7. Why does the pay option appear after I log in to the manage booking option?
This option when you are looking to make modifications either of changing or canceling the flight ticket.
All the above FAQs are for Copa airlines manage my booking, if needed you can connect to the customer support specialist for the reservation process and another related query.
I have a reservation from Sao Paulo to Cancun with Copa Airline
Copa Airline 15.12.20 Sao Paulo flight CM 702, Panama 15.12.20 CM 324
I need to change the flight 14.12.20
Please reply and confirm