Welcome to Apple Support Communities. I understand that you're having trouble with Safari loading webpages on your iPad Air. I know it's important for webpages to load efficiently; I'm happy to help. First I'd recommend checking the Wi-Fi network that you're connected to and, if possible, test to see if the same behavior occurs using a different network. I suggest this because the time it takes for a website to load partially depends on the speed of the internet connection being used.
If the issue persists on a different network, check that your iPad software is up-to-date. If you need to update, use this guide to create a backup and update your iPad: Update your iPhone, iPad, or iPod touch