Now, to a record-shattering headline for u.S. Airlines. They've collected billions in baggage fees, more than ever before. could not expect relief soon. Reporter: It seems like the airline industry has been able to counteract of the rising costs of fuel and fewer passengers flying. The airline industry has posted a profit. A big reason for that, those bag fees. And this year, they're on pace to rake in $4 billion. From carry-ons, to oversized items, u.S. Airlines are raking in record revenues from the fees they charge on luggage. Used to take on a 50-pound bag for free. Now, it's $25, $30. I'm frustrated. Reporter: A new federal report says those fees, starting at $25, added up to $1.7 billion in just the first half of this year. The most ever. Topping that list, delta airlines, recording nearly $430 million. Number two, united airlines at $351 million. Fees are not going to go away. If anything, they're going to get higher. Reporter: These record-setting profits are a rare bright spot in an industry, sufferi sufferi suffering suburb lens from rising fuel fees. But luggage fees helped the airline rake in $288 million this year. In some cases, the fees, think should charge more for the tickets. Reporter: Despite the money those fees generate, one airline is take customer feelings to heart. The other airlines versus southwest. Reporter: This new ad from southwest is promoting their bags fly free policy, as a way to gain customer business. You got to give it up. Bags fly free. Reporter: Now, the airline industry says these added fees are actually beneficial to the consumer. This way, you only pay for what you use, instead of everything being included in the ticket price. One airline about to raise their prices, spirit airline. At $33, they already charge the highest prigs for a checked bag. But their $35 fee for a carry-on bag is expected to go up by thanksgiving. 100 per bag. 100 for a carry-on at thanksgiving? That's what they're expecting.