It is safe to say that people whose credit cards are overdue can buy air tickets. However, the process of purchasing air tickets may be subject to some restrictions and challenges. The following is a detailed explanation:

First, when purchasing air tickets, airlines will evaluate passengers' credit. Even if your credit card is overdue and blacklisted, airlines usually don't directly check the blacklist information, but judge your credit status according to your credit score. If your credit score is low, the airline may restrict your right to purchase tickets or require you to provide additional deposit.

second, even if you buy a plane ticket, you may encounter difficulties in refunding it. If your credit card overdue blacklist is still valid, the bank may limit your refund channel, which will make it difficult for you to refund your card. In addition, airlines may impose stricter restrictions on the refund policy of blacklisted customers.

thirdly, the blacklist of overdue credit cards may have other effects on your travel. For example, you may be restricted by higher travel insurance fees, car rental companies or hotel reservations. These factors may increase your travel costs or limit your travel flexibility.

conclusion: people whose credit cards are overdue can buy airline tickets, but they may face some restrictions and difficulties, including airline credit evaluation restrictions, refund difficulties and other travel effects.

Extended information: Blacklist usually refers to the list of a person who has been included due to a bad credit record. The blacklist of overdue credit cards is maintained by the basic database of personal credit information of the People's Bank of China, which contains bad credit records such as overdue, arrears and default. The existence of blacklists aims at punishing individuals who have broken their promises and preventing them from obtaining credit or other financial services again.

although the blacklist of overdue credit cards will have some impact on the purchase of air tickets and travel, it does not mean that air tickets cannot be purchased at all. In practice, each airline and bank has different policies and restrictions, and specific issues need to be consulted according to individual circumstances. In addition, sometimes the problems that may occur when purchasing air tickets may also be different due to personal credit status and ticket purchasing channels. Therefore, when faced with the overdue blacklist of credit cards, it is recommended to communicate with airlines or related financial institutions in time to understand the specific situation and solutions.