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A fare basis code (often just referred to as a fare basis) is an alpha or alpha-numeric code used by airlines to identify a fare type and allow airline staff and travel agents to find the rules applicable to that fare. Fare codes starts with a single letter, called a booking code or class, which matches the letter code that the reservation is booked in.〔(【引用サイトリンク】 title=The Cranky Flier, Fun with Fare Basis Codes )〕 Other letters or numbers may follow. Typically a fare basis will be 3 to 7 characters long. but can be up to 8. == Booking codes == Although airlines now set their own fare basis codes, there are some patterns that have evolved over the years and may still be in use. The first character is always a letter, and will match the booking code. Booking codes are the identifiers given by the airline's "revenue management" department, and allow the airline to control how many seats can be sold at a particular fare level. For example, a plane may have 25 economy seats still available and the airline may show it in a reservation system as
which indicates how many of each fare type can be reserved. Some codes cannot be sold by agents, and those seats may be reserved for international connections, loyalty programs, or airline staff relocation. Booking codes used to be standardized, and were defined by IATA. However, airlines have deviated from the IATA standard and current booking codes are airline specific. The same code may have quite different meanings for tickets issued by different airlines. Nevertheless, certain booking codes have fairly standardized meanings across nearly all airlines, and have had these meanings for many years: * F: first class * J: business class * Y: economy class * W: premium economy. This is a more recent addition to airline classes, intended as a mix of Economy and Business class features. The letter W is often used for this level. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Fare basis code」の詳細全文を読む スポンサード リンク
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