can passboook be used to store boarding passes for any airline or just the ones in the app store?

Hi there moodytoday,

I understand that you have a question about using the Passbook app. I have the following article for you that will help provide some information about this topic:

If you don't see the option to add a card, ticket, or other service to Passbook, contact the merchant to make sure that they support Passbook passes.

Use Passbook in iOS - Apple Support

https://support.apple.com/en-us/HT204003

Thanks for being a part of the Apple Support Communities!