When you are about to prepare for a plane trip, organizing and carrying important documents is an important step to ensure you have a smooth and hassle-free trip. Below is a more detailed analysis of the documents you should bring with you when flying:

1. Passport:
- For international trips, a passport is an indispensable item. Please carefully check your passport's expiration date to ensure it is valid for the duration of your intended trip.
- If you travel domestically, an identification card or identity card will be an alternative proof of identity.

2. Airline tickets:
- Airline tickets are proof that you have made a reservation and have the right to board the plane. You can get your tickets via email or from the airline's mobile apps.
- If you have checked in online, you will receive a boarding pass, but if not, you need to go to the check-in counter to receive your boarding pass.

3. Boarding pass:
- Boarding pass is one of the most important documents when flying. You can print it before arriving at the airport or store it on your smartphone.
- If you store your boarding pass on your phone, make sure the phone's battery is enough to last the entire trip.

4. Identification card or identification document:
- For Vietnamese citizens, identification card is the most important document proving identity. If you are a foreigner, bring your passport or other replacement document.

5. Visa (if needed):
- Before going, check to see if the country you are visiting has visa requirements. If necessary, prepare visas or other relevant documents.

6. Hotel booking form or information related to accommodation:
- Bringing a hotel booking form or information related to your accommodation will help you easily check into the hotel upon arrival.

7. Documents related to the trip:
- Includes insurance documents, tour information (if any), list of important addresses and contact phone numbers.
- Additionally, if you carry other important documents such as insurance documents, make sure they are kept safe and easily accessible when needed.

Remember to check the regulations of the airline and your destination country to ensure that you have all the necessary documents and are in compliance with all regulations. This will help you avoid unnecessary problems and enjoy your trip to the fullest.