Dual Passport Usage Multiple Country Flight Path
Hi everyone! I searched the group but didn’t find some of the information I’m searching for.
I hold both a USA and UK passport. I previously have traveled to the UK just on USA passport with the ETA the past couple of years.
I have an upcoming trip where I will be traveling from the US with a domestic layover and arrive in London. On the return I will be going from London to Paris to the US.
I know leaving the US I will use my US passport and just show my UK passport to prove I don’t need the ETA. I will use my UK passport on arrival in London.
More of my questions are around what passport to show at LHR on return, at CDG for layover, and I presume US passport boarding at CDG returning to the states? This is my first time actually traveling on both and not using ETA so hoping to follow the proper process to avoid border issues.
Thank you!