But the % earned means nothing. If award flights are your objective it is earn to burn that matters. And you need to get enough ff miles to use before they expire.

Frequent flyer miles are not equal to earn or burn between ffp’s. 10,000 frequent flyer miles in 1 ffp may get you a longer award flight than 15,000 frequent flyer miles in another ffp. Each airline ffp has different rules for using (burning) those miles/points for awards and different copay/surcharge $$ fees. There are cash surcharges on award flights with some ffp’s/routes/airlines. Award surcharge can be/are different. Real taxes on award flights are the same for all airlines for the same route and class. A surcharge can trigger additional real taxes if the flight changes from a non revenue flight to a revenue flight.

The airline you fly most or an airline of the country you live is the best ffp for many people. Generally you are better earning on your primary airline due to greater recognition, better service when disruptions, ability to upgrade flights and possible operational upgrades and able to earn ff miles from non flying activities, like credit cards.

AS is a good ffp.