2. Economy class tickets are oversold, but there are vacancies in business class, so high-end passengers who buy economy class tickets will be upgraded free of charge, and economy class seats will be available for oversold passengers.
3. In order to prevent oversold passengers from claiming compensation, oversold passengers are upgraded.
Change the price difference of the lower cabin in the air ticket to the price difference of the higher cabin, or change the price difference of the low discount air ticket to the high discount air ticket or to the full price air ticket. The same discount is gone, but when the ticket needs to be rescheduled, the upgrade procedure will usually be done first.
Generally speaking, most people who can enjoy this service are airline members, such as China Eastern Airlines "China Eastern Airlines Miles" and Dragonair "Zuncui Club".
Extended data
First class and business class fares
In order to adapt to the development of the domestic air transport market, the Civil Aviation Administration and the National Development and Reform Commission decided that since June 20, 2000, the first class and business class fares of civil aviation domestic routes will be subject to market adjustment, and the transport airlines will set their own prices.
Price category, level and applicable conditions (including the number of seats in first class and business class, the difference with economy class, supporting facilities and service standards, etc.). The domestic routes of different transport airlines will be different.
The airline handles the upgrade.
China Eastern Airlines
1, BSP upgrade and transfer: it must be a one-way ticket of normal class, with the same name, certificate and itinerary, and the upgrade fee is greater than the change fee. The original coded plane must be cancelled two hours before departure, so that it can't be in a state of missing the flight.
2. According to the supplier's review, you can submit an upgrade to make up for the difference. Note: This passenger upgrade regulation is for reference only, subject to the authority of the agent. Please consult customer service or submit a change application before upgrading.
Air China CA
1. The upgrade and replacement of the cabin shall be authorized by each agent. Please consult customer service or submit an application for cabin change before handling.
2. It is suggested to contact Air China customer service to pay the difference by credit card, or submit the upgrade to make up the difference, which will be reviewed by the supplier.
Baidu Encyclopedia: Upgrade, CAAC