What happens if my plans change and I’ve already taken a COVID-19 test?
If you’ve already taken a COVID-19 test and you’ve rescheduled or cancelled your flight, contact your airline about COVID-19 test policies. Whether or not your test result will be valid depends on both the
collection date and the COVID-19 testing requirements of both your origin and destination city/country. Refer to your airline policies on COVID-19 testing fees in the event of flight cancellation or rescheduling.