UPS Next Day Air is a shipping service offered by UPS that guarantees delivery of packages by the next business day. This service is ideal for customers who want time-definite next day delivery. UPS Next Day Air offers guaranteed overnight service for time-sensitive shipments and is recommended for shipments that must arrive at the start of the next business day. The service is available in all 50 states and Puerto Rico, with some limitations in Alaska and Hawaii. UPS Next Day Air Saver is a similar service that promises delivery of packages the next business day, but with a lower price tag than the regular Next Day Air service. With Next Day Air Saver, youll still get your package within one business day, but theres a higher chance it will be delivered later in the day. Deliveries are made to most commercial destinations between 3:00 p.m. to 4:30 p.m. and residential locations will receive parcels by the end of the day. The cost of UPS Next Day Air shipping varies depending on the weight and destination of the package, and additional fees and charges may apply.