John Kirby issued a statement recently, in part:
“It is simply not clear to us that there is a substantive rationale for it. We will continue to consult with Poland and our other NATO allies about this issue and the difficult logistical challenges it presents, but we do not believe Poland’s proposal is a tenable one.”
https://twitter.com/pentagonpressec/status/1501336445729968129?s=21
US: Dear Poland,
Thanks, but…no thanks
US will still press Poland to let their territory be used by US war planners
Any NFZ over western Ukraine needs positioning close to the border
I deduce this by US announcement of sending Patriot missiles to Poland to deter attacks on their bases by Iskander and Kaliber missiles from Russia
NATO does not have to defend a member who unilaterally engages in a war tho’ US lawyers will make every argument that Poland is defending itself from aggression by sending aircraft into Ukraine, regardless of who is piloting them