Once the underside is golden, you should use a rubber spatula to lift an edge of the crepe. You can use the spatula to flip it, but I find it easier to use my fingers. Crepes are more delicate and thinner than pancakes, so I wouldn’t flip them in the air because they rarely land flat and then you’ll have just seconds to straighten it out in the pan. It will probably break if you flip it in the air too.