On average, abouts $8,000 - $12,000 depending entirely on your surgeon of choice.
The vast majority of plastic surgeons utilize(share, rent, and/or own) a private OR and therefor have flexibility in facility cost.
Almost all of them offer the option of having your surgery in an actual hospital, at cost.
Keep in mind that reconstruction and/or set back of the frontal sinus usually cost a bit more than burring. In my experience, I've seen a sliding cost from technique agnostic surgeons such as Dr. Eppley in Indianapolis, IN and Dr.Cardenas in Guadalajara when quoted for Type I, II or III foreheads.
My lowest quotes were from Dr.Nguyen in Lake Oswego, OR; Dr.Mayer in Beverly Hills, CA and highest from Dr.O(retired), and Dr. Spiegel.
Dr.Zukowski (as of last year, anywho):
$6,000 surgeon's fee
$3,500 Facility + Anesthesia fee
--
$9,500 total
I settled on Dr.Z primarily due to being (somewhat) irrationally afraid of having my frontal sinus removed and smushed, in spite of lots n lots of absolutely amazing results from such a technique. Personally, he does neat things with a burr that are aesthetically pleasing and has a smaller scar.
So, blrrrrooop OBJECTIVITY!

In summary, Dr.Z = goldilocks.