The nearest airport to St Jean is Biarritz.
Biarritz to St Jean (and/or Roncesvalles):
http://www.sncf.com - Train from Biarritz (and Bayonne) to St. Jean Pied de Port ± 1hr50 mins. The last train leaves Bayonne at 18:13 and gets in StJPdeP at 19:35.
Or, you can take the #6 bus from the Biarritz airport to the Bayonne train station. It leaves about every 30 minutes and takes about 45 minutes. Complete bus schedule here:
Express Burricot taxi to Roncesvalles. 06-61-96-04-76 or book ahead: Email:
apcaroline@hotmail.com
Biarritz to Pamplona: Train to Irun and then to Pamplona:
The nearest airport to Roncesvalles is Pamplona - about 50kms away.
18h00 bus cost about 4 euro and takes about 1 hour.