Join Date: May 1998
Location: Highland PArk,IL,USA -- AA Lifetime Platinum, IHG Plat, UA Silver, Hilton Gold, Radisson Gold, Marriott Lifetime Titanium
Posts: 2,367
Since you are looking at getting miles, it can be assumed you would like to use them.
From all the threads, and my experience with 3 Million miles in both DL and AA you are way better to accumulate AA miles. With DL, especially overseas, you will need to accumulate twice as many miles for awards. Read all the threads on DL about how difficult it it to use their miles. They just don't seem to have standard awards until it is so close to flight that you need to pay fees.
With AA it is WAY easier to use miles for awards.