Just as the title, natural regeneration most quickly drains hunger, but wing-flying is the second.

There's no config options to change hunger drain per tick when flying.

It should may only a little faster than vanilla running/spriting, but not as fast as current "wings" version.

wings-1.1.6-1.12.2

Thanks for reporting!

The intention is you eat frequently while flying to keep hunger up. If this is not desired there is in fact a config for it. Inside of config\wings\items.cfg the "flyingExertion" and "landingExertion" can be set to 0 to disable or just decreased.

Found and worked, thanks!
At first I thought "flyingExertion" was meant to change wings' durability cost and not player's hunger cost.(:з)∠)
Anyway, have a nice day!