Maxi-Cosi Romi: Light FAA Accepted Travel Convertible Reviewed
The Romi is FAA accepted, weighs 12 lbs, and good for infants and young toddlers, 18.5-inch seat width.
Flying with a car seat? Our Certified Child Passenger Safety Technicians are ready to help.
They'll walk you through every step — from choosing a seat that's safe for your child and convenient for your family, to getting it from the car, to the gate, and onboard the plane.
FAA Acceptance
Yes, FAA-accepted
Approved for use in motor vehicles and on aircraft.
yesWeight Range
5–50 lbs and 19–49 in
Rear-facing from birth; forward-facing after child reaches 30 lbs and minimum age requirements
yesSeat Weight
12 lbs
One of the lightest FAA accepted convertible car seats available
yesSeat Width
18.5 inches
Slim enough for most economy aircraft seats.
yesMaxi-Cosi Romi Specifications
The Maxi-Cosi Romi is an FAA accepted convertible car seat that weighs just 12 lbs and spans newborns through 50-lb toddlers. Typically outgrown around 2.5-3 years old out by torso height. At $150, it is one of the more affordable dedicated travel convertibles. The 18.5-inch seat width fits most economy aircraft seats with the armrest raised.
- The Romi is certified for use in motor vehicles and aircraft.
- The Romi weighs 12 lbs — among the lightest FAA accepted convertible car seats available for travel.
- The Romi is appropriate for children between 5-50 lbs and in the 19–49 inch height range.
- At 18.5 inches wide, the Romi comfortably fits most standard economy aircraft seats, especially with the armrest raised.
Maxi-Cosi Romi Specifications
Important — Car Seat Information
Child restraint information changes frequently. Airline policies, seat dimensions, and compatibility requirements are updated on an ongoing basis. For the most current and accurate information, please consult with one of our Certified Child Passenger Safety Technicians (CPSTs) inside the Velivolo app before you fly.
FAA Acceptance & Aircraft Certification
- Confidence:
- Verified (manual reproduction)
- Label location:
- Side of the seat shell, near the child's left shoulder area
- Regulatory:
- 14 CFR 121.311 / FAA AC 120-87C / FMVSS 213
- FMVSS 213:
- Yes
- FMVSS 213a:
- not published
Airworthiness note
The Romi is certified for use in motor vehicles and aircraft, meeting FMVSS 213 standards.
Aviation Fit & In-Flight Use
The Romi is certified for aircraft use across all major US carriers. At 18.5 inches wide and 12 lbs, it fits standard narrow-body economy seats and is light enough for easy terminal carry. Aircraft installation uses the lap-belt-only method — no base is used on the plane. The LATCH connectors double as a carry strap through the terminal. Gate-checking is an option for longer flights where cabin carry is impractical, though the low weight makes cabin use the preferred approach for most families. For wider seats, it will fit with the armrest raised.
The Romi is the best value FAA accepted convertible for flying families — at 12 lbs it is lighter and cheaper than any comparable seat in its class.
- Install Method
- Lap belt only — no base used on aircraft; standard FMVSS 213 certified
- Economy Fit
- Fits (armrests as noted)
- Gate-Check
- Cabin-carry preferred
- Recline-Friendly
- Yes
Velivolo Travel Score
18.5-inch width fits most economy seats; 12-lb carry weight makes cabin use feasible on all domestic routes.
At 12 lbs, the Romi is one of the lightest car seats to transport through the airport.
Practice at home and rideshare installation is a breeze due to it's simple installation.
Non-folding design, but 12-lb weight and 18.5-inch width make the Romi manageable .
Velivolo Score
At 18.5 inches wide and 12 lbs, the Romi is one of the most practical convertibles for cabin use.
Aircraft lap-belt-only install is straightforward.
FMVSS 213 certified with reinforced side-impact protection; clean recall history on the Romi model.
At $150 with a 5–50 lb range covering newborn through toddler, the Romi offers strong value-per-year.
Twelve pounds makes the Romi one of the most portable FAA Accepted convertible seats.
