Originally Posted by
KARFA
No bar for UK citizens, but if you visit since around 2020/2021 it will mean you can no longer go to the US on an ESTA, you would need to get a full US visa. But even before that BA didn't go to Havana. ...
I went to Cuba around 2017/18 on IB from MAD. Canadians can enter the USA by just showing their Canada passport. I have been pulled into a secondary when they saw a Turkey stamp. They realised I was just changing air line companies so had to go through Turkish passport control twice in an hour. 🙄
I prefer to do land crossings into/out of the USA, thus avoid transit flight through the USA on my way to/from Canada. I avoid TSA at all costs.