It’s possible, but only for esoteric/ritual type spells, not modern sorcery.
Personally, I would only try something like that if I had no other option. The air touching your lips would be likely to get either very cold or very hot, enough to cause damage to such delicate skin. And if you couldn’t keep your lips pursed in a good Circle the stability of the “containment” would fluctuate. If you accidentally close your mouth…you’re going to have a bad time.
But you wouldn’t be able to talk, which a lot of esoteric spells require, so the application would be very niche.
With esoteric spells, the energy transfer is kept inside the bounds of the Circle, and most are set up to remove the very excess energy they might leak into the air. With modern sorcery, energy flows through the bounding lines/the array, which in this case would be the flesh itself.