https://www.macrotrends.net/2324/sp-500-historical-chart-data
S&P 500 Index - 90 Year Historical Chart. Interactive chart of the S&P 500 stock market index since 1927. Historical data is inflation-adjusted using the headline CPI and each data point represents the month-end closing value. The current month is updated on an hourly basis with today's latest value.
Bing
https://www.barchart.com/etfs-funds/quotes/SPY/technical-chart
For example, you can get a Daily chart with 6 months of data from one year ago by entering an End Date from one year back. Display Settings - further define what the chart will look like. Price Box - when checked, displays a "Data View" window as you mouse-over the chart, showing OHLC for the bar, and all indicator values for the given bar.
Bing
https://marketchameleon.com/Overview/SPY/StockChart
Use the Advanced Stock Chart's date range selection to toggle between short term and long term stock price charts for SPY, from one-day to 3-year. On the top chart, you'll see a display of SPY's stock price, and below, use the Technical Analysis selection to change companion data for the chart.
Bing
https://www.barchart.com/etfs-funds/quotes/SPY/technical-chart
Note for Futures Contracts: Barchart's charting application commonly uses the * symbol on futures contracts as a shortcut to specify the month. For example, ZC*1 will return the front month, ZC*2 returns the second month out, ZC*3 returns the third month out, etc.
Bing