The highest value airline rewards program is a bit of a surprise

(NerdWallet) - Airline reward programs offer a simple proposition: If you fly with our airline a bunch, you’ll get paid back in the form of miles or points that can be used for future travel. Yet understanding how many miles you’ll earn, and how much these miles are worth, can be anything but simple. These reward programs drive a huge part of airlines’ business. For example, American Airlines AAdvantage members spent $1,220 on flights on average in 2019 compared to $408 fo