There currently is one option to travel by night train from Paris to Tarbes, taking between approximately 11 and 12 hours: Namely the INTERCITES DE NUIT 3731 operated by SNCF.
The National Company of the French Railways (SNCF) operates a handful of lines throughout continental France. They usually offer two types of carriages in their night trains: seats and couchettes. Couchettes can accommodate up to four people.
For the next 7 dates with connections, the cheapest offer starts at 29 CHF. Check our connection pages below for all availabilities!