Starting in 2026 the UK no longer allows British Citizens to get an ETA to enter the UK on an American Passport. They must use their British Passport to enter the UK.
The problem I’m seeing that I can’t get a straight answer to is by US law any US citizen must enter and leave the US on a US Passport. So with that being the case how is a dual citizen with two passports meant to fly from the US to the UK?


I think you use your us passport when leaving the us and your uk one when arriving at the uk. Full disclosure. I have never traveled internationally. Kinda curious about it since I am a dual citizen.
This is how it works with EU countries.
Yeah you can only use one Passport at a time it has to be registered to your plane ticket
does the registered to plane ticket matter on arrival?
It doesn’t