Many IHG hotels offer Bonus Points Packages from 1,000 points all the way to 20,000 points per night. Some regions publish a list of hotels and Bonus Points Packages they offer.
Now, IHG Rewards Club has clarified the number of airline miles collectors earn if they purchase Bonus Points Packages.
You can access IHG Rewards Club terms and conditions here.
Here’s the conversion table:
The general conversion is that you get 20% as miles what you would earn as points.
My general advise would be not to collect airline miles for IHG stays unless there is an airline related promo going on. Otherwise it makes no sense at all.