Shipping speeds are visible at checkout depending on your cart contents, so you can find a shipping method that best lines up with your upcoming trips. Just make sure that you are only checking out with in-stock items as any backordered items will delay the shipment date of an order until all items are back in stock.
As all mail carriers are experiencing delays, note that the shipping estimates are estimates, not guarantees, though most if not all deliveries have still been delivered within the window of time selected. We recommend you budget for the full window and plan for extra transit time.