Flying United Airlines with Kids: Bassinets, Family Boarding & Car Seat Rules

Per United Airlines' published policy, infants under 24 months at time of travel may fly as lap infants without a base fare on US domestic routes — the ticket shows as USD 0.00 with no additional taxes. On international routes, the published fee is 10% of the adult base fare plus applicable government taxes and fees. For example, a USD 1,000 adult base fare would result in a lap-infant fare of USD 100 plus taxes. The key eligibility requirement is that the infant must be under 24 months on every segment of the trip — if a child turns 2 mid-trip, the remaining legs require a purchased seat at the full adult fare. Always verify the current fee structure at united.com before booking.

Per United Airlines' published policy, infants under 24 months are not required to have their own seat — they may travel as lap infants held by a parent or guardian age 18 or older. However, the FAA strongly recommends that every child under 2 travel secured in an FAA-approved child restraint system (CRS) in their own purchased seat, as lap-held infants are at significantly greater risk of injury during turbulence or emergency stops. Per United Airlines' published policy, if you purchase a seat for your infant, the airline charges the full adult fare at the applicable fare class — there is no infant seat discount. The car seat must display the FAA-approved sticker to be used in-cabin. Gate-checking the car seat is free if you opt for the lap-infant ticket. Always confirm the seat width matches your car seat's base dimensions before boarding.

Per United Airlines' published policy, bassinets are available on the 757-200/-300, 767-300ER/400, 777-200/300ER, and 787-8/9/10 international fleet and can be pre-reserved by calling United Reservations before departure. The Polaris business-class fixed bassinet accommodates infants up to 11.3 kg / 25 lb, while the Economy wall-mount bassinet accepts infants up to 15.8 kg / 35 lb — the highest weight cap in the global airline industry, exceeding Singapore Airlines (14 kg), Emirates (11 kg), and Lufthansa. Each cabin has one to four bassinet positions. Families who reserve a bulkhead seat for the accompanying parent typically receive complimentary access to the adjacent seat for one companion as well. Availability is limited and fills quickly on popular transatlantic and transpacific routes — call as early as possible after booking.

Per United Airlines' published policy, children 2 and older who have purchased a seat receive the full adult baggage allowance for their fare class — the same number of free carry-ons and checked bags as an adult on the same ticket. Lap infants (under 2, no seat purchased) do not receive an independent baggage allowance on domestic routes but may bring a free diaper bag that does not count against the parent's allowance. On international routes, per United Airlines' published policy, lap infants receive one free checked bag up to 10 kg / 22 lbs in addition to the free stroller and car seat check. Basic Economy domestic fares restrict carry-on bags for all passengers including children — verify fare-class rules before booking. Always check the most current United baggage fee schedule at united.com, as fees may vary by route and booking date.

Per United Airlines' published policy, unaccompanied minor (UM) service is mandatory for children ages 5 through 14 traveling without an adult age 18 or older on the same itinerary. The fee is USD 150 each way per child — the same rate as American Airlines and Delta, and three times the USD 50 fee charged by Alaska Airlines. Children ages 5–7 are restricted to non-stop flights only; ages 8–14 may connect at United-operated airports on United-operated metal only — no interline or codeshare-partner connections. Children 15 and older may travel as adults. Booking must be completed by phone through United Reservations; online enrollment is not available. Both the drop-off adult and the authorized pick-up adult must present valid government-issued photo ID. Arrive at least 90 minutes before departure to complete UM documentation at the United ticket counter. Always verify the current UM policy at united.com before booking.

Per United Airlines' published policy, the Economy wall-mount bassinet on United's international wide-body fleet accepts infants up to 15.8 kg / 35 lb — the highest bassinet weight cap in the global airline industry as of 2026. This compares favorably to the benchmarks: per Singapore Airlines' published policy, Singapore's bassinet cap is 14 kg / 30.8 lb; per Emirates' published policy, Emirates' cap is 11 kg / 24.2 lb. The Polaris business-class fixed bassinet on United's fleet carries a lower cap of 11.3 kg / 25 lb. The bassinet is available on the 757-200/-300, 767-300ER/400, 777-200/300ER, and 787-8/9/10 aircraft and is positioned at the bulkhead row. Parents of infants who exceed the weight caps of competing carriers — but still fall under 15.8 kg — may find United's Economy cabin uniquely accommodating for bassinet travel on long-haul routes. Always pre-reserve by phone as soon as possible after booking.

