Several times:
- From Chicago to Niagara Falls via Boston, New York etc down to Atlanta on a road trip with my uncle's family in September 1990.
- My first job was 1987 to 1990 at a UK office of Data General, I spent a week at the Westborough Massachusetts headquarters and then was made redundant 4 weeks later.
- Next time I flew on Concorde Heathrow to JFK in 2003 the last year of service (what an experience) and spent 4 days in a hotel overlooking Central Park. Intrepid Air and Space Museum was the highlight for me in New York.
- In May and June 2024 first in Canada riding the Rocky Mountaineer train from Banff to Vancouver, and then on a 10 night Alaska cruise on Viking Ocean from Vancouver to Seward and fly back from Anchorage. That was a great trip. Saw one moose from the coach to Anchorage airport.
I also worked from 2000 to 2005 for a UK office of a New Brunswick based Canadian telco subsidiary. I twice visited HQ for a week each i St John's New Brunswick, in January the first time for my sins. Didn't get to the US on those trips, but I did learn not to fly to Toronto and then all the way back.
Clearly given I've been to the US a few times I wasn't paying attention give the things I don't know about the US.
The UK has changed a lot since the early 1970s, as has pretty much everywhere.