Rethinking airline miles strategy with the Points Guy

Earning and using airline miles used to be simple. Fly 25,000 miles and earn a free flight. It is not so simple anymore.

The process of redeeming miles is changing in a way that makes it more difficult for all but elite fliers to earn rewards.

One key change: Delta Air Lines' announcement in mid-July that its SkyMiles rewards will be based on what you spend, rather than on the distance you travel, and the cost will be based on demand rather than a fixed amount.

Experts like Brian Kelly, known as the Points Guy (thepointsguy.com), expect more major airlines to follow suit.

Reuters asked Kelly for his advice for travelers.

Q: Are airlines suddenly being less loyal to their loyal customers?

A: The real answer is that loyalty is being redefined.

Basically, the wealth gap is increasing between economy and first class, which I guess makes sense as the industry keeps changing.

Q: It seems like all the airlines are treating miles like currency, and devaluing them.

A: Pretty much. Every month there are billions of points and miles pumped into the system. But there are just not that many flights, or hotels for that matter, so they are looking for ways to have you redeem more miles and points for less value, and I don't see that changing.

Q: What airlines are the most generous to their frequent fliers right now?

A: It really depends on where you live and how much you fly, but I still think American Airlines has the best top-tier elite status. American is also the most generous, in my opinion, with international upgrades, giving eight systemwide upgrades, vs. six on United.

A: The biggest thing is don't put all your miles in one basket. You should get a credit card that allows you to transfer to multiple programs.

You can be loyal to one airline, but don't overexpose yourself because that program will probably change or that airline won't fly where you want, so it's good to have points in all different programs.

Q: Is it even worth it to try to accumulate points with credit cards?

A: Always do the math. If you're not getting at least 1 to 2 cents per mile in value, you should really just think about getting a cash-back card. Also, don't always think that airline mileage cards are the best value. Sometimes cash is king.

Q: What strategy should consumers employ for travel this fall?

If you are spending a lot of money on short flights, you should take a look at Delta and United and the programs that reward based on money.

If you're an economy traveler, especially international, you're going to lose big time, so do the math and choose a program that rewards you the most.