Next flight out
Same-day service or delivery from anywhere

AM service
Next business day delivery by noon

PM service
Next business day delivery by 5 PM

2nd day service
2nd business day delivery by 5 PM

3rd day service
3rd business day delivery by 5 PM

Deferred service
As an alternative to LTL, time definite delivery to any domestic locaton.  Appropriate when the customer has some flexibility about delivery.

After hours and weekend service
Precise-time delivery. Most useful when flexibility about delivery is not an option.