Is it possible to travel by bus from Savannakhet to Phonsavan ? How easy / comfort ? Duration ?
It is very possible to travel by bus from Savannakhet to Phonsavan but you will probably not be able to do it direct. You might have to travel to Vientiene first then another bus up to Phonsavan.
We did this route but in reverse, I can't remember exactly how long but it was around 9 hours from Phonsavan - Vientiene then another 5 from Vientiene to Phonsavan, we stopped at various places in between each place so got quite a few buses all in all but I'm pretty sure you'd be able to do it in 2 long trips. The roads are very windy which makes it a bit more uncomfortable than it would be but it wasn't so bad.
The buses are ok.. ask to have a look at which one you're likely to be going on, I know one we went on was a nice modern coach with air con but they do pack people in as they stop along the road but as you'll be getting on at the start you'll get a seat so should be ok.
Hope this helps
Thanks for the info. Prior replies have mentioned the same. Appreciated. Phil.