How mobile-friendly is Volaris?
Volaris provides an iOS app that is compatible with iPhone, iPod, and iPad.
For Volaris VClub members, you'll be able to manage your account from the app, though using their website will no doubt provide more functionality
Volaris has an Android app that works with most Android tablets, phones, and some Android Wear devices. You can get the same stuff done on the Android app as you can on the iOS app for Volaris.
Also take a look at Volaris's website by clicking here — you should be able to do what you need there.