Theta JA : 40C/W
Psi JT : 17C/W
(Note: You can find this value in S29AL008J Reliability Report in page 2 of 9 from this link : S29AL008J Reliability Report | Cypress Semiconductor)
We do not provide theta JC and theta JB thermal resistance values for our flash products. We usually give psi JT and theta JA parameters which provides a meaningful method to predict junction temperature in plastic package devices. Please find our application note "Thermal Considerations and Parameters" available at: http://www.cypress.com/file/210756/download. It explains why theta JC and theta JB values are not good approximations for plastic packages. I hope this application note is helpful for you.