Plane tickets

We can buy plane tickets in various manners:

• agence of unspecified travel
• agence of an airline company
• by phone
• by Internet

Each year the percentage of plane tickets bought on Internet increases.
Several sites already exist to have the capacity to find flights dry at reasonable prices.
In general, companies propose programs of development of consumer loyalty allowing to acquire points which one can convert into free flights.

• The program of Skyteam
  Flying Blue (Air France - KLM, Aeroflot-Russian Airlines, Aeromexico, Alitalia, China Southern Airlines, Continental Airlines, CSA Czech Airlines, Delta Air Lines, Korean Air, NWA Northwest Airlines, Air Europa, Copa Airlines, Kenya Airways).
• The program Star Alliance
  (Air Canada, United, US Airways, Air China, Air New Zeland, ANA, Asiana Airlines, Austrian, bmi, Egyptair, LOT Polish Airlines, Lufthansa, Scandinavian Airlines System (SAS), Shanghai Airlines, Singapore Airlines, South African Airways (SAA), Spanair, SWISS, TAP Portugal, THAI Airways International, Turkish Airlines).

It is a profitable solution if you make at least four travels by years with the same company (or program). In the others solution, you must to take always the company to low the price (no black list, of course).