Would you like to know how old your kid must be to fly on Delta alone under the unaccompanied minor program? Kids younger than 4 years can't travel solo. Kids between the age of 5 to 14 years are expected to take the unaccompanied minor administrations given by the carriers. Travelers can book their trip on the web to fill the Delta Airlines Minor Travel Consent Form or with a telephone to contact the carriers as well as at the airport counter. An extra expense is charged for this as the kids are given unique help during the excursion, assist with preboarding, takeoff, and so on. Notwithstanding, youngsters over the age of 14 can decide to take these administrations, it is discretionary for them to book their ticket under this.