One of the best resources we have for what you are seeking are the individual airline forums where most major airlines have dozens of active threads. And there is a lot of historical data going back several years.

Once you narrow down the airlines you will be using, you can visit those forums and do research on your questions or start a new thread.

And another resource you might want to check out is our Trip Reports forum where there are thousands of reports and reviews on locations all over the world.

Enjoy your trips.