Originally Posted by
thesaints
Correct. After showing my foreign passport at checkin in SFO I did not have to pull it out again until arrival in Europe, although I connected at JFK. A few days before departure back to the US I changed the information on FlyReady to my US passport. That triggered a reduction in other forms to be filled (no proof of vaccination, etc.).
What about coming back to the US? Did you have to flash US passport at check-in so they didn't require the visa waiver?