Different airlines have different domestic airfare. The airfare depends on the destination. The airfare is usually fixed however the airlines do change them if there is too much of rush. The airfare is reduced generally during the off-season or during those hours of the day when there's not too much of traffic.
The tickets are put up for sale on all the airlines websites. The discounted rates are also put there so that you can choose the best option. There are a number of low cost carriers today in the market. This has increased the level of competition. A traveler today has the choice to fly at cheaper rates than those offered by the top airlines. This is primarily due to the fact that low cost carriers offer very reasonable rates.
Domestic tickets can also be purchased from some travel sites. These sites work together with various airlines and offer discounted rates. The rates may actually be less than what is offered by the airlines. There are some travel sites which are based on search engines. They display all the information available by visiting the sites of almost all the airlines. This is yet another way to buy domestic air ticket.
You can buy a cheap ticket through online shopping. There are the flight search engines like Sidestep.com, Kayak.com, SmarterTravel.com and Bookingbuddy.com. There are also the conventional sites like Orbitz or Expedia. You should always check out the rates offered by these sites. After this, visit the airlines sites so that you can compare the rates and go for the best option. Travelocity and Expedia are actually travel agents who work online.
Search capabilities differ for each website. Orbitz and Expedia will search only their databases for the available flights, car rentals and hotel rooms. The options are thus restricted. However travel services and search features are better on these sites.
You can also get an air ticket at the price quoted by you. You have to enter your destination city and the price for which you will like to buy the ticket. Various airlines sites will be searched to see if they can offer the ticket on the price quoted by you. However you have to make adjustments for the flight even if it doesn't suit you.
With these options, domestic airfare has become much more affordable. This is the reason as to why more and more travelers across Europe and US are buying tickets online.