ArrivalZenAirports: the busiest hours at security
The Transportation Security Administration counts how many people it screens at every airport, hour by hour. We turn those counts into a clear picture of when each airport is heaviest, by day of the week.
National parks: the busiest and quietest months
The National Park Service counts visits at all 63 national parks every month. We show the busiest month, the quietest month that is still open, and how big the gap is.
A taste of the gap
At Gateway Arch, a typical July brings 5.8 times the visitors of a typical December, and that quieter month is still open. The park draws about 1.9 million visits a year. See the month-by-month chart.
How we keep it honest
- Every figure comes from a government source, and the methodology page shows the working.
- Airport figures count people screened. They are not wait times, and we never present them as wait times.
- Park figures are monthly, so they show the shape of the year, not a particular week.
- It is history, not a forecast. Check live conditions before you travel.