I ship Monday to Thursday if you want the flies, as it's usually 2–3-day delivery and the flies shouldn't sit around over a weekend in a box (USPS does not guarantee delivery on Sundays).

I ship Monday-Saturday if you only want the kit and no flies.

**Please Note: The flies are LIVE insects and as such, they are subjected to probably less than ideal conditions during shipping. If you have die-off, please contact me immediately so we can work something out. The flies may be dead but the larvae in the eggs will still be viable and will produce. Prompt Communication with me is the key as I want you to be happy with your purchase. I am a hobbyist like you and not a profit-making business. **