Pros & Cons
- Only 12 lbs — one of the lightest FAA accepted convertible car seats available for travel families.
- FAA accepted across the full 5–50 lb range, covering both rear-facing and forward-facing on aircraft.
- 18.5-inch seat width fits very comfortably in standard economy aircraft seats.
- PureCosi flame-retardant-free fabric is machine washable and dryer-safe — practical for travel use.
- At $150, the Romi is a more affordable FAA accepted convertible in the travel-seat category.
- FlexInsert newborn positioner included, allowing use from birth without purchasing a separate infant insert.
- More expensive than it's car seat cousin with the same shell, the Cosco Scenera Extend.
- Not as long-lasting as other convertible car seats on the market. Often outgrown before a child is ready to transition to a booster, so a second forward-facing seat would be needed.
- Typically outgrown around 2.5-3 years old.
Best For
Frequent-flying families with infants and toddlers
At 12 lbs with an integrated carry strap, the Romi is the easiest convertible to carry through an airport terminal. For families who prioritize more 'plush' this seat's fabric, harness pads and infant insert sets it apart from the more basic Cosco Scenera Extend.
Budget-conscious travel families
At $150, the Romi is an affordable FAA accepted convertible that covers newborns through 50-lb toddlers. Families who want a dedicated travel seat without spending $300–400 on a premium travel convertible will find strong value here.
Families using rideshares and rental cars
The Romi's fairly simple installation make it practical for families in unfamiliar rental vehicles and rideshares. The seat can be carried in a lightweight travel bag and installed in minutes without a vehicle-specific base.
Parents needing a dedicated grandparents' or secondary car seat
At $150 and only 12 lbs, the Romi makes an excellent dedicated second seat for grandparents' or caregivers' vehicles.
Key Features
12-Pound Travel-First Design
The Romi was designed specifically for travel families who need a full-range car seat they can actually carry. At 12 lbs, it is among the lightest FAA accepted convertible seats on the market. The seat covers children from 5 lbs rear-facing through 50 lbs forward-facing, meaning one seat handles the journey from newborn to preschool age.
FlexInsert Newborn Positioner
The Romi ships with a FlexInsert newborn positioner. Removing the adjustable head pillow for very young newborns can further improve fit for the smallest babies. Velivolo encourages parents to get a fit check by a CPST, especially for newborns.
PureCosi Flame-Retardant-Free Fabric
The Romi is upholstered in PureCosi fabric, which is made without added fire retardant treatmentsl. The fabric is machine washable and dryer-safe, making it practical for travel use where spills and messes are common. Flame-retardant-free fabric at this price point is uncommon and represents meaningful value for health-conscious families.
Reinforced Side Impact Protection
The Romi features reinforced Side Impact Protection built into the shell. The seat is based on the same structural platform as the Cosco Scenera Extend, which was designed to comply with the updated FMVSS 213 side-impact provisions. This construction provides energy-absorbing side protection for both rear-facing and forward-facing children, a safety feature that was previously absent on budget travel convertibles.
Real-World Scenarios
Domestic economy flight with 18-month-old at 22 lbs
The Romi is the ideal seat for this scenario. At 12 lbs the parent carries it through security on one shoulder. The 18.5-inch width fits the economy seat. Lap-belt-only install takes under two minutes. The child rests comfortably during the flight in their FAA accepted harness.
International long-haul economy flight, 11 hours
The Romi fits and installs on most widebody aircraft. On an 11-hour flight, families will want the child using the FAA accepted seat for takeoff, landing, and turbulence.
Rental car with 3-year-old at 34 lbs forward-facing
The Romi installs forward-facing with LATCH and top tether. Bring the user manual with you, and locate the rental car's top tether anchor before relying on the Romi forward-facing in rental vehicles.
