How long mail take from northern Idaho to sourthern california?

The time mail will take from northern Idaho to southern California depends on the shipping method you choose and the specific location you're sending to. Generally, First-Class Mail from Idaho to California takes between two and four business days to arrive. Priority Mail usually takes between one and three business days. If you select express shipping methods like Priority Mail Express or UPS Overnight, your mail could arrive as quickly as the next business day.

You can use the United States Postal Service (USPS) website or the UPS website to calculate shipping times and postage costs based on your exact location and the weight and dimensions of your parcel.