How long does USPS mail from Chicago to Ontario?

The delivery time for USPS mail from Chicago to Ontario depends on the class of mail, the package's weight, and size, as well as its destination.

Standard mail (letters and flats) typically takes between 7 to 10 business days to be delivered from Chicago to Ontario. First-Class mail (envelopes and postcards) usually takes between 3 to 5 business days, and Priority Mail Express Guaranteed can arrive within 1 to 2 business days if mailed to a major city in Ontario.

However, it's essential to note that these delivery times are estimates and may vary depending on factors such as weather conditions, customs clearance, and the volume of mail being processed.

For more accurate and up-to-date delivery estimates, you can use USPS's Delivery Date Calculator or contact your local post office for assistance.