A premise of this design, is the Wings is equivalent in power to a cantrip. I stand by this, but I suspect this means I am underestimating the value of certain cantrips.
Specifically, the cantrips that Wings compares to, namely Guidance, Eldritch Blast, and Minor Illusion are probably more like the worth of a half-feat, rather than a souped-up cantrip.
Eldritch Blast is by far the best weapon possible. It does heavy 1d10 damage, is the Force damage type that virtually no creature can resist, and is a remarkable ranged attack upto 120 feet.
Most optimizers like Eldritch Blast, but personally I prefer Minor Illusion above it. And the consensus is, Guidance is more powerful than both, especially because a flat bonus to Ability Checks is scarce, and this is at-will albeit requires Concentration.
Consider a hypothetical cantrip that granted a Climb Speed. It would compare to powerful cantrips like Mind Sliver, Vicious Mockery, and Frost Bite. It feels like a tough choice between a Climb Speed and one of these cantrips.
Yet, Fly Speed is strictly better than a Climb Speed. To be fair, the Wings cantrip burns Actions, rather than Moves, so the cost is pricey to use Wings. But I still feel Wings compares to the best three cantrips.