Flying With Children. Yes, You Can Do It!
In 10 Seconds
The flight is rarely the hard part. The airport is. Kids 12 and under get modified TSA screening and can keep their shoes on. Formula, breast milk, and juice are exempt from the liquids rule if you declare them. Strollers and car seats fly free on every major U.S. airline. And no federal law makes an airline seat you next to your own child, so your seat assignment is something you handle at booking, not at the gate with a four year old on your hip.
You’ll Learn
- What to lock down before you ever leave the house, including the seating problem nobody warns you about
- Exactly how TSA screens children and what you can carry that other travelers cannot
- How strollers, car seats, and all that gear actually move through the airport
- What to do at the gate, and why boarding first is not always the win people think it is
- What belongs in the one bag you keep on your body
The Part Nobody Tells You
Everybody prepares for the flight. They download the movies, they pack the snacks, they rehearse the speech about inside voices.
Then they get flattened by the airport.
The airport is where the meltdowns happen, because the airport is two hours of standing in lines with nothing to look at, no snacks that made it past security, and a stroller that has to be surrendered at the exact moment your toddler decides it is the only thing she has ever loved. The flight itself is usually fine. Somebody is strapped down, somebody is watching a screen, somebody falls asleep on your arm and you lose feeling in it for ninety minutes and you do not care.
So let’s fix the airport.
Before You Leave the House
Seats together are not automatic. Handle it at booking.
Here is the thing that surprises people every single year: there is no federal law requiring an airline to seat you next to your own child. The Department of Transportation proposed one back in 2024, it never got finalized, and as of 2026 it is still just a proposal. What exists instead is a DOT dashboard that tracks which airlines have voluntarily committed to seating a child 13 or under next to an accompanying adult at no extra cost. As of now that list includes Alaska, American, Frontier, JetBlue, and Hawaiian. Several of the biggest names in the sky are not on it.
And even the airlines that do commit attach conditions. Everybody has to be on one reservation. Adjacent seats have to still be available when you book. You have to pick seats for the whole party or skip seats for the whole party, and then leave them alone.
What that means in practice: book early, book everybody on one reservation, and select your seats at purchase. And think very hard before you buy Basic Economy for a family, because on most carriers that fare blocks advance seat selection entirely. You save forty dollars and hand a computer the job of deciding whether your six year old sits with you or with a stranger in 22C who did not sign up for this.
Kids do not need ID to fly domestically. Everybody needs a passport internationally.
TSA does not require photo identification for travelers under 18 on domestic flights. Your airline might ask for proof of age for a lap child, so tuck a copy of the birth certificate in your bag if your baby is anywhere near that second birthday.
International is a different animal. Every single traveler needs a valid passport, including a newborn who is eleven days old. There are no exceptions, no grace periods, and no talking your way through it at the counter.
Your lap child still needs a boarding pass.
Children under two can fly free on your lap on domestic flights, but “free” does not mean “invisible.” The infant has to be added to the reservation and issued a boarding pass. On international routes, that lap infant usually costs about ten percent of the adult fare plus taxes, so it is not free at all. And because of oxygen mask math, one adult can hold one infant. Two babies means two seats.
Jani’s Tip
If your child is turning two anywhere near your travel dates, check the return flight, not just the departure. That lap child seat is only valid while they are under two on the day they fly. I have watched a family get very quietly informed at the gate that the baby who flew down on a lap was going to require a purchased seat coming home. That is a bad morning and an expensive one.
Getting to the Airport
Take whatever cushion you normally build in and add thirty to forty five minutes.
Not because security is harder with kids. Because everything is. The parking shuttle takes longer to load. The check in counter takes longer because you have gear to tag. Somebody needs the bathroom the second you clear security, and somebody else needs it again at the gate, and the two events will not overlap. That is not pessimism, that is arithmetic.
If you are still figuring out your baseline, I walked through the whole backward math in How Early Should I Get To The Airport? Start there, then add the family buffer on top.
