Originally Posted by DOJETDRIVER
If it was up to me, any pilot who works for an airline should be able to ride on any other airline regardless of country. I'm glad that the Spanish extend this courtesy. However, I think it's all the other European airlines who are resistant and not US airlines. The US TSA maybe, but not the airlines.
Its not TSA it is the airlines. They don't want to be faced with fines for an improper crewmember trying to enter the US. US pilots can't jump seat to the US from Europe do stringent TSA requirements under APIS, unless it is on their own carrier.