We were visiting the Loire Chateaux back in 2004 and our hotel was just beside the station in Tour , there was about 8 TGV sets waiting , and I was drooling !!!
So during dinner I ask our guide if I had the time to do a ride and she found me a way to do it before the morning visits .
So I got up soon in the morning and went to Paris 300 km away ( about 185 miles ) , left Tour Station at 6:15 am and at 7:25 I was in the station in downtown Paris !!!
Had a coffee and a croissant , bought an Eiffel tower postcard to proove the others that I went to Paris in the morning .
Took the train back at 7:45 am and got off at 8:55 am in Tour !!!!
The bus was leaving at 9:00 and I had the time to do 600 km. during the time the group was getting up and had breakfast !!!!!!!
So try that with a plane with all the problem getting on board and having to be there at least 1 hour before ...