Kevin, thanks for your help. I found the same information.
Maybe there is a option to direct transport, not throught Tarbes?
Don't rely on Rome 2 Rio much of their information is wildly inaccurate.
Page is only in French at hautespyrenees.fr/fr/transports-maligne-accu…
You can also travel by train between Tares and Lourdes about once every two hours, reservations not required.Edited: 04 June 2018, 12:41
To sum up, everything goes ok. Two day before my flight. I have called to information center in Lourdes. They reserved for me the place, It is not possible to call 0 800 for the next country than France.
The bus was Renault Trafic, the way take about 1.5 hour. The bus don't speak english, please take printed timetable to show how do you want to go.