JFYI, this is our experience flying out of France and into US with required COVID-related documentation after a 4 week visit:
- COVID TEST RESULT, and
- US CDC “PASSENGER DISCLOSURE AND ATTESTATION TO THE UNITED STATES OF AMERICA” (US ATTESTATION) form.
Our return flight to the US was on Sep 20 (Mon). We therefore had our COVID antigen test done on Sep 18 (Sat) at a pharmacy in Honfleur, Normandy. From the time we entered the door of the pharmacy until we left with a hard copy of the results took 20 minutes; a soft copy was emailed to us shortly later the same day. Cost was about 25 Euro per person. (We also scanned the QR code of the results into our Pass Sanitaire on our cellphones, though strictly speaking it wasn't necessary as we are vaccinated.)
On Sep 20 we flew from France (CDG) via Amsterdam (AMS) to Seattle (SEA). The ticketing was through DELTA; the first leg was on KLM with the cross-Atlantic leg on DELTA. Below describes each "checkpoint" for this journey and the COVID-related check. (For the COVID TEST results, we showed the paper version.)
Check-in with airline at CDG airport: The airline employee who checked us in and provided boarding passes examined our COVID TEST RESULTs.
Boarding intra-EU flight from CDG to AMS: Did not need to show test results, but had to show proof of vaccination. We
therefore showed our Pass Sanitaire (which had our vaccination status).Passing through Immigration at AMS when transferring from EU to international terminal: did NOT show anything related to COVID status.
At the AMS departure gate for SEA, there were two checkpoints. First, AMS Terminal Security examined our US ATTESTATION form; passengers who did not have one were provided copies to fill out.
The second check at the AMS departure gate was done by the airline boarding agent, who examined and collected the US
ATTESTATION form.Upon arrival in the US, US Immigration examined our COVID TEST RESULTs. (I think we also had to be ready to show it at US Customs, but might be misremembering.)
To summarize, the COVID TEST RESULTs were examined 2-3 times but not collected, and the US ATTESTATION form was examined 2 times and collected.