US airlines charge to take second bag on flights

Most US carriers began charging $25 this week for coach passengers who want to check a second bag on domestic flights — instead of allowing two checked bags for free. Six US airlines also are raising the cost of checking a third bag to $100. There are exceptions for first and business-class passengers and for those with certain types of mileage rewards. And some airlines will waive the fee for international travel
Each bag must weigh less than 50 pounds, and its dimensions (length plus width plus depth) must be less than 62 inches.

Southwest is the only major US carrier to allow travelers to continue to check two pieces of luggage without charge, but the cost for checking a third bag is now $25.

It is not uncommon to see passengers at US airport terminals trying to magically transform three carry-on bags into one. But it's not easy with a golf bag or skis!