Delta and Northwest (NWA) announced today that it will be merging with Northwest Airlines. Delta, currently the third largest airline in the country, will become the world’s largest airline when it merges with NWA, who is currently the 5th largest. Many are worried that this will result in higher prices because there will be less competition. This notion is hightened by an anticipated merger between Continental and United Airlines. It is believed that in just a few years, there will be only three major airlines left. We’ve already said goodbye to SkyBus, ATA, and Aloha Airlines, and Frontier filed for bankruptcy protection last week as it attempts to fix its financial woes.