You can try these tips:
# Force Restart Your Samsung Phone
# Enable Safe Mode
# Check Update For Your Android OS
# Reset Network Settings
# Stop Apps From Changing System Settings
# Wipe Cache Partition
# Perform A Factory Reset
# Contact Samsung Support
I hope any one of the above-mentioned solutions will definitely help you.
Above solutions is refered from here - [link|https://www.recoverandroid-data.com/fix-samsung-phone-stuck-in-airplane-mode|Samsung Phone Stuck on Airplane Mode? Here Is The Real Fix!|new_window=true]
You can find the detailed steps there.