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.
For domestic flights to/from Galapagos, each passenger is allowed to bring one piece of luggage of no more than 20 kilos plus one hand luggage or backpack of no more than 10 kilos. Each passenger can also brink on plane’s cabin 1 small purse, handbag or camera-bag.
If excess on luggage occurs, the fee will be charged and paid directly at airline’s counter at the moment of check-in after checking space on cargo area on the plane to Galapagos.
It depends especially on the level of comfort and facilities on board you are looking for: