There are remaining MiG operators in Central and Eastern Europe. These planes have been converted to use NATO armament and they're being phased out anyway. Ukrainian pilots are already accustomed to using them. The EU could use resilience funds to buy F16, F35 or Saab Gripens for the former MiG operators. Some of these are already F16 or Saab Gripen operators.
Ukraine has no access to the air at this point anyways. I don't see this as plausible. No airports are secured, and Russia dominates the airspace right now. Even if NATO sends planes, how will they be transported there? And how will they establish a base of operations?
Depending on the model of Mig, they could operate from a hastily constructed dirt air strip. US-made fighters not so much. Not sure about Gripens.
I can't speak to the state of Russian air superiority at the moment, it could be that there are gaps/The Ukrainian air force hasn't been destroyed yet.
But even if as an idea it doesn't work out, the fact that the "peace project" organization, whose members visibly wept over the UK leaving, is coordinating the delivery of military hardware to a non-member for use in an active conflict should speak volumes about the level of support Ukraine is getting.
My guess is they'll initially sortie from Romania, maintaining IFF silence for plausible deniability, while a coordinated strike with man-and-vehicle portable SAMs retakes enough airspace in the western part of the country to support further operations.
You're proposing military aircraft owned by an EU member state should launch from their airfields in EU, sneak over the border and land in Ukraine, refuel and (re-)arm - and perhaps get a quick paint job too and have the aviation equivalent of their serial numbers filed off - then start attacking Russian forces in Ukraine, and our plan would be basically to hope that the enemy with apparently complete air superiority plus satellite capability might not notice?
I'm firmly anti-war; that plan sounds like a great way to drag the EU and/or NATO straight into this one.
