Car seats provide better protection and safety to infants and kids in case of an emergency. Frontier Airlines allows passengers to bring a car seat on board, given the fact that it meets the airline's requirements and should be approved by the airline. You should not have the question, "Does Frontier let you seat with your kids" as no airline can stop you from sitting with your kids, but you have to follow the safety rules and the car seat policy of the airline so that your safety and the safety of other passengers is not jeopardized. 

Frontier Airlines Car Seat Policy

• Infants under two years of age can occupy a seat with an approved car seat. You can hold your infant on your lap on the flight.
• If you have children over two years of age, they must occupy their own seats and may use a car seat that is approved for use on an aircraft.
• If you are wondering, "Does Frontier charge for Car seats', the answer is that the airline does not charge for Car seats. You can bring a car seat for free on board the aircraft.
• The passenger has to purchase a seat for the child to use the car seat in flight. Frontier Airlines does not provide a car seat, and passengers have to get their own.
• Car seats must meet certain requirements and be approved by Frontier Airlines before they can be used on their flights. The car seat must have a FAA label indicating that it has been approved for use on aircraft and must comply with specific safety standards.
• Car seats without a label have to be checked in by the passengers.
• Car seats must be used in a forward-facing position, and they must be installed in the aircraft seat according to the manufacturer's instructions.
• Frontier does not provide car seats for passengers, so travelers must bring their own approved car seat for use on the flight.
• There may be restrictions on the use of car seats during takeoff, landing, or turbulence, so passengers should follow the instructions of the flight crew.
• Car seats cannot be placed in emergency exit rows, in the rows directly in front of or behind emergency exit rows, or in the very first row. You can place the car seats in window seats, so they are not a hindrance in the aisle to other passengers.
• You have to buy a seat for placing a car seat if you are traveling with two infants and you are the only adult as you can hold only one infant in your lap.
• According to Frontier booster seat policy, you can get a booster seat in the cabin with you, but it has to be stowed in the overhead bin for take-off and landing. However, it can be used during cruise.
• If you want to know, "How much does it cost to book a booster seat on frontier airlines" the cost to book a booster seat on Frontier depends on the baggage policy at Frontier airlines; you may get a booster seat for free in the aircraft depending on the number of bags and baggage allowance on your ticket.a