I am a British Citizen who will be travelling to Canada and then onwards to USA by train and then returning to Canada by air. I am aware that I do not need an ESTA to enter the USA by train but do I need any documents when traveling back from the USA to Canada by Air? I will be flying home to the UK a few days after returning to Canada. I am only spending a week in Canada and a week in the USA.
To clarify, the travel plans looks like this:
- Fly UK to Canada
- Train from Canada to USA (Vancouver to Seattle)
- Domestic flight from Portland to San Francisco
- Flight from San Francisco to Vancouver
- Return to UK from Canada
So, after taking the trip I can confirm that you can travel by train from Canada to the states without an ESTA but it's a bit of a hassle (paperwork, fingerprints, payment must be in USD) and it would have been easier to just get an ESTA. Returning to Canada from the US wasn't an issue.