I just bought a Samsung Tab A from COSTCO ($129.00). It is WiFi only and the screen is bright enough that I can see the display even though I have top glass in my Avid Flyer.
But wait...
It even has an outdoor screen mode. You go to display and touch the outdoor display and the brightness jumps up a LOT. However, that will use up battery quicker. I haven't had to use this function, but many might want it if they are running the tablet from aircraft power.