First, you must get to Ecuador Mainland. Make sure you arrive to Quito or Guayaquil at least one day before your departure to the Galapagos; there are no direct connections with international flights and flights to Galapagos Islands depart from mainland Ecuador early in the morning from Quito and/or Guayaquil.
Visitors arrive by plane from Mainland (flight takes about 2 ½ hours) with three main Airlines: AVIANCA, LAN and TAME and arrive to Galapagos to one of its two Airports: One in Baltra Island and one in San Cristobal.
Galapagos is a top-destination for travelers, therefore cruises and tours are on very high demand year-around. It is recommended to arrange your trip at least with 6 months in advance to secure and guarantee your spots on the preferred trip.
Now, if you find the opportunity to visit the Galapagos before 6 months in advance, there is also the possibility to find cruise deals that may fill your expectations. However, if you leave your decision for the last-minute, you may not find what you were looking for a tour that will fulfill your expectations.