I wouldn't go as far as putting it in airplane mode. I just turn down the notifications if it bothers me.
Too bad the developers aren't smart enough to put in something like "Night Mode" or something, so you would only get emergency notifications, or calls, or whatever you set.
I actually had that in a Moto G4 Plus that I had before, but someone mugged me and stole my phone. :( Now my "newer" phone (actually got a used one that is older than the one I had before) doesn't have it.