I’m typing this from a plane My 11” iPad Pro with keyboard folio has become my primary travel computing device (I still carry my 12” MacBook ‘cause a few things that I might have to do if things go badly wrong at work are still much easier on the slowest Mac than on the fastest iPad.
In flight I usually catch up on email and news. I also use Coda to do some light development work on my dev server back at the office. (I keep a Trello board of little outstanding tasks that are perfect for this kind of scenario) I’m really quite amazed that this can all be done from an airplane these days.
I keep shows and movies and books downloaded too, but rarely watch or read them.
As for actual workflows, I don’t really have anything that’s specific to travelling, but I’ve been looking for a good flight management app.
I also keep a Mophie Powerstation USB-c 3XL with me: It can deliver 45W of power and has enough capacity to make sure that even a long flight or a series of unexpected delays doesn’t leave me in a situation where I have to plug my stuff in to unknown USB ports on planes or in airports.