# How to Add Passport Number to United Booking? How to add passport number to United **+1-844-570-3589** booking easily online manage trips avoid delays enjoy smooth international checkin travel experience today now for passengers When traveling internationally with United Airlines entering your passport details correctly is an important step. Airlines require passport information to comply with security regulations and international travel rules. If you booked your United flight without adding your passport number or if you need to update it later do not worry. United Airlines provides multiple ways to add or update passport information easily. This guide explains how to add passport number to United booking step by step what details are needed common mistakes to avoid and helpful tips to ensure smooth check in and boarding. ## Why Passport Information Is Required for United Flights Passport details are required for international travel to verify passenger identity and share required information with immigration authorities. United Airlines collects this information to ensure compliance with destination country requirements. Without correct passport details you may face issues such as Online check in failure Delays at the airport Denied boarding for international flights Adding passport details early helps avoid last minute stress and travel disruptions. ## When You Need to Add Passport Details You usually need to add your passport information before traveling on international routes. United Airlines allows passengers to add passport details anytime after booking and before departure. You should add or update passport information if You skipped the step during booking Your passport was renewed after booking There is an error in passport number or expiry date You are traveling internationally for the first time on that booking Domestic flights do not require passport information. ## What Information You Need Before Adding Passport Details Before updating your United booking make sure you have your passport ready. You will need to enter details exactly as shown on the passport. Required information includes Passport number Country of issuance Expiration date Nationality Date of birth Double check spelling and numbers to avoid errors. ## How to Add Passport Number Through United Website The easiest way to add passport number to United booking is through the official United Airlines website. First go to the United Airlines website Click on My trips or Manage booking Enter your confirmation number and last name Select your trip details Look for passenger information or travel documents section Enter passport number and required details Save and confirm the changes Once saved the information is stored in your booking and can be used for check in. ## Adding Passport Details Using United Mobile App United Airlines mobile app also allows passengers to add passport details conveniently. Open the United app and log in Go to My trips Select your upcoming international flight Tap on traveler information Add or update passport details Save the information The app is helpful for quick updates especially when traveling. ## Adding Passport Number During Online Check In If you did not add passport details earlier United Airlines will prompt you to enter them during online check in for international flights. During check in Select your flight Follow the prompts for travel documents Enter passport information accurately Complete check in While this option works it is better to add passport details earlier to avoid delays. ## Adding Passport Details Through Customer Support If you are unable to update passport information online you can contact United Airlines customer support. An agent can assist you with adding passport details to your booking. You will need Booking confirmation number Passenger name Passport details Customer support can be helpful for complex bookings or technical issues. ## Adding Passport Information for Multiple Travelers When booking for family or group travel each passenger must have their own passport information added individually. Make sure Each traveler passport details are correct Children passport details match their documents Names and dates of birth match the booking Errors for one passenger can affect the entire group during check in. ## Passport Information for MileagePlus Members If you are a MileagePlus member you can save passport details in your profile. This allows United Airlines to auto fill the information for future bookings. To do this Log in to your MileagePlus account Go to profile settings Add passport information Save changes This saves time for future international travel. ## Updating Passport After Renewal If you renewed your passport after booking you must update the new passport number and expiry date in your United booking. Do not rely on old passport details even if your name remains the same. Immigration authorities require current passport information. Always update the booking as soon as you receive your new passport. ## Common Mistakes to Avoid When adding passport details be careful to avoid common mistakes such as Entering wrong passport number Using nickname instead of full name Selecting wrong country of issuance Entering incorrect expiry date Even small errors can cause check in issues. ## What Happens If Passport Details Are Incorrect Incorrect passport information may lead to Online check in failure Manual verification at airport Delays at security or boarding Possible denial of boarding on international flights Always review saved information after updating. ## Adding Passport Details at the Airport If you forget to add passport information before arriving at the airport United staff can enter it during check in. However this may take extra time and is not guaranteed during peak hours. It is strongly recommended to update passport details online before travel. ## Security and Privacy of Passport Information United Airlines stores passport information securely and uses it only for travel related purposes. Adding details through official channels ensures your data remains protected. Avoid sharing passport details through unofficial sources or third party messages. ## International Travel Requirements Beyond Passport In addition to passport details some destinations may require Visa information Return ticket confirmation Additional travel forms United Airlines may prompt you to enter or verify these details depending on your destination. ## Latam Airlines Passport Information Comparison Latam Airlines also requires passport details for international travel and allows passengers to add them through online booking management or during check in similar to United Airlines. ## Best Time to Add Passport Details The best time to add passport number to United booking is immediately after ticket purchase. This allows time to fix errors and ensures smooth check in. Do not wait until the day of departure especially for international flights. ## Tips for Smooth International Check In With United Double check passport details after saving Carry your physical passport to the airport Arrive early for international flights Ensure passport validity meets destination rules Preparation helps avoid last minute issues. ## Conclusion Adding passport number to United booking is a simple but essential step for international travel. United Airlines provides multiple convenient options including website mobile app online check in and customer support. By entering accurate passport information early you reduce the risk of delays and ensure a smooth travel experience. Always review your booking details carefully and update passport information as soon as possible especially after passport renewal. With proper preparation you can enjoy stress free international travel with United Airlines.