I didn't see anybody mention this site, so here it is:
Airwarfare.com has missions and campaigns. Check out their downloads section. Most typically start out with just take-off, do a loop, then land...then move on to more complex objectives.
http://airwarfare.com/sow/index.php
The site is a little underutilized, in my opinion. Their sister site, Mission4Today, is the golden standard for all things IL-2:1946. It is a great place to upload and download files for Cliffs of Dover.