The pros of the budget airlines is that it is affordable and cost effective. It can give everyone a chance to take planes and experience this amazing transportation. In addition, it’s also safe, even though the ticket is cheap . Its safety is guaranteed just like in premium airlines ，so people can rest assured (放松). The con of the budget airlines is that the flights are often scheduled at night. It is not available for people who like to enjoy the clouds on the flight during the night. That’s a pity. Moreover, the passenger service is not as good as other premium or full service airline. For the sake of price, it can be understandable. Last but not least, there are a lot of promotions and sales of goods , maybe they just want to make additional revenue to cover their cost.