Does anyone have conclusive answer how long between Chase CC application is a good idea. I've seen between 30 days - 6 month. I currently have 5 chase cards (some longer than 5 years old). I recently applied for CO World MC, and it's almost 6weeks. Now, i've decided to do some Mileage Runs, and calculated that paying $375 for PP World MC would be a good idea. This is not purpose for churning, since I've never had any CO cards before the last World MC app.