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In the past, airport security has allowed items like iPads, tablets, and Kindles to go through security while still in a bag. However, now you have to take them out separately to be scanned. It's best to have your iPad out while you're standing in line so you're ready.  You'll need to place it in a scanning bin with nothing on top of it or below it. Look for signs that indicate whether your iPad needs to be removed from its case when you go through security. You can easily purchase a cellular data plan from the country you're visiting, as long as you have an Apple Sim. Under "Cellular Data," choose "Set Up Cellular Data." Pick a carrier and set up an account with them right from your iPad while using wifi.  If you don't have an Apple Sim, visit a local carrier store to buy a carrier sim in the country you're visiting. You can also purchase an Apple Sim before leaving home. This step probably won't help you if you're only in another country for a few days. However, if you're there a week or longer, it may be a good idea. Make sure you have one of these apps downloaded before you go, such as Skype or Facebook Messenger. Although you will need a good internet connection in order to make your calls, you can save a lot of money by using these apps, particularly if you don't have an international plan for calling. Make sure you connect to wifi before trying to use one of these apps. If your iPad is constantly searching for a wifi network, you'll drain the battery. You'll extend your battery's life just by switching off the wifi. To switch it off, swipe up from the bottom of the screen. Hit the button that has the wifi symbol, which is 3 expanding curves.
Have your iPad out while waiting in the security line at the airport. Find a cellular plan in another country with Apple Sim. Speak with friends and family through internet calling apps. Shut off wifi when you don't need it.