trouble-free flight

例句：

1. 1.The airline offers a trouble-free flight service to ensure your comfort.
   该航空公司提供无忧飞行服务，确保您的舒适。
2. 2. This flight is free from any troubles and delays.
   这趟航班没有任何麻烦和延误。
3. 3. They chose this flight because it's worry-free and convenient.
   他们选择了这趟航班，因为它无忧且方便。