America is a big country and the only way to get from one place to another in a reasonable time is by air. Years ago, this was an expensive business as the major airlines could keep their prices high. Then along came the low cost carriers. At first, they were painted as cutting corners on safety. The marketers tried to persuade passengers not to abandon the traditional airlines. Fortunately price was the key factor and, when the cheap flights did not fall out of the skies, real competition on the most popular routes soon cut the profits of the major airlines. There have been bankruptcies and mergers. We call the "old" airlines "legacy" carriers, i.e. they have inherited the routes of the old airlines that have passed away. Today, the low cost carriers fly to all the major hubs and on many of the feeder routes. It's getting easier to find really cheap tickets.
When it comes to international flights, there's still a lack of full competition but the situation is improving. So long as you're prepared to fly to the right hubs where slots are allocated to international carriers with low fares, the cost of your overall journey can be kept affordable. That's why this site is so important. It allows you to compare pairs of offered prices so you can quickly see which is offering you the better deal. Just put in your start airport and destination, the preferred dates of travel, and wait a few seconds for the search results. A few minutes later, you can be weighing the advantages and disadvantages of all the different offers.
When doing the comparisons, remember that all the lower prices tend to be subject to terms and conditions. One of the most common is a limit on your right to cancel or change the flight times. So, before you confirm the purchase, make sure you can accept these limits. If you cannot, there are only two choices. Either you buy travel insurance against the risk of accident or illness disrupting your travel plans, or you pay more for a ticket that allows you to change the times of the flights.
You should also look out for the special deals. Many airlines offer last-minute deals when they have empty seats. If you have a few days available and some spare cash, you can often find bargain stay-aways. There are also discounts for the young, students, seniors and those who belong to some clubs and associations. If the flights are forced because of a death or serious illness in the family airlines will also offer discounts.