Per the US Department of Transportation's Family Seating Dashboard (April 2024), United Airlines has committed to fee-free adjacent seating for children age 14 and under when traveling on fee-eligible fares. This means United's booking system is required to seat a child next to an accompanying adult without charging an additional seat-selection fee on applicable fares. This places United on the ✅ committed-carrier list alongside American Airlines and Alaska Airlines. Per the same DOT dashboard, Delta Air Lines has not made this commitment, meaning Delta families may incur seat-selection fees to guarantee adjacency on certain fares. Note that Basic Economy fares with structural seating restrictions may be exempt from this commitment — verify the specific fare rules at the time of booking and always confirm adjacency before the flight departs. More details are available directly from the US DOT.

Per United Airlines' published policy, adding a lap infant online via 'My Trips' on united.com or the United mobile app is supported for most US domestic bookings. After completing your adult booking, navigate to 'My Trips,' select the itinerary, and use the 'Add Lap Infant' option. You will be asked to enter the infant's full legal name and date of birth, which must match the birth certificate. International itineraries and any booking where the operating carrier is a codeshare partner require a phone call to United Reservations — the online tool does not support these booking types. Parents booking complex international itineraries involving multiple carriers should call as early as possible, as agent wait times can be longer during peak travel periods. Always verify the infant is correctly listed on the updated booking confirmation before the travel date.

Per United Airlines' published policy, strollers are accepted for free gate check or counter check on all United flights. The gate-check weight limit is 20 lbs / 9 kg — strollers under this limit can be wheeled to the jet bridge and handed to the gate agent just before boarding. Heavier jogging strollers, double strollers, or strollers over 20 lbs must be checked at the ticket counter. On mainline United flights (777, 787, 737 MAX 9), strollers are returned at the jet bridge upon arrival — a convenient experience for families. On United Express regional jet flights operated by SkyWest, Republic, and CommutAir (CRJ-200, E145, E175), strollers are typically returned at the baggage carousel, not the jet bridge. Parents on connecting itineraries that include a regional-jet segment should plan for the carousel retrieval when choosing a stroller for travel.

Per United Airlines' published policy, family boarding is available for passengers traveling with children under 2 years old, or who are carrying strollers or car seats to the gate. United designates this as Group 1.5 — it occurs after Premier 1K and Global Services elite members have boarded, but before all standard Groups 2 through 5. This is meaningfully earlier in the boarding sequence than American Airlines' family boarding in Group 4. No additional fee applies for family boarding, and no special registration is required — the gate agent will announce the Group 1.5 family boarding call. Boarding early gives families with young children extra time to install car seats, stow carry-on bags in overhead bins, and get young children settled before the general boarding rush. Always listen for the gate announcement to avoid missing the dedicated family call.

Per United Airlines' published policy, there is no standard child fare discount for passengers 2 years of age and older. Every child 2+ pays the full adult base fare at the applicable fare class — Economy, Economy Plus, or Polaris — on all domestic and international routes. This is consistent with the practice of all five US-legacy carriers: Delta, American, United, Alaska, and Hawaiian all publish adult-equivalent fares for children 2 and older. By contrast, per Lufthansa's published policy, Lufthansa offers a percentage discount on certain international fares for children under 12, and per All Nippon Airways' published policy, ANA offers child discounts on domestic Japanese routes. US families should plan family budgets for United travel with the expectation that every seat-occupying child carries the same fare as the adults in the booking.

Per United Airlines' published policy, infants traveling as lap infants must be able to demonstrate their age at check-in if requested. Acceptable documents include a birth certificate (original or certified copy), a passport, or a government-issued photo ID that clearly shows the infant's date of birth. For international travel, a passport is required for the infant in virtually all cases — a birth certificate is generally not accepted at international border control. Immunization records showing date of birth may be accepted at the gate as an additional verification document. Parents should ensure the name on all documents matches the name entered into the booking exactly, as mismatches can cause delays at the airport. For infants under 7 days old, travel is not permitted per United Airlines' published policy. Always verify the specific document requirements for your destination country at united.com or through United Reservations before departure.