Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Qatar to Galapagos as you normally would.
Related info for your journey
Useful info, stats and facts about Qatar to Galapagos flights.
These are just IATA (International Air Transport Association) codes. They are used in aviation to identify and differentiate airports. That’s why a Doha Hamad Intl Airport to Baltra Airport flight would often be abbreviated as a DOH to GPS flight. San Cristobal Airport (SCY) are some additional IATA codes for airports related to your trip.