Why wouldn't you just take the direct Lille-Montpellier train that leaves Lille at 09:00 and arrives in Montpellier at 14:01?
I don't understand your contorted itinerary. You start by taking a 2hr Thalys instead of the regular TGV that goes from Lille to Paris in 1 hour. One of these leaves Lille every 30 minutes or so.
Then somehow you go from Paris Nord to... Bercy instead of Paris Lyon? Bercy only serves regional trains, TGVs leave from gare de Lyon. Then you look for a train that goes to Barcelona instead of one that only goes to Montpellier?
Voyages-sncf.com, Capitaine Train and Bahn.de all show the direct 9812 TGV that I have already taken a few times to go to Lyon or Montpellier. It doesn't go through Paris, stops in a few places like Charles-de-Gaulle airport and Lyon. It actually departs from Brussels, not Lille. It's moderately expensive, at 144€.
I don't understand your contorted itinerary. You start by taking a 2hr Thalys instead of the regular TGV that goes from Lille to Paris in 1 hour. One of these leaves Lille every 30 minutes or so.
Then somehow you go from Paris Nord to... Bercy instead of Paris Lyon? Bercy only serves regional trains, TGVs leave from gare de Lyon. Then you look for a train that goes to Barcelona instead of one that only goes to Montpellier?
Voyages-sncf.com, Capitaine Train and Bahn.de all show the direct 9812 TGV that I have already taken a few times to go to Lyon or Montpellier. It doesn't go through Paris, stops in a few places like Charles-de-Gaulle airport and Lyon. It actually departs from Brussels, not Lille. It's moderately expensive, at 144€.