MV Falcon + Divine Wind of Mist Valley

Can I return Falcon as a cost for its attack and activating Divine Wind eff to special summon another wind monster?

It would be nice a +1 free

You mean attack with Mist Valley Falcon and return itself ?
Then no, you may not return Mist Valley Falcon itself with its own effect

If on the other hand, you're referring to another Mist Valley Falcon, then sure, you can obviously return that Mist Valley Falcon