On June 12, 2013, American will be launching daily service between Miami and San Diego, and to celebrate they’re offering bonus miles for those that register and fly the route by September 15, 2013. They’re offering triple base miles for paid first class and double base miles for paid coach.
You don’t actually have to be originating and terminating in Miami and San Diego to take advantage of this — you can book it as part of a larger itinerary, and the nonstop legs between Miami and San Diego will qualify for the mileage bonuses.
As of now nonstop fares aren’t great — about $384 all-in roundtrip. Hopefully they get better or someone comes across a creative itinerary that includes these segments.
Registration is required prior to travel using promotion code SAN3X.
(Tip of the hat to AAdvantageGeek)