London (or wherever you currently are) to Paris is a great weekend out.
We did it last year, leaving Surrey at about 1600 on Friday for a 40ish mile ride down to Newhaven with a couple of pints and a chippy stop on the coast.
2230 ferry, arriving at about 0500ish in Dieppe, then a pleasant 135mile ride on quiet roads through the French countryside to Paris following the Donald Hirsch route. Dinner and a few drinks in Paris then a night in a decent bike friendly hostel.
Eurostar back the following day after soendign the morning bimbling along the river.
Self organised and only cost us around £100pp for ferry, train and hostel with no time off work required.
There were plenty of people on the ferry doing the same.
Yep, we also followed the Donald Hirsch route, but took 3.5 days to ride from Greenwich to Paris.
The route through France is great, but there are a couple of hills on this route which less able cyclists will find challenging, especially if you are carrying kit.
I’d do it again though – loved it.
Again, we did it pretty cheaply, staying in Travelodge/Campanile hotels.