Before the flight

Make sure to choose your seats as soon as you book your flight. Since restrooms are usually located at the back of the plane — and also near the front of the cabin, depending on the aircraft — you may want to choose seats near those areas so you won't have to go far if you and your child need the restroom or you need to change your baby's diaper. Additionally, children oftentimes enjoy looking out the window during a flight, so you may want to opt for a window seat so they can see other planes, a busy tarmac or clouds once you're up in the air.

Most airlines, including United, allow a child under the age of two to sit on a parent's lap. But if it fits within your budget, you could consider buying them their own seat and, depending on the child's age, bringing a government-approved child seat for them to use in the purchased seat. This allows you and your child to travel more safely and comfortably, and can help create a better sense of security for your child if they're used to the child seat you bring along.

Make sure to prepare your kids prior to the flight. Although airplanes can be exciting, they can also be scary for kids at first. Take time to explain what to expect during your journey, from the time they arrive at the airport until the plane lands at your destination. You can tell them about the kinds of people they will meet, such as gate agents, flight attendants and pilots, and the different events that occur, like boarding, the flight attendants' safety message and the sound of the aircraft engine during takeoff. This way they can enjoy identifying the people and events that make up their first flight.

At the airport

To avoid any unnecessary stress, print your boarding passes or download them to your mobile device before arriving at the airport. Also plan to check your baggage as soon as you get to the airport so you don't have to worry about carrying along extra gear.

You can check with the Transportation Security Administration (TSA) if you're unsure about what's allowed past security checkpoints, but baby formula, breast milk, food and medications aren't subject to the 3.4 ounce liquid restriction, so you're able to bring larger amounts of those items with you. Just make sure to let TSA officers know right away that you're carrying those items so you're not slowed down during the screening process.

After you've made it through security and are waiting at the gate, make sure your children have entertainment to keep them occupied while you wait. While most flights offer entertainment, there may be times when the inflight entertainment is not available, so bring toys, games, a tablet, coloring books or whatever it takes to keep them occupied and happy during a flight. If you're traveling with babies or toddlers, be sure to double check your diaper bag and make sure it has clothing, baby wipes, lotion, toys and extra bottles. Also, pack a favorite blanket and pillow for inflight naps.

You'll also want to carry various snacks, such as sandwiches, fruit, nuts, crackers or popcorn, and account for possible delays because food options may be limited. It's also a good idea to pack empty sippy cups or water bottles to fill up with inflight beverages.

On board the flight

When it's time to board your flight, you can take advantage of United's policy that allows families with children two and younger to pre-board. This will give you that much-needed time to stow your items and get you and your children in your seats so you're comfortable and ready for your flight.

By request, strollers can be checked at the gate at no additional cost. Before boarding starts, simply ask the gate agent to put a baggage tag on the stroller and you can leave it at the bottom of the jet bridge as you board the plane. When you get to your destination, your stroller will be waiting for you on the jet bridge after you exit the plane.

Once you're on board and settled, it helps to have a bottle on hand during takeoff and landing because it can help alleviate ear pressure for babies and toddlers. For older children, tell them what's about to happen and encourage them to look out the window to see what's going on before take-off. While in the air, create easy access to all the things you need to keep your children entertained and happy, and before you know it, you'll be on the ground again in no time. With just a little preparation, flying for the first time can be an exciting experience for both you and your child.