Time to pay for that second piece of luggage

United Airlines and US Airways Group, Inc. will begin charging $50 round-trip for checking a second piece of luggage on May 5. Other airlines may follow, eager to collect hundreds of millions of dollars without raising ticket prices.

Will customers agree to giving up the basic airline cost of checking in two bags without additional fees?

After May 5, if you brought in a second bag which is overweight and oversized, you would have to pay $450 at United Airlines. At Delta, a third checked suitcase which is overweight and oversized will knock you back $660.

Is two bags a reasonable expectation? With security rules limiting liquids as well as decreasing reliability of your luggage being able to reach your destination in one piece, customers want two.