Shipping

[Xd21]

Good day 

I need some assistance please. I have some products that are drop shipping and I have some in stock .The delivery time for these items are different but the delivery rate is the same. so when a customer takes a drop shipping and a in stock product the delivery fee double. how can I prevent that from happening? but at checkout I still want the customer to know that the delivery will take longer even if they purchase a in stock item. please assist me 

[dropship_helps]

You can mention the shipping time in each product. 

This app may helpful to you.  https://apps.shopify.com/omega-estimated-shipping-date