How long does it take to get to STN from Devon? Around 4-5 hours. It would not just cater for people travelling to London but also many people transferring to the plethora of services from STN to mainland Europe. I know the trains are pretty quick into Paddington but they're bloody expensive. And if you want to travel to somewhere like Essex or East London you can add another hour at least on to the journey and factor in the tube or pricey taxis. I'd love to see FR try STN, if anyone can make it work its them. VLM might be a possibility on the LCY route.