Searching within inbox folder excluding subfolders

I am trying to find all my airline itineraries in my regular default inbox. I created new folder called airline miles. I thought it was a folder onto it self. That is a main folder, not a sub folder of the inbox folder. I just want to search the default inbox only, not other folders I have created. Once I find all the itineraries I am moving them to my airline miles folder. However when I search it seems to search all folders. So I will get the itinerary emails I already found and moved to the airline miles folder. So how do you search one specific folder? I did find a search x folder, but it seems to still find the email itineraries I already found. How do I do what I want?