https://www.scientificamerican.com/article/the-fast-lane-for-covid-testing-has-opened-up-in-the-u-s/

After a flight requiring a negative covid test, a passenger wondered why the process became so complicated. They had to go to an approved testing center 25 minutes from their home, pay $175 for a PCR test, download an app and wait 24 hours for a result. This is valuable time that could be almost completely skipped by using a rapid antigen test.