Free to Illinois residents during September. Monday thru Wednesday.
On certain scheduled days check the website for dates!
Cost for resident located others states in Us?
It is free during certain days. https://www.sheddaquarium.org/plan-a-visit/get-tickets/discount-and-free-days/illinois-resident-free-days There are also passes available at the Chicago Public Library. They also participate in the museums for all program which has other free or discounted ticket programs. https://www.sheddaquarium.org/plan-a-visit/get-tickets/discount-and-free-days/museums-for-all/museums-for-all-faqs
Thanks! Your answer is awaiting moderation.