Many travelers are a member of at least one airline frequent flyer program — and lots are members of multiple airline loyalty programs. And the membership numbers keep growing, as well as the ...

U.S. News' in-depth guide to Delta SkyMiles. Find out the pros and cons, how to use points, plus membership benefits and more.

American Airlines said it will keep thresholds to earn frequent flyer elite status steady for a third consecutive year. United Airlines and Delta Air Lines also kept requirements the same for the ...