Return planning starts on the departure day rather than copying the arrival request backwards. State the airport or station, the required arrival time you are working towards, and the Chamonix valley address from which the journey would begin.
Departure-day checklist
- Airport or station endpoint
- Requested local departure time
- Accommodation access details
- Luggage and group changes since arrival
The enquiry can then be assessed as a separate itinerary instead of an automatic reverse route.