# How to Add Known Traveler Number to United Booking?

Learn how to add your Known Traveler **[phone]** Number to United booking quickly ensure TSA PreCheck access smoother security and stress free travel today easily

A Known Traveler Number is an important detail for travelers who want a smoother and faster airport security experience. If you are flying with United Airlines and already enrolled in a trusted traveler program, adding your Known Traveler Number to your booking can help you access TSA PreCheck benefits. Many travelers forget to add this number while booking and later wonder how to update it.

This guide explains how to add a Known Traveler Number to a United booking, why it matters, when to add it, and what to do if issues occur.

## What Is a Known Traveler Number

A Known Traveler Number is a unique number issued to travelers approved for trusted traveler programs such as TSA PreCheck or Global Entry. This number tells the airline and airport security that you are eligible for expedited screening.

When the number is correctly added to your United booking, your boarding pass may display TSA PreCheck, allowing access to faster security lanes at participating airports.

## Why Adding a Known Traveler Number Is Important

Adding your Known Traveler Number to your United booking can make your travel experience much easier. It helps reduce time spent in security lines and allows you to keep items such as shoes and belts on during screening in many cases.

Without the number attached to your reservation, you may not receive TSA PreCheck benefits even if you are enrolled. That is why it is essential to ensure the number is correctly entered before your flight.

## When You Should Add the Known Traveler Number

You can add your Known Traveler Number at different stages of your booking.

During the booking process
After booking through Manage Reservations
Before check in
Even after check in in some cases

The earlier you add the number, the better. Adding it well before departure gives the airline system time to process the information correctly.

## How to Add Known Traveler Number During Booking

When booking a flight on the United Airlines website, you will be asked to enter passenger information. This section usually includes fields for personal details such as name, date of birth, and Known Traveler Number.

Simply enter your Known Traveler Number in the appropriate field before completing the booking. Make sure the number is typed correctly, as even a small error can prevent TSA PreCheck from appearing on your boarding pass.

## How to Add Known Traveler Number After Booking

If you already booked your United flight and forgot to add your Known Traveler Number, you can still update it.

Log in to the United Airlines website
Go to the My Trips or Manage Reservations section
Enter your confirmation number and last name
Select passenger details or traveler information
Add your Known Traveler Number and save changes

After saving, review your booking to confirm the number is correctly listed.

## Adding Known Traveler Number Using the United App

The United Airlines mobile app also allows you to manage your booking easily. This is a convenient option for travelers who prefer using their phone.

Open the United app
Access your upcoming trip
Select traveler details
Enter or update your Known Traveler Number
Save the changes

Once updated, check your boarding pass closer to departure to confirm TSA PreCheck appears.

## Adding Known Traveler Number to MileagePlus Profile

One of the best ways to ensure your Known Traveler Number is always included is by saving it to your MileagePlus profile.

Log in to your MileagePlus account
Go to personal information or traveler settings
Enter your Known Traveler Number
Save the information

By doing this, United Airlines will automatically add your Known Traveler Number to future bookings made under your account.

## Verifying That the Number Was Added Correctly

After adding your Known Traveler Number, it is important to verify that it is correctly attached to your booking.

Check your reservation details
Look for the Known Traveler Number in passenger information
Confirm that your name matches your government issued identification

A mismatch in name or date of birth can prevent TSA PreCheck from being applied.

## When TSA PreCheck Does Not Appear on Boarding Pass

Sometimes travelers add their Known Traveler Number but do not see TSA PreCheck on their boarding pass. This can happen for several reasons.

The number was entered incorrectly
The name on the booking does not exactly match your ID
The airport or flight does not support TSA PreCheck
Random security screening selection

If this happens, double check your booking details and speak with a United Airlines agent if needed.

## Updating Known Traveler Number at the Airport

If you realize your Known Traveler Number is missing on the day of travel, you may still be able to update it at the airport.

Visit a United Airlines check in counter
Ask the agent to add your Known Traveler Number
Present valid identification if required

While airport updates are sometimes successful, they are not guaranteed. Adding the number in advance is always recommended.

## Special Considerations for International Flights

For international flights, adding a Known Traveler Number can still be helpful for departure airports that support TSA PreCheck. However TSA PreCheck benefits mainly apply to flights departing from United States airports.

Ensure that your passport details and Known Traveler Number information are accurate to avoid complications.

## Adding Known Traveler Number for Family Members

If you are booking for family members, each traveler must have their own Known Traveler Number. Children under a certain age may receive TSA PreCheck benefits when traveling with an eligible adult, but this depends on current security guidelines.

Always add the correct Known Traveler Number for each eligible passenger individually.

## Latam Airlines and United Codeshare Bookings

### Latam Airlines Codeshare Flights With United

If your United booking includes a codeshare flight operated by Latam Airlines, adding your Known Traveler Number should still be done through your United reservation. However TSA PreCheck eligibility may vary depending on the operating carrier and airport.

Always confirm traveler details on the primary booking platform to ensure information is shared correctly between airlines.

## Common Mistakes to Avoid

Entering the wrong Known Traveler Number
Using an expired trusted traveler membership
Name mismatch between booking and ID
Waiting until the last minute to update details

Avoiding these mistakes improves the chances of receiving TSA PreCheck benefits.

## How Long It Takes for Updates to Apply

In many cases, updates to your Known Traveler Number apply immediately. However sometimes the system may take a short time to refresh.

If you add the number and do not see TSA PreCheck right away, wait a bit and recheck your boarding pass closer to departure.

## What to Do If Problems Continue

If you continue experiencing issues after adding your Known Traveler Number, contact United Airlines customer support. They can review your booking and confirm whether the number is correctly attached.

Having your Known Traveler Number and identification ready can help speed up the process.

## Tips for a Smooth Security Experience

Always double check traveler details before travel
Arrive early even with TSA PreCheck
Keep your trusted traveler membership active
Save your Known Traveler Number in your airline profile

These tips help ensure a stress free airport experience.

## Conclusion

Adding a Known Traveler Number to a United booking is a simple but important step for travelers who want faster airport security screening. Whether you add it during booking, through the United website, mobile app, or your MileagePlus profile, keeping this information updated can save time and reduce stress.

By understanding when and how to add your Known Traveler Number and avoiding common mistakes, you can enjoy the benefits of TSA PreCheck on your United flights. Taking a few minutes to review your booking details before travel ensures a smoother and more comfortable journey from check in to takeoff.