I'm moving to Chicago soon and will be flying to London probably about once a month. I'm trying to figure out what frequent flyer program and credit card rewards program would be best for me.

If only BA and AA had legitimate codeshare, this would be an easy decision. I'm currently leaning towards UA since BMI and Air Canada also offer flights to LON (though not non-stop), but Virgin is also appealing.

I don't know; I'm just curious what people's thoughts are.