Checking In and Checking Gear
Good news, and it is genuinely good: on every major U.S. carrier, a stroller and a car seat check free when you are traveling with a child. That does not count against your bag allowance. A diaper bag generally does not count as a carry on either, though the airlines word it as one per child, so do not show up with four.
You have two choices for the big gear.
Check it at the counter if you will not need it inside the airport. It goes with the luggage, you walk through the terminal unencumbered, and you collect it at baggage claim. Cleaner, but you are carrying a child through the whole airport.
Gate check it if you want the stroller until the last possible second, which most parents with a walker or a toddler do. You roll right up to the jet bridge, fold it, tag it, leave it at the door. Most mainline flights hand it back to you on the jet bridge on arrival. Regional jets often send it to baggage claim instead, which is worth knowing before you land somewhere at eleven at night and stand at an empty jet bridge feeling betrayed.
Get your gate check tag at the gate counter when you arrive, not when boarding starts. It takes ninety seconds and it saves you from standing in a line holding a folded stroller and a child at the same time.
If you plan to use a car seat on the plane, it has to carry a label saying it is certified for use in motor vehicles and aircraft, and it needs to be roughly sixteen inches wide or narrower to fit. The seat goes in a window seat, never on the aisle, never in an exit row or the rows directly ahead of or behind one. The CARES harness is the lighter alternative, FAA certified for children roughly 22 to 44 pounds, and it weighs about a pound instead of twenty.
The Security Checkpoint
This is the part people dread, and it is honestly the friendliest part of the airport for families.
Children 12 and under get modified screening. They keep their shoes on, they keep light jackets and headwear on, and if they set off an alarm, officers will try to re screen them a couple of ways before anything else happens. Standard adult procedures start at 13.
Your child will not be separated from you. Not at any point. If an officer needs to do something with your child, you are right there for it.
Everybody comes out of the equipment. The stroller gets folded and X rayed. The car seat gets X rayed. Babies get carried through the metal detector in your arms, and a sling or carrier is usually fine, though it may earn you a little extra attention.
Formula, breast milk, and baby food skip the 3-1-1 rule. Reasonable quantities are allowed well over 3.4 ounces, and so are the ice packs and freezer packs keeping them cold, even when there is no milk in the cooler yet. Juice for a small child counts too. Here is the catch that costs families the most time: the exemption only works if you announce it at the start of screening and pull those items out yourself. Do not bury the bottles in the bottom of the diaper bag and hope. Say it out loud, hand them over, keep moving.
You also do not have to have your child with you to carry breast milk through a checkpoint. A parent traveling solo can bring it home.
PreCheck is a real family advantage. Kids 12 and under can walk into the PreCheck lane with an enrolled parent, no indicator needed on their boarding pass. Teenagers 13 to 17 can too, as long as they are on the same reservation and the indicator shows on their pass. One enrolled adult effectively pulls the whole family through the short line. The gap is that PreCheck does not apply to a gate pass, so if you are escorting an unaccompanied minor to the gate, you are going through standard screening.
Jani’s Tip
Feed the snacks before you get in the security line, not after. Solid food sails right through, but a full sippy cup of milk becomes a conversation, and a conversation at the front of a checkpoint line with forty people behind you feels roughly nine hours long. Empty the cups, hand over the bottles you actually need, and refill on the other side at a water fountain.
If somebody in your group has a medical condition, a disability, or a device that complicates screening, TSA Cares will arrange help ahead of time. That is a free service and almost nobody uses it.
At the Gate
Family preboarding still exists on most airlines, but not all, and the age cutoff varies. Some carriers board families with children under two. Some go up to six. Some quietly stopped doing it and just call it a courtesy now. Ask at the gate counter when you arrive rather than assuming.
And here is my slightly unpopular opinion: boarding first is not always the right call. Boarding first means your three year old gets an extra twenty five minutes strapped in a seat with the door open and nothing happening. If you have two adults, split it. One parent boards early with the gear and gets everything settled. The other stays in the terminal letting the kid run laps until final call, then walks on and sits down. You just cut twenty five minutes off the flight for the person least equipped to handle it.
