Here is a link to the participating airlines on the Budget site:
https://www.budget.com/budgetWeb/htm...ine/index.html
Here is a link for the Hotel programs
https://www.budget.com/budgetWeb/htm...tel/index.html
Here are some other reward programs
https://www.budget.com/budgetWeb/htm...ies/index.html
Amtrak is also a partner, 50 points for each rental.