Six Flags Great America hours

24 published datesLocal time (Chicago)

Next open on Friday 18 September from 17:00 – 23:00. Most days it opens at 11:00.

Next open day

17:00 – 23:00

Next open on Friday 18 September, open for 6 hours.

See Six Flags Great America wait times right now

Typical hours by day of the week

Across the next 24 published dates. Individual days vary - check the calendar below for the date you are visiting.

Monday11:00 – 19:00on all 1 published Monday

Thursday17:00 – 23:00on all 2 published Thursdays

Friday17:00 – 23:00on all 7 published Fridays

Saturday10:00 – 22:00on 5 of 7 Saturdays - hours vary

Sunday11:00 – 22:00on 6 of 7 Sundays - hours vary

Six Flags Great America hours, September 2026

Fri 18 17:00 – 23:00

Sat 19 11:00 – 23:00

Sun 20 11:00 – 22:00

Fri 25 17:00 – 23:00

Sat 26 11:00 – 23:00

Sun 27 11:00 – 22:00

Six Flags Great America hours, October 2026

Fri 2 17:00 – 23:00

Sat 3 10:00 – 22:00

Sun 4 11:00 – 22:00

Fri 9 17:00 – 23:00

Sat 10 10:00 – 22:00

Sun 11 11:00 – 22:00

Mon 12 11:00 – 19:00

Fri 16 17:00 – 23:00

Sat 17 10:00 – 22:00

Sun 18 11:00 – 22:00

Thu 22 17:00 – 23:00

Fri 23 17:00 – 23:00

Sat 24 10:00 – 22:00

Sun 25 11:00 – 22:00

Thu 29 17:00 – 23:00

Fri 30 17:00 – 23:00

Sat 31 10:00 – 22:00

Six Flags Great America hours, November 2026

Sun 1 11:00 – 21:00

Hours come from Six Flags Great America's own published schedule and are checked on every update to this site. Parks change hours at short notice, especially for weather and special events - confirm on the day with the park before you travel.

Six Flags Great America hours: common questions

What time does Six Flags Great America open?

Six Flags Great America most often opens at 11:00. Across its next 24 published dates the opening time is 11:00 more than any other, though it varies by season and event - the calendar on this page lists every date individually.

What time does Six Flags Great America close?

Next open on Friday 18 September from 17:00 – 23:00, an operating day of 6 hours. Closing time changes through the season - later in summer, earlier in winter - so check the date you are visiting in the calendar above.

How busy is Six Flags Great America on the day I am visiting?

Opening hours tell you when the gates are open, not how long the queues will be. The Six Flags Great America crowd calendar forecasts how busy each date will be, and the live board shows every ride's wait time right now.