The cost to change a flight with Aeromexico depends on the type of ticket purchased, the timing of the change, and whether there are any fare differences between the original and new flights. Aeromexico offers various fare classes, each with different rules for changes. For passengers who have purchased a "Basic" fare, changes typically come with a fee, as these tickets are the most restrictive. If you need to change a "Basic" fare, the airline may charge a change fee that can range from $50 to $200 USD. In addition to this fee, passengers will also need to pay any difference in fare if the new flight is more expensive than the original. If the new flight is cheaper, the airline usually does not offer a refund for the price difference.

For those who have purchased a more flexible fare, such as "Economy Flex" or "Premier Flex," the change fees are generally lower, or in some cases, the fee is waived entirely. These fares are designed to provide passengers with greater flexibility, so if you need to change your flight, the process is typically smoother and less expensive. In many cases, the change fee may be reduced or even eliminated, but you will still be responsible for paying any fare difference if the new flight is more expensive. On the other hand, if the new flight costs less, Aeromexico may provide the difference as a credit toward future travel, depending on the ticket terms.

The timing of the change also plays a significant role in determining the cost. If changes are made well in advance, such as several days or weeks before departure, the fees are often lower. However, if you need to change your flight closer to the departure date, particularly within 24 hours of the scheduled departure, the change fee can be higher, and there may be fewer options available for rescheduling. In such cases, the airline may also apply restrictions on availability, meaning you may have to choose from fewer flights.

If the change is made due to an emergency or an unexpected event, such as illness or family matters, Aeromexico may consider waiving the change fees or offering reduced fees, but this is usually determined on a case-by-case basis. Passengers will need to contact Aeromexico customer service to explain their situation and potentially provide supporting documentation. If the airline agrees to waive or reduce the change fees, you may still need to pay any fare difference if the new flight is more expensive.

In contrast, if Aeromexico changes your flight due to reasons within the airline's control, such as cancellations, schedule changes, or operational issues, you are generally entitled to a full refund or rebooking without any additional charges. If the airline cancels your flight, you will not be charged a fee to change to a different flight, and you can either receive a refund or be rebooked on the next available flight at no extra cost.

In conclusion, the cost to change a flight on Aeromexico depends on the type of ticket purchased, the time the change is made, and whether there is a fare difference. Basic fares tend to have higher change fees, while more flexible fares allow for lower or no fees. If the airline changes the flight, passengers are entitled to rebooking or a refund without additional charges. It is always a good idea to check your specific ticket’s terms and conditions when booking to understand the exact rules and fees that apply to flight changes.