Originally Posted by
submatrix
Looking for some guidance on taking the train to/from LHR. On arrival we are staying at the Churchill, so sounds like Heathrow Express to Paddington is the best option, with it being cheap if bought in advance online. At the end of our trip we plan to be at the Andaz, so is the Elizabeth Line the best choice? Is this a different train system from Heathrow Express, with its own ticketing system? If so, where is the best option to buy tickets online, and is there any advantage to buying in advance?
Elizabeth Line to/from Andaz is a no brainer. It's part of the 'regular' tube system for lack of better term, so a simple contactless payment at the turnstile is all you need, like a credit card. Super easy. No need to buy anything in advance.