How much time can I change my flight?

Most airlines -Including Low-cost carriers- allow you to change your flight dates/times up to 24Hrs from the scheduled departure time. these changes usually require a fee to be paid, but they can also be free of charge.

Most low-cost / Budget carriers don’t allow any changes within 24Hrs from departure times.

There is no solid rule. You have to contact the airline or the travel agency to know, or you can go through your ticket rules.

The cost of changing or canceling a flight will vary by airline. Here we’ll break it down and offer some tips for avoiding change and cancellation fees altogether. The cost to change or cancel a flight depends upon the specific details of an airline’s policy, which vary by airline. In some cases, you can make changes to your itinerary with no fee.