Originally Posted by
pewpew
It takes a couple days from exposure to testing positive, so if you test negative pre-travel and positive post-travel, it's not because of the time you spent in the airport
The timing of exposure to infection suggests that a passenger could minimize (and greatly reduce) the risk of testing positive upon arrival by self quarantining at home for close to two weeks before departure, only going out to get a COVID-19 test at the appropriate time before flying and then to go to the airport.
It's even better if the test can be done without leaving one's car.