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London to Newhaven – 90 km / 56 miles (more like 105-110k for me, 3-4hr)
Newhaven to Dieppe – Ferry (4-5hr)
Dieppe to Paris – 160 km / 100 miles (more like 170-180k, 5-6hr
Total cycling distance = 250 km / 156 milesIt depends on how much I optimise the route, when the ferrys are scheduled so when I go either night/day, any mishaps, how often I get lost, but under 24hr should be pretty easy, under 12 would be pushing it.
I think was a bit cheaper but then I saved on accommodation (not an issue for you!). I think the trip is about 4-5 hours?