In the U.S., children under two can usually fly as lap infants on domestic flights, but everyone age two and older needs their own seat. International trips often charge taxes for infants.
Lap infant vs own seat
A child under two can travel on an adult's lap on domestic flights without a seat ticket. The FAA recommends a child safety seat for the best protection, which requires purchasing a seat for the child. International flights often charge a reduced fare and taxes for infants.
Seats and sitting together
If you book the lowest fare, seat assignment may be unavailable until check-in. Families often benefit from a standard fare with seat selection. Ask us to help with seating requests when you book.
Car seats and strollers
Most airlines let you check strollers and car seats for free, either at the ticket counter or the gate. A car seat approved for aircraft use can be installed in your purchased seat; check the label for FAA approval.
Documents
Children need passports for international travel, including infants. Some airlines ask for proof of age for lap infants.
Packing tips
- Carry snacks, wipes and a change of clothes in your personal item.
- Use feeding or chewing during takeoff and landing to help young ears.
- Download shows before you leave.
Frequently asked questions
Does my toddler need a ticket?
Children aged two and older need their own seat on U.S. airlines. Under two, you can hold a lap infant on domestic flights.
Can I take a car seat on the plane?
Yes, if it is FAA-approved and fits the seat. Otherwise you can check it, usually at no charge.
Keep reading
Last reviewed October 22, 2026. FlighTicketHub provides general information; confirm details with the airline before you travel.