I had a quick look on this forum and couldn't see a previous post, so apologies if this has come up before. I want to travel out from London and alight at Calais and return from Belgium on any "Any Belgium" ticket (not exactly sure which station I shall be returning from yet). I'm actually heading for De Panne but it looks to me to be quicker to alight at Calais, take a train onto Dunkirk and then a bus (which I believe is free) to De Panne than to go to Brussels and back up to the coast (unfortunately, the Dover to Dunkirk ferry does not accept foot passengers). I could book a single London to Calais and a single Any Belgium Station back to London. However it is cheaper to book a return London to Any Belgium Station. The train I want to travel out of London on stops at Calais. So my question is, can I book a ticket to any Belgium Station and alight early at Calais? If so will it cause me any problems on the return? I can find this FAQ which suggests you can use a ticket booked from any Kent station at London and vice-versa. It also mentions you must board on the continent at your specified station. However there is nothing about alighting early. The FAQ I found is https://help.eurostar.com/faq/uk-en/question/I-ve-booked-from-one-station-can-I-board-at-another Is it possible? Or should I book two single instead and pay the difference.