How can I change a flight without paying a fee?

In the Modern days, everyone is multitasking in life. Anything can come in the way of your plans to travel, and you might want to make changes. Changing flights should not be a major concern on the list of things to worry about. Most airlines are overbooked, so they do give the option to the passenger to change flights without any additional costs because they do not lose out on revenue anyways. You can now change flights without payment with the tips mentioned here. 

• You can change flights by opting for airlines that support a change of flight without any additional charges. 
• Booking a flight on a certain weekday might be an option as on some days the fee is lower as compared to other days, and when you change flights, there won't be any difference in the amount to be paid.
• If you are uncertain about the flight, you should change the flight within 24 hours of booking, as you can change it for free.
• You can get options to change flights without paying a fee by calling up the airlines' customer service team and asking for alternate options that you may have.
•  You can take up the airline's frequent flier program offers and become a member and enjoy the benefits of changing flights without paying a fee.
• Use your travel vouchers/credits to change flights without paying a fee.
• If the reason for changing the flight is due to an emergency, most airlines support you in changing your flight without any additional charges. 

It is not impossible to change a flight without payment, as keeping these options in mind will help you do that. You do not have to hesitate to make a reservation with an airline just because you are not a hundred percent certain that you will be able to follow through with the commitment and would want to make changes.

Source: How to change my flight without fee?