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How do I add a minor to my Frontier flight?

If you'd like to add a child to an existing booking, you'll need to chat with us. Frontier Airlines will no longer accept children traveling alone under the age of 15 years of age.



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If you wish to include an additional traveler, you will need to make a separate booking.

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Minors traveling with one parent or someone other than their parents must have proper documentation. If the minor child is traveling with one parent, the traveling parent must have: The child's passport. A copy of the child's birth certificate.

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You can't add someone to your ticket - you'll have to just purchase a new ticket for that person at the going rate of the day. You won't be on the same itinerary, but you should be able to link them as traveling with you - or your travel agent can or airline rep. Is it difficult to find a luxury travel agent?

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How do I add my Known Traveler Number (KTN) to previous reservations? Contact your airline by phone or online to add your Known Traveler Number (KTN).

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You can also update existing reservations with your TSA PreCheck number. Go to Edit Traveler Information in the Manage Reservations section on the website, at an airport kiosk or in the United app.

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Who can fly alone? Most U.S. airlines will permit children who have reached their fifth birthday to travel unaccompanied. Kids ages 5 through 11 who are flying alone must usually travel pursuant to special “unaccompanied minor” procedures.

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If you still do not have a TSA PreCheck indicator on your boarding pass, please call the TSA Contact Center at (866) 289-9673, submit an online form, or contact us at @AskTSA on Twitter and Facebook Messenger.

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Yes, you will. I did the same thing a few months ago. My old TSA KTN will expire soon, but for the last 6 months or so, I've had two KTNs (Known Traveler Number). I've used the overlap period to make sure all of my travel accounts are updated with the new number to insure a smooth transition when my old one expires.

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Frontier's Seating Policy At least one adult flying with a child under the age of 14 will automatically be seated next to them without having to pay an additional seating fee. They must be on the same reservation for fee-free adjacent seating. Efforts to implement this policy have been in effect since October 2022.

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Planning your trip
  • Infants on lap. Children under two can sit on a parent's lap during flights to any destination.
  • Infant seats. Alternatively, infants can have their own seat if you bring an approved car seat.
  • All other kids. Children older than two will need a ticket and their own seat on the plane.


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International Travel. Regardless of age, all children need a valid passport for air travel to another country. The application process for children under the age of 16 needs to be completed in person. To fill out this application, at least one parents needs to appear.

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Child Ticket Age and Price Most airlines count any person between the ages of 2—11 as a child. You're required to purchase a seat for children, although in most cases they're considerably cheaper than the price of an adult ticket (between 25—33% cheaper).

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