The answer depends on the number of photos you need to "Scan" Most Photo shops or camera departments in many Big Stores can either offer the service or point you to it. HOWEVER IT COSTS MONEY
Most bigger office supply stores can sell you special photo scanners where you can stuff either 20 photos or 20 slides (Number chosen at random in this case) and push a button and photos #1 to 20 suddenly appear on your hard drive.
I googled Photo Scanners and found a couple that might qualify.
My latest doctor has a scanner on the reception desk that scanned my Insurance cards and driver's license. I suspect it can do slides as well though it might take a different model.
Try "Slide scanner" instead of photo