Baggage check thru?

My son is flying from San Juan ,Puerto Rico to Albuquerque, New Mexico…His first leg is from SJU to EWR on Continental Airlines …In EWR his next leg is on American Airlines to Dallas/Fort Worth and there he stays on American to his final destitnation of Alburquerque, New Mexico… My question is will his bags be transfer by the airlines thenselves or does he has to claim his baggage in EWR and Transfer baggage himself to American Airlines flight to Dallas/Fort Worth…Thanks for any help on this subject!!! :question: :question: :question:

If all his flights are on the same booking then Continental should check the bags in through to ABQ. If it’s not on the same booking, he can show the American booking to the agent at SJU and they will be able to check the bag in through to ABQ.