Executive Summary: Take hourly PESA bus from Bilbao (Loiu) Airport to Donostia/San Sebastian outdoor bus station at Plaza Pio XII. Take ALSA or Ekaildebus bus from San Sebastian bus station to Irun Renfe Station, or, walk 700 meters to Euskotren Amara station, and take the Euskotren to Irun Colon Station.
Bilbao Airport (Loiu)(BIO)
http://www.aena-aeropuertos.es/csee/Satellite/Aeropuerto-Bilbao/en/Home.html
PESA
http://www.pesa.net/pesa/public_home/ctrl_home.php
ALSA
https://www.alsa.es/
Euskotren
http://www.euskotren.es/
Ekialdebus
http://www.ekialdebus.net/inicio/?lang=es
Map San Sebastian - 41 is Renfe station 42 is Euskotren Amara station 43 is Bus station
http://www.sansebastianturismo.com/images/ssturismo/pdf/city-map-donostia-san-sebastian.pdf
Here are transportation facilities in Bilbao. Information was written on how to get to SJPdP via Irun.
1600 Bilbao
1601 This section discusses transportation Services in Bilbao.
Index 1600
1602 Bilbao
1603 Bilbao Airport
1604 Getting Around in Bilbao
1605 Bilbao Bus Station
1606 Bilbao Train Station
1607 Bilbao Train Service
1608 Destinations from Bilbao
1660 Bilbao to Saint Jean Pied de Port via Bayonne
1602
Bilbao
Bilbao
http://www.bilbao.net/cs/Satellite?pagename=Bilbaonet/Page/BIO_preHome
Bizkaia
http://www.bizkaia.net/Home/ca_index.asp
1603
Bilbao Airport
Bilbao Airport (Loiu)(BIO)
http://www.aena-aeropuertos.es/csee/Satellite/Aeropuerto-Bilbao/en/Home.html
1604
Getting Around in Bilbao
PESA connects direct from Bilbao Airport (Loiu) to Donostia/San Sebastian bus station.
http://www.pesa.net/pesa/public_home/ctrl_home.php
Bizkaia bus service connects from Airport to Termibus bus station. The schedule is found on the Termibus website.
Termibus is co-located with San Mames station.
Bilbao Metro, Cercanius, and Euskotren connect San Mames to Abando station.
Bizkaia bus provides urban bus service in Bilbao Metropolitan Area including Bilbao Airport.
http://www.bizkaia.net/home2/Temas/DetalleTema.asp?Tem_Codigo=195&idioma=CA&bnetmobile=0&dpto_biz=&codpath_biz=|195
Bilbobus provides urban bus service to Bilbao.
http://www.bilbao.net/cs/Satellite?cid=1279132680834&language=en&pagename=Bilbaonet/Page/BIO_detallePagina
Bilbao has three commuter train networks. Metro, Cercanius and Euskotren.
Bilbao Metro
http://www.metrobilbao.net/
Bilbao Renfe Cercanius
http://www.renfe.com/EN/viajeros/cercanias/bilbao/index.html
Euskotren
http://www.euskotren.es/
1605
Bilbao Bus Station
Termibus Bus Station
http://www.termibus.es/index.php?idi=es
1606
Bilbao Train Station
The Renfe station is Estación de Abando Indalecio Prieto.
The Renfe FEVE station is Abando Concordia and is located adjacent to the Renfe Station.
Bilbao has three Cercanius light rail routes that intersect at Abando.
Euskotren Transvia Tram and Bilbao Metro have stops at Abando.
Bizkiabus and Bilbobus have stops at Abando.
Bilbao Abando Indalecio Prieto Renfe Station
http://www.adif.es/es_ES/infraestructuras/estaciones/13200/informacion_000034.shtml
Bilbao Abando Wikipedia
http://en.wikipedia.org/wiki/Bilbao-Abando
1607
Bilbao Train Service
Renfe
http://www.renfe.com/
Renfe FEVE (Bilbao to Santander and Bilbao to Leon)
http://www.renfe.com/EN/viajeros/feve/index.html
Euskotren (Bilbao to Hendaye)
http://www.euskotren.es/
1608
Destinations from Bilbao
Euskotren to Hendaye;
Bus to Bayonne, Pamplona, San Sebastian, Burgos, Logroño,
et Alia;
FEVE train to Leon and Santander; and,
Renfe train to anywhere Spain.
1660 Bilbao to SJPdP via Bayonne
1661 This section discusses transportation from Bilbao to SJPdP via Bayonne.
Index 1660
1662 Bilbao Airport to Bilbao Termibus
1663 Bilbao to Bayonne Bus Option
1664 Bilbao to Hendaye Euskotren Option
1665 Bilbao Airport to San Sebastian Bus Station
1666 Bilbao to Irun Bus Option
1667 Irun and Hendaye to Bayonne
1668 Bayonne to SJPdP
1662
Bilbao Airport to Bilbao Termibus
Bizkaia buses #A3247 travels from Bilbao airport to Bilbao Termibus where it terminates. Termibus is located in same area as San Mames station.
1663
Bilbao to Bayonne Bus Option
There are PESA buses twice daily (except Sunday) from Bilbao Termibus to Place de Basques Bayonne.
Chronoplus bus #5, 8, B, or N departs from Place de Basques to Gare de Bayonne.
PESA
http://www.pesa.net/pesa/public_home/ctrl_home.php
1664
Bilbao to Hendaye Euskotren Option
Take Metro from San Mames to Etxebarri Station or take Euskotren Transvia tram to Atxuri Station.
Euskotren commuter trains travel from Atxuri Station and Etxebarri Station to Hendaia station, co-located with SNCF Gare d'Hendaye France, where Euskotren tracks terminate. A transfer is required at San Sebastian Euskotren Amara station.
Euskotren
http://www.euskotren.es/
1665
Bilbao Airport to San Sebastian Bus Station
PESA connects Bilbao Airport (Loiu) to San Sebastian bus station hourly.
http://www.pesa.net/pesa/public_home/ctrl_home.php
1666
Bilbao to Irun Bus Option
See Bilbao Termibus for schedule of buses to San Sebastian bus station.
Termibus Bus Station
http://www.termibus.es/index.php?idi=es
The San Sebastian bus station is an outdoor bus stop located at Plaza de Pio XII beside the Hotel Amara Plaza.
Bus companies providing service in San Sebastian:
http://www.donostiasansebastian.com/autobuses.html
Ekialdebus provides interurban bus service from San Sebastian including service to Irun and San Sebastian Airport.
http://www.ekialdebus.net/inicio/?lang=es
1667
Irun and Hendaye to Bayonne
SNCF TGV and Intercites trains travel from Irun Renfe Station to Gare de Bayonne.
SNCF TGV, Intercites, and TER trains travel from Gare d'Hendaye to Gare de Bayonne.
Trains continue to destinations such as Bordeaux and Toulouse.
ATCRB buses travel from Gare d'Hendaye to Place de Basques Bayonne.
Chronoplus bus #5, 8, B, or N departs from Place de Basques to Gare de Bayonne.
SNCF
http://www.sncf.com/en/passengers
Transdev ATCRB
http://www.transports-atcrb.com/
1668
Bayonne to SJPdP
SNCF TER trains #62 travel from Gare de Bayonne to SJPdP where it terminates.
SNCF TER Aquitaine
http://www.ter-sncf.com/Regions/Aquitaine/fr/Default.aspx