There are numerous airlines that fly to Ecuador, so finding cheap flights shouldn't be difficult. Flights to Ecuador are either to the capital city Quito, or to Guayaquil on the coast. Many people get a simple return flight in and out of Quito, when it usually better to buy an open jaw flight ticket into Quito, and back from Guayaquil, especially if you visit the Galapagos Islands at the end of your vacation.
International Flights to Ecuador
Both the capital city Quito, and the largest city Guayaquil, are served by various international airlines. Airlines that fly long haul to Ecuador invariably fly to both Quito and Guayaquil, and in some cases with the same aircraft touching down en route (e.g. KLM and Iberia). Prices are invariably very similar to both destinations, and open jaw flight tickets a distinct possibility with almost all airlines.
From USA and North America, airlines that have direct flights to Ecuador include Continental, American, Delta, Air Canada and LAN.
From Europe, KLM and Iberia are the two major airlines that have direct flights. Air Europa often codeshare flights with Iberia and are sometimes over £100 less than Iberia itself, so always check this option. The cheapest flights from Europe to Ecuador are usually with Air france via Paris and either Caracas or Bogota. Alternatively, consider checking prices with Avianca via Madrid and Bogota, or Lufthansa via Frankfurt and Caracas.
Flights from Latin America to Ecuador
Ecuador is also served by a range of other airlines flying from Latin American destinations. The most common flight hubs are Panama City and Lima. One can fly to Ecuador from almost anywhere in Latin America by changing planes in one of these travel hubs. Lan Ecuador is the national carrier, and has extensive flights to various destinations in North and South America. LAN offers an airpass for travel throughout varies countries in South America - see the article on the LAN South America Airpass for further info.
Lan Ecuador are the national airline, but they don't offer any domestic flights.
Tame has Ecuador's most extensive domestic flight routings, plus one international flight - to Cali in Colombia.
Tame route Map
Aerogal is an airline that primarily serves the Galapagos Islands (San Cristobal and Baltra Islands), in addition to other destinations in Ecuador including Quito, Guayaquil, Cuenca and Manta. Aerogal also flies to Colombia - Medellin and Bogota.
Icaro's hub is at Quito airport, from where they fly to Cuenca, Guayaquil, Manta, Loja and Coca (Ecuador's Amazon).
VIP Ecuador offers flights to Quito, Guayaquil, Lago Agrio (Amazon), Salinas (on the Pacific coast) and Coca.