After booking Garuda Indonesia ticket, if you are eligible, you will receive an invitation email.
Determine the amount you are willing to pay to upgrade. Offers must be made per flight segment and per passenger listed in the booking information (i.e. flight from Bengkulu to Bangkok consists of two segments: Bengkulu to Jakarta and Jakarta to Bangkok).
Enter your payment card details to allow payment only if your offer is successful (unsuccessful offers will not be billed).
Review your information and submit your offer. Submission and/or modification can be made 4 days prior to departure.
You will be emailed about the success of your offer two days prior to departure.