Both American and Delta are offering triple redeemable miles on their premium transcontinental flights between New York and Los Angeles/San Francisco. Registration for both versions of the promotion is required by December 15 for travel through December 31.
For American’s promotion, the following fare classes qualify: F, J, Y, D, I, A, P, H, K, M.
For Delta’s promotion, the following fare classes qualify: J, C, D, S, I, Y, B, M.
In other words, all premium cabin revenue tickets and very expensive coach tickets qualify.
This is by no means mileage run material, but if you’re flying a transcon in a high fare class anyway (hopefully on someone else’s dime, for your sake!), this is definitely something to register for.