Biarritz airport to Biarritz station by Chronoplus ligne "C", every 20mn, journey 12mn.
http://www.chronoplus...horaires/?rub_code=23
Biarritz to Hendaye by SNCF train at 16h13, 17h26, 18h13, 18h44 and 19h42, 19h59, 20h12 and 20h37, journey time 26mn.
http://www.voyages-sncf.com/
Leave Hendaye SNCF station and cross to the "Euskotren" narrow gauge station - trains to Donostia (San Sebastian) at 03 and 33 past each hour with last train at 22h33.
http://www.euskotren....B3n/oficinasyhorarios
train arrives at Amara station, walk south along av. de sancho "el sabio" to Plaza del Pio XII, and main bus station is on your left, between there and the river.
Bus operated by Alsa to Pamplona at 17h00, 18h30, 19h30 and 20h30. the first morning sevice is at 07h00. Journey 75mn.
http://www.alsa.es/en/buy-and-schedules/