thread i don't even think it'd need that much
if you could do 3.5 -4 then you'd be winning for centre to centre travel.

lots of people who travel a lot though are set up to get to airports easily which can cut that advantage.
permalink Three hours is I think
The supposed mark at which short haul (hour or so) flying gets completely obliterated by rail.
permalink looking at paris-Marseille
which is 3h18m it seems you are right.

hourly flights (though all the loss making air france)
permalink And flights to major hubs
Like LHR for BAW or CDG for AFR don't really count, as they're funnelling connecting traffic mostly, not point to point
permalink which is partly why
CdG is an important stop on the TGV network
permalink It is indeed
zut alors!