For travelers that are unable to find a testing site that will provide asymptomatic testing within the 72 hour window, is there a waiver or other option to be able to travel?

Travelers unable to get testing prior to travel are encouraged to purchase an at home test kit. There are FDA-authorized home-collection COVID tests for people who want to take a test at home and mail it to a company to get results, such as:

Pixel system from LabCorp

Everlywell COVID-19 Test Home Collection Kit

Vault Health

Picture Genetics 

The COVID Consultants

Azova

ImmunitiRx