I am wondering if anyone has any experience with Interline Baggage Agreements? Here is my problem:

I have booked flights on two different airlines. (Alaska & American) I will be flying into DFW, and have 1.5 hours between the two flights.

I have heard it is possible to have the first airline book my luggage all the way through to my final destination. However, when I just called Alaska, they told me it was at the whim of the check-in agent.

Does anyone know if there is a way to confirm in advance that my luggage will be checked all the way through? I am worried that 1.5 hours isn't enough time to claim checked luggage, recheck the luggage, and then make it through security and to the gate.

Any advice will be really appreciated!!