| Airlines | Age Based Defined Category | Maximum No of Passengers Booked Online on one PNR |
| American Airlines | Adults (12+)
Children (2-11) |
7 |
| Delta Airlines | NA, only ‘passengers’ mentioned | 9 |
| United Airlines | Children (2-4)
Children (5-11) Children (12-14) Children (15-17) Infants on lap Infants (under 2) Adults (18+) Seniors (65+) |
9 |
| Southwest Airlines | Adults (2+)
Seniors (65+) |
8 |
| Frontier Airlines | Lap Infants (under 2)
Children (under 15) Adults |
9 |
| Spirit Airlines | Children (0-17)
Adults |
9 |
| Alaska Air | Children (under 2)
Children (2-17) Adults (18 and above) |
7 |
| Hawaiian Airlines | Children (2-11)
Adults |
7 |
| JetBlue Airlines | Lap Infants (under 2)
Children (under 14) Adult |
7 (without lap infants)
+ Max 3 lap infants (one per adult) Max 3 children without adults in a flight, with total not more than 7. |
As can be seen that different airlines have their own ways of segregating passengers on the basis of their age groups. Their policies are tailor made according to this distinction. Therefore, if you have plans to fly with any of the US airlines above, you shall know the policies of airline with respect to each age group passenger.