London to Genève / Geneva by train

The Eurostar will arrive in Paris at the Gare Du Nord, but the Lyria train on to Geneve will depart from the Gare De Lyon.

This guide explains how to make the transfer between the two stations by RER train.
The London to Geneve tickets do not include the transfer across Paris.

When making a booking, check the connection time between the arrival at Gare Du Nord and the departure from Gare De Lyon.
The wide variation in the end-to-end journey time is due to the discrepancies between the timings of the Eurostar arrivals and Lyria departures.

The connections with a journey time of around 8 hours factor in around 2hr 15min to make the cross-city transfer, time enough for a lunch in the fabulous Le Train Bleu restaurant within the Gare De Lyon, or in brasserie by the station.

Book Early And Save: Yes

Online bookings open: 4 months ahead

The very cheapest tickets tend to sell out particularly quickly on this route - they're more likely to be available if you can travel on a Tuesday - Thursday, or are happy to set off from London early in the morning.

The price below is for a one way fare - if you're booking a return ticket, it's likely you will be offered a cheaper price in each direction.

On Trainline the main station in Geneve/Geneva is named 'Genéve-Cornavin'.

Eurostar does not sell tickets for this journey.

If you want to make a London to Geneva train journey and avoid travelling via Paris then an option is to make comparatively straightforward connections between trains in both Lille and Lyon
The positive of taking this combination of trains is the avoidance of having to make the transfer across Paris from the Gare du Nord to the Gare de Lyon.

The transfer times between trains will be 35 mins in Lille and 38 mins in Lyon, which will typically allow the connections to be relatively uncomplicated - if the trains are on schedule you won't be rushing through an unfamiliar station against the clock, and neither will you be hanging around awaiting departure.

Though the potential negative is that those transfer times won't allow much contingency in the unlikely event of delayed trains.
Completing the end-to-end journey in a single day is dependent on making that 35 min connection in Lille.

If need be there will be later trains on from Lyon to Geneve and tickets will be valid on any of these departures, because reservations aren't required on TER trains.

Book Early And Save: Yes

Online bookings open: 90 days ahead

This journey tends to be (much) more expensive than travelling via Paris.

Eurostar ticket terms summary

If you book Standard or Standard Premier tickets, you can exchange them if need be, to an alternative departure on your booked route; but if you want to transfer your ticket to a new departure less than 7 days before your travel date, you will need to pay an admin fee of £30 for Standard Class tickets, £40 for Standard Premier tickets PLUS the price difference with the new ticket you will be booking.
What's new, in response to the pandemic, is that these £30/40 charges aren't applied if you want to transfer to an alternative departure more than seven days before your travel date.

Business Premier tickets are less restrictive, in response to the pandemic they can now be refunded and they can be exchanged to alternative departures without paying the admin fee, or the price difference.