Best time to visit Six Flags Great America
Six Flags Great America is quietest in September, June, July, averaging around 42% crowd levels in September. Wednesday is typically the calmest day of the week, at about 36%. Avoid May and August - May peaks near 68%.
Quietest month to visit
Averages 42% crowd level across 18 recorded days, 26 points below May. The busiest is May at 68%.
Open the September 2026 calendarQuietest months to visit Six Flags Great America
Crowd level by month
146 recorded days · % crowd level - how full the park was: queue length on one scale (50% is about a 17-minute queue) or, where it sells dated tickets, the share of capacity sold
September averages 42% crowd level at Six Flags Great America - typical - from 18 recorded days. That is 7 points below the typical month.
Open the September 2026 calendarSix Flags Great America season by season
Which season to visit
Quietest is September to November at 42%, busiest is March to May at 68%
Spring. March to May averages 68% crowd level at Six Flags Great America, from 30 recorded days.
Summer. June to August averages 46% crowd level at Six Flags Great America, from 92 recorded days. Within it, June is the calmest at 44% and August the busiest at 47%.
Autumn. September to November averages 42% crowd level at Six Flags Great America, from 24 recorded days.
Winter. Six Flags Great America has too few recorded operating days from December to February to rank the season honestly - usually a closed or reduced-hours period.
Quietest day of the week at Six Flags Great America
Crowd level by day of the week
Averaged across 146 recorded days
- Mon53%
- Tue41%
- Wed36%Quietest day of the week here
- Thu42%
- Fri48%
- Sat59%
- Sun66%
Wednesday is the calmest day at Six Flags Great America, averaging 36% against 66% on Sunday. Weekdays run 18 points below weekends.
Best time of day to arrive at Six Flags Great America
Average wait by hour
Park-wide, across the last 45 operating days · minutes
The park-wide average is 18 minutes at 11am, peaking at 29 minutes around 3pm and easing to 15 minutes by 9pm. Walking in at opening rather than at the peak is worth about 11 minutes on every queue you join, across every tracked ride.
How the Six Flags Great America crowd figures are worked out
Every figure on this page comes from queue times recorded at Six Flags Great America itself, sampled every few minutes across every ride the park publishes and stored day by day. A day's crowd score is that day's average wait expressed against this park's own busiest recorded day, so 100% means "as bad as it gets here" rather than "as bad as it gets anywhere" - a quiet day at a small park and a quiet day at Six Flags Great America are not the same number of minutes, and scoring each park against itself is the only way the months stay comparable. In plain minutes, the park-wide average across the last 45 operating days runs from 15 minutes at its calmest hour to 29 minutes at 3pm. Months with fewer than 10 recorded operating days are left unranked rather than averaged from a handful of days, and holidays, school terms and weather are all part of the model.
We publish how well those forecasts actually hold up: the crowd forecast accuracy ledger scores every past prediction against what the queues did on the day, versioned so you can see whether the model is getting better or worse. If you are choosing between parks rather than dates, the best time to visit a theme park guide covers the seasonal patterns that hold across every park we track, and the Six Flags Great America crowd calendar gives you a day-by-day forecast for the specific dates you are considering. Always check the park's own site for opening hours and closures before travelling.
Frequently asked
When is the best time to visit Six Flags Great America?
Weekdays in term-time are usually the quietest at Six Flags Great America, with midweek (Tuesday-Thursday) typically calmer than weekends and school holidays. Arrive at opening to beat the longest queues.
What are the quietest days at Six Flags Great America?
Midweek days outside school holidays are normally the quietest. Saturdays, Sundays and holiday periods see the biggest crowds.
Is Six Flags Great America busy today?
Crowd levels change daily. See Six Flags Great America's live crowd calendar for a day-by-day forecast and today's expected crowd level.
When does Six Flags Great America get busiest?
Weekends, school holidays and major event days (e.g. public holidays and school breaks and seasonal events) are the busiest. Crowds also peak in the middle of the day.
What time should I arrive at Six Flags Great America?
Be at the gates for opening. The park-wide average is 18 minutes a ride at 11am, rising to 29 minutes around 3pm - so arriving at opening rather than at the peak saves roughly 11 minutes on every queue you join.
How long are the queues at Six Flags Great America?
Across the last 45 recorded operating days, the park-wide average has run between 15 and 29 minutes a ride depending on the hour. Individual headline rides queue considerably longer than the park-wide average.
Is it worth visiting Six Flags Great America midweek?
Yes. Monday to Friday averages 45% crowd level at Six Flags Great America against 63% at weekends - 18 points quieter - so a midweek day in term time is the single biggest saving available.