Download WhichAirline Flight Search chrome extension. Easily find the best flight in unique visual interface. Search all airlines (low cost included!) as well as all major travel agents. and install in your Google chrome browser. This is Direct WhichAirline Flight Search Crx download for Chrome it is also called WhichAirline Flight Search offline CRX for chrome Download. This WhichAirline Flight Search is used to Easily find the best flight in unique visual interface. Search all airlines (low cost included!) as well as all major travel agents.