http://www.allaces.ru/cgi-bin/s2.cgi...truct/main.dat
This site lists the Soviet air units of WWII, and has often a list of pilots/air crew attached to each unit. Except rare units, these lists are not complete at all (but are covering most losses in 1942).
http://www.obd-memorial.ru/html/advanced-search.htm
The above list is the Russian (or rather Soviet) equivalent of CWGC. You have to type in Russian but it will cover casualties (killed and missing) of the whole war. You can type an unit in the search box and it will provide you a list of casualties more complete than above, but units may be written in different forms. It is also useful to complete the name of a fallen Soviet soldiers.
I suspect that the first post by HGabor above is the result of a search on this website
http://formulyar-polka.narod.ru/t21/tom21-avia.htm
Loss list for the Baltic Sea Fleet Air Force (probably incomplete but still useful)
http://sk16.ru/forum/viewforum.php?f=17
Loss list of most air units in Murmansk area
http://www.bellabs.ru/51/Morozov/Losses.html
Loss list of 51 MTAP
http://militera.lib.ru/h/hazanov_gorbach/04.html
Loss lists of several units involved in Kursk battle (6 IAK 5-12 July, 221 BAD 5-10 July, 302 IAD whole month)