Comparing fly2/get 1 free tix promos?
It seems that AA,Delta,United offer alike fly2/get 1 fee tix promos to/from NY and Boston from CA and FL. AA seems to require a Saturday night stay, has special low rates , plus has 5,000 mile bonus promo. Delta does not require Saturday night stay, nor non-stop flights. U does not allow a Saturday night stay.
Have you seen a comparison in more detail? Any other airlines? Which one do you think is the best promo(not considering the destination of the award tix)?