Vietnam Airlines provides a user-friendly web check-in service to enhance the convenience of your travel experience. Here are the essential details along with relevant keywords: Web Check-in Timeframe: Web check-in is available from 24 hours up to 2 hours before the scheduled departure of your Vietnam Airlines flight. Easy Process: To complete the web check-in, input your departure and return destinations, along with the date and either the booking reference number or e-ticket number. Age and Document Requirements: For domestic flights, passengers aged between 12 and 70 years old are eligible for web check-in, provided they have valid travel documents. For international flights, web check-in is open to passengers aged between 18 and 70 years old, also requiring valid travel documents. Customization Options: Enjoy the flexibility to update your seat, add baggage, and select meals during the web check-in process. Boarding Pass: After completing web check-in, it's important to either print out your boarding pass or save it on your mobile device for easy access. Airport Check-in Option: If necessary, you still have the option to check in at the airport.