Many airline transfer partners can be found in the Marriott Bonvoy program. If you want to transfer rewards into the program to book an award, Marriott is likely your only choice.

A post in an online group with an email from Marriott stated that change is in the air. The 5,000 bonus points-to-miles incentive with American Airlines will end in four years. Marriott only sent the email to members who had transferred Marriott points in the past.

The program sent out a communication about the change on Monday, according to the program.

You can get a 5,000-mile bonus for every 60,000 points you transfer from Marriott to airlines. Transferring 60,000 Marriott Bonvoy points to AAdvantage would give you 25,000 American miles. The transfer bonus will end on October 31st. The effective transfer ratio will go down.

The 5,000 mile bonus per 60,000 points is ending for Avianca LifeMiles and Delta SkyMiles.

"Transfer your points to your frequent-flyer program and as a bonus, we'll add 5,000 miles for every 60,000 points you transfer to frequent flyer miles," reads the Marriott website.

There is no note about excluded airline programs. It's just a note that tells you to transfer Marriott points to other airlines. Marriott hasn't updated its website despite communicating changes to select members by email.

If you want to transfer Marriott points to airline miles, you need to know what to look for.

Analysis of this change

ZACH GRIFF/THE POINTS GUY

It seems odd that Marriott only dropped the transfer bonus for certain airline transfers. I wouldn't be surprised to see more airlines added to the list of transfers that don't get a bonus.

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It can be difficult to earn American Airlines miles with Marriott points. Marriott Bonvoy and Bilt rewards points are the only major currencies that can be converted to American Airlines AAdvantage.

Since I prefer to redeem Marriott points for hotel stays, I don't think removing these bonuses will have much of an effect on me. I have considered transferring Marriott points to airlines before, for example, to get Korean Airlines miles, since no other major currencies transfer to Korean Air SkyPass.

Some loyalists may find more value in transferring Marriott points to airlines since Marriott Bonvoy is dropping all of its award pricing bounds. The current 5,000-mile bonus for every 60,000 points transferred will not be available in the near future.

I spent over 5 million Marriott points.

Bottom line

It's terrible to see a loyalty program remove perks. Marriott only sent out an email to some of its members about the change.

I think these are the first of many programs that will lose this bonus over time. Major rewards programs allow you to transfer points or miles to other airlines.

Marriott Bonvoy points can be transferred to American, Delta or Avianca quickly. We don't know when Delta and Avianca will end, but we know the bonus won't be offered. If you get an email from Marriott, you should forward it to tips@thepointsguy.com.