Mileage Question

Hi everyone,

I'm wondering if someone could answer the following question:

I'm flying YYC-YYZ-BOS return (on AC - crediting to A3). Fare class is L on all legs. According to the charts, L (domestic on AC - the YYC-YYZ portion) only gives 25% on A3, and the YYZ-BOS flights receive 50%.

My question is whether it is "piece-mealed" like that or, because the trip is going from Canada to the US, whether I would receive 50% miles (on A3) for the entire distance.

I'm reasonably close to *Gold on A3 (@ 1600 miles), but have no control on fare class in this instance. If the fare is compartmentalized, I think I come up short; if I receive 50% on all legs, I think I make it...

Any assistance would be appreciated.

Cheers,

Singlepoint