I was in Samara for over three years. But I have not been back since 2003.
RJ100 covered most of it already but...
I recommend the Smuishlyaevka airport. It will take alot of hiking to get around but there is a Tu144 and other awesome airliners to see. Yak42, Tu154, etc.
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Photo © ChW
(my pictures from the airport)
The aviation museum at the aerospace institute
Trip down the Volga at the boat station
If you were there in winter you could spend 50 rubles and take a MI
-8 across the Volga (that's how much it cost a few years ago at least)
I hope you are able to take Samara Airlines. They always are very nice!