I have had my Standard 3 since Christmas 2015 I have flown a lot of hours. But I parked it for about a 2 months and now when I went to fly it states no internet connection.
You might look under the P3S section. The P3P and P3A don't have Wifi. Did you remember to add your device to the wireless network on your bird? Barney
But anyway - P3S does not need Internet to fly as you well know .. it's just a 'quirk' of your phone / tablet telling you your WiFi connection to controller has no internet connection ... Ignore it.
My Bad. I thought he was saying he couldn't get his Wifi to work. I won't connect mine to the internet when flying. I run an older app and firmware. This prevents it from telling me I'm out of date.