If you are flying solo with a child, board early. You need the overhead space and the time.
Bathroom before boarding. Every time. Even if they say they do not need to. The airplane lavatory is the size of a phone booth and it will be occupied for the first forty minutes of the flight.
What Belongs in the Bag on Your Body
Not the bag in the overhead. The one under the seat that you can reach without asking anybody to move.
- A full change of clothes for the child, and a spare shirt for you. Anybody who has been vomited on at 30,000 feet understands the second item.
- Snacks that are solid, not liquid. More than you think. Then more than that.
- Something to suck, chew, or drink at takeoff and landing. A bottle, a pacifier, a lollipop, a straw cup. Ear pressure is the number one reason babies scream on descent, and swallowing fixes it.
- Wipes. For hands, faces, tray tables, and the mystery on the armrest.
- Kid sized headphones. Airline headphones do not fit small heads and the volume is not capped.
- A tiny surprise they have never seen before. Sticker book, dollar store toy, anything. Deploy at the first sign of trouble, not before.
- Any medication in the original labeled container, per the guidance in Traveling With Prescription Medications.
Download everything you plan to watch before you leave the house. Airport wifi is a rumor and inflight wifi is a gamble.
Quick Reference: Flying With Children
Situation What to Know Seats together No federal guarantee. Book early, one reservation, pick seats at purchase, avoid Basic Economy ID for kids Not required under 18 domestically. Passport required for everyone internationally, including infants Lap child Under 2 flies free domestically, still needs a boarding pass. Roughly 10 percent of fare plus taxes internationally. One per adult TSA screening Modified for 12 and under. Shoes and light jackets stay on. Never separated from you Formula and breast milk Exempt from the 3-1-1 rule in reasonable quantities. Declare at the start of screening and remove them yourself Ice packs Allowed, even with no milk in the cooler PreCheck Kids 12 and under join an enrolled adult free. Ages 13 to 17 need the indicator on their pass and the same reservation Stroller and car seat Check free on every major U.S. carrier. Gate check returns on the jet bridge on mainline flights, baggage claim on many regional jets Car seat on board Must be labeled certified for aircraft, window seat only, no exit rows Arrival time Your normal cushion plus 30 to 45 minutes
One Last Thing…
Traveling with children is not harder than traveling alone. It is just less forgiving. Everything you did not plan gets found out.
So plan the boring parts. Book the seats together at purchase instead of hoping. Declare the milk. Tag the stroller early. Feed everybody before the line, not after. Do those four things and the airport turns back into what it should be, which is the twenty minutes of waiting between your driveway and something your family will still be talking about in ten years.
And if the planning is the part that makes you want to lie down in a dark room, that is genuinely what I am here for. I book family trips for a living, which means I am the one checking seat maps, matching resorts to actual ages of actual children, and making sure the connection is not thirty five minutes in a terminal that requires a train. You get to be the parent who shows up excited instead of the parent who has been up since four researching baggage policies. When you are ready to go somewhere wonderful, come find me at Take Time To Travel.
After all…
One page at a time, we’re building a smarter way to travel.
XOXO, Jani ~ Personal Travel Advisor | Take Time To Travel, LLC
Updated August 2026
Airline family policies, fees, and TSA procedures change often and vary by carrier and airport. Always verify current rules with your airline and official government sources before you travel.
Related Traveler’s Handbook Articles
Airport Know-How
On the Plane
People Ask Me This Every Single Week
- How Early Should I Get To The Airport?
- Traveling With Prescription Medications
- Travel Electronics & Chargers Made Simple
Before You Go
- Packing Like a Pro: The Ultimate Packing Guide
- Passports Made Simple
- REAL ID Explained
- TSA PreCheck, Global Entry, CLEAR & Digital ID
Hotels & Resorts
Journeys With Jani: Traveler’s Handbook 
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