You have to have a PCR test 48 hours before the flight or an antigen test 24 before the the flight and this would meet the requirements and by taking the antigen test he would have his test results in short order. If he answers the first question yes followed by no or yes for the other questions than he qualifies. Not sure why you think he wouldn't qualify? If he is flying the next day than the only possible answer to the question below is yes.


Are you seeking a test to prevent possible spread of COVID-19 for future travel or recreation (according to CDC guidelines)?
Yes. No



Not sure what time his flight is, but if it is a morning flight, you could test at noon, have your results by 1pm and have 20+ hours before the flight.