Tips for getting the best Airfare
The length of your trip can affect your ticket price. If you are planning a long trip that reaches beyond the maximum stay of a very discounted ticket, you will likely fork over more money for your air travels.
Some airfares are set up as weekend fares, therefore if you exceed the maximum stay you won't be eligible for the often heavily discounted weekend fares.
The same is true for other types of airfares. Many seat sales limit you to 21, or 30 day stays. When you travel internationally, you will likely pay more to stay longer (prices often rise after staying longer than 1 month, 2 months, 6 months, etc.). And a ticket that is valid for a stay of more than one year is exceedingly rare.
Tweaking your flights to match your airfare needs can mean implementing a plan that considers day of the week, or time of day.