Allowed for route changes from Domestic to Domestic or International to International. Changing from Domestic to International routes is not permitted.

Ex.

• In case of modifications, the change must be made per segment to an equal or higher available fare class and value.
• Changes to a lower value and fare class than the one originally issued are not permitted.
• If there is a residual amount due to the route change, that amount is not refunded.
• The rate prevailing on the day of reissue must be applied, maintaining the fare family. 
• The reissue must be performed as an Exchange. 
• The original ticket is relinquished as a form of payment for a new ticket (total by total). 
• The applicable penalty will be the one corresponding to the segment(s) to be modified.
• The penalty must be reflected through the YR tax, except for US agencies with Amadeus and Sabre systems in which the penalty is reflected through the CP tax, both of which are non-commissionable and non-refundable.