Delta – We might be a bit biased because we are loyal flyers with Delta, as it’s the largest airline in Charleston, but their app has a lot packed into it without being too difficult to use. We especially love the luggage tracking updates, which have saved the day for us a few times. One example: on a connecting flight, one of our bags was accidentally sent to baggage claim. Thankfully, we had a long layover and received the notification about the bag via the app, so we were able to retrieve the bag and recheck it to our destination.