How does one add boarding passes to Apple Wallet?

I have been trying to add some boarding passes to wallet. I have downloaded the airline app and logged in. I have tried to "scan the code" as suggested in wallet, but the only code is a QR code and nothing happens when I try to scan. This should be that difficult but I cannot figure it out. Is there an easy way to get this done? Please explain to me how to do it. Thanks.

If your airline is Delta

Check into your flight with this page of Delta's website on your iPhone/iPod Touch (have your flight's confirmation number ready). When you complete your checkin, you will be given an option to add the pass to your Passbook (aka Wallet app). Tap into that, then press the Add button to add the pass to your wallet. Then you can skip the check-in kiosk at the airport if you have your phone and the pass handy.

Any other airline

Download the airline's app (yep, only Delta lets you use the mobile site to add a boarding pass to Wallet) and open it up. Here are some apps from the major carriers (though don't fret if your airline is not on this list, it's rather incomplete; just search for it in the app store):

• United

• JetBlue

• Alaska

• American Airlines

• RyanAir

Proceed into the app (have your confirmation number or loyalty account info ready) and choose the Check in option (location of this button varies between apps). Follow the instructions to check in, and at the end, you'll see a button to Add to Passbook or Add to Apple Wallet. Press that, then press the Add button in the Navbar and you'll be set.

I have Delta, and had checked in on a computer. I found that when I logged into the Delta app on my iphone, I was able to navigate to my trip and add the boarding pass to my wallet there. Just one other option. Delta used to let me add the boarding pass directly to my wallet when I pulled up the boarding pass notification. Kind of annoying to have that functionality taken away...