list of most flights below the price.
Upvote:0
Skyscanner is a very good web/app, that allows you to search with
1) your origin >> gives all cheapest destinations sorted by lowest price with different time ranges
2) your origin and time >> gives all cheapest destinations sorted by lowest price