Adler Planetarium is free wednesdays 4pm–10pm — for Illinois residents. Accepted proof: valid Illinois driver's license/photo ID, an Illinois student photo ID, or a photo ID plus a document (utility bill, lease) showing an Illinois address.. Adler offers free general Museum Entry (not sky shows) to Illinois residents on specific 'Illinois Resident Discount Days' announced through the year, plus free general admission every Wednesday evening from 4-10pm. Tickets should be reserved online in advance (use your zip code as the promo code); timed entry. Verified on Adler Planetarium's own page, last checked 2026-10-01.
| Free day | Wednesdays 4pm–10pm |
|---|---|
| Who qualifies | Illinois residents. Accepted proof: valid Illinois driver's license/photo ID, an Illinois student photo ID, or a photo ID plus a document (utility bill, lease) showing an Illinois address. |
| Reservation | Tickets should be reserved online in advance (use your zip code as the promo code); timed entry. |
| What's included | Free tickets cover Museum Entry only — sky shows are not included and can be added at a discount. |
| Regular adult price | Standard adult general admission starts at $25.00; child tickets start at $13.00 (single-entry base ticket; dome shows are extra). |
| Source | adlerplanetarium.org · checked 2026-10-01 |
Regular adult admission at Adler Planetarium is $25, so timing the visit to the free window keeps $50 in a couple's pocket and up to $100 for a family of four — every qualifying week. That's what Illinois residents leave on the table every time they pay walk-up prices. The catch is capacity, not money: free slots are reserved in advance and the popular dates go first, so the reservation is the real currency here.
Regular tickets (Standard adult general admission starts at $25.00; child tickets start at $13.00 (single-entry base ticket; dome shows are extra).) are on adlerplanetarium.org — book direct, there's no markup. Making a Chicago trip of it? CityPASS Chicago bundles several of the city's top attractions at a discount — check whether Adler Planetarium is in the current lineup before buying.
Brookfield Zoo Chicago (announced in batches) · Art Institute of Chicago (3rd thursday monthly 5pm–8pm) · Chicago Children's Museum (no regular free day) · Chicago History Museum (published dates) · DuSable Black History Museum and Education Center (wednesdays) · Field Museum (wednesdays) · Griffin Museum of Science and Industry (published dates) · Lincoln Park Zoo (always free) — or see the full free museum days in Chicago guide.
One short email a month with Chicago's verified free days — the dates, the resident rules, nothing else.
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Adler offers free general Museum Entry (not sky shows) to Illinois residents on specific 'Illinois Resident Discount Days' announced through the year, plus free general admission every Wednesday evening from 4-10pm.
Tickets should be reserved online in advance (use your zip code as the promo code); timed entry.
The free days are for Illinois residents. Accepted proof: valid Illinois driver's license/photo ID, an Illinois student photo ID, or a photo ID plus a document (utility bill, lease) showing an Illinois address. — typically with ID or proof of residency. Visitors pay regular admission (Standard adult general admission starts at $25.00; child tickets start at $13.00 (single-entry base ticket; dome shows are extra).), or can get in free on a Museums on Us weekend with a Bank of America card.
Free tickets cover Museum Entry only — sky shows are not included and can be added at a discount.
Standard adult general admission starts at $25.00; child tickets start at $13.00 (single-entry base ticket; dome shows are extra).. That's what a well-timed visit saves you.
At $25 per adult, two adults keep $50 and a group of four paying adult prices keeps up to $100 per visit — before parking and extras.