Feb 19 (Reuters) - United Airlines is revamping its frequent-flyer loyalty program to further reward travelers who carry a United co‑branded credit or debit card, while dialing back mileage earning for members who do not.

For decades, one of the perks airline travelers have enjoyed most is the ability to earn frequent flyer miles and redeem them for an award flight or other rewards. Whether you get them via a travel credit card, an airline loyalty program or both ...