How It Compares
Per Diono's published documentation, the Radian 3RXT is narrower at 17 inches versus the Romi at 18.5 inches, and extends to 65 lbs forward-facing versus the Romi's 50 lbs. The 3RXT also includes an anti-rebound bar and fold-flat design for travel. However, the 3RXT weighs approximately 26 lbs compared to the Romi at 12 lbs, and costs twice as much. Choose the Romi for lightweight budget travel; choose the 3RXT for maximum longevity and narrower three-across fit.
Read full reviewPer Diono's published documentation, the Radian 3QXT is the more affordable Diono travel convertible at 17 inches wide and approximately 20 lbs. It extends to 65 lbs forward-facing and includes the same fold-flat travel design. At $199–249 versus the Romi at $150, the price gap is smaller. The Romi wins on weight (12 vs 20 lbs) and price; the 3QXT wins on longevity and fold-flat portability.
Read full reviewPer WAYB's published documentation, the WAYB Pico is a FAA accepted 5-point harness seat covering 22–50 lbs in a foldable aluminum-frame design weighing approximately 8 lbs. The Romi covers 5–50 lbs including newborns, which the Pico cannot. The Romi at $150 costs less than half the Pico's price. The Pico wins on fold-flat compactness and lower weight; the Romi wins on newborn coverage, price, and LATCH vehicle install capability.
Read full reviewPer Graco's published documentation, the Extend2Fit extends rear-facing to 50 lbs with an adjustable foot extension panel, and carries forward to 65 lbs. At a comparable price to the Romi, the Extend2Fit offers longer rear-facing capacity. However, the Extend2Fit weighs approximately 27 lbs versus the Romi's 12 lbs, and is not optimized for travel portability. Choose the Extend2Fit for maximum rear-facing extension in a primary household vehicle; choose the Romi for a dedicated lightweight travel seat.
Read full reviewAirport & Travel Tips
Store the Top Tether Anchor in the Airport
Store the top tether strap to the seat shell when leaving the car, you won't use it for the aircraft installation. At 12 lbs it is light enough to carry through the terminal, security line, and jet bridge without straining yourself.
Book a Window Seat for the Child
Car seats should be installed in window seats. Book the window seat for the child when purchasing tickets. This ensures the seat can be installed without blocking aisle access.
Install Rear-Facing for Flights
Convertible car seats may be installed rear-facing or forward-facing on aircraft depending on the child's weight and age. For children who don't meet the minimum requirements to forward-face, the Romi must be installed rear-facing on aircraft.
Frequently Asked Questions
Is the Maxi-Cosi Romi FAA approved for aircraft?
Yes, the Romi is certified for use in motor vehicles and aircraft. The seat is installed on aircraft using the aircraft lap belt. Flight attendants may ask to see the FAA label before permitting cabin use; the certification sticker is located on the side of the shell. The Romi is approved for both rear-facing and forward-facing use on aircraft and must be installed per the manufacturer guidelines.
How do I install the Maxi-Cosi Romi on an airplane?
The Romi installs on an aircraft seat using the aircraft lap belt. The installation is identical to it's car seat cousin, the Cosco Scenera Extend. Place the seat in the aircraft seat with the child-facing direction matching your child's age and weight requirements. Route the aircraft lap belt through the designated belt path marked on the seat. Buckle the aircraft lap belt and tighten by pulling the extra webbing— it should not move more than one inch side to side or front to back. Always book the window seat on commercial flights. A rear-facing installation example is available at the video linked in this review *note the video demonstrates the Cosco Scenera Extend which has the same installation.
What are the weight and height limits for the Maxi-Cosi Romi?
The Romi supports rear-facing use from 5 lbs up to 40 lbs, and forward-facing use from 30 lbs up to 50 lbs, across a height range of 19 to 49 inches. The smaller, compact shell leaves children outgrowing this seat typically by torso height before they reach the maximum weight limits. Children may outgrow the seat around their second or third birthday, depending on their individual growth trajectory. Parents of larger children should track both weight and height against the published limits and plan a transition to a longer-range seat before either limit is reached.
How heavy is the Maxi-Cosi Romi and can I carry it through the airport?
The Romi weighs 12 lbs, making it one of the lightest FAA accepted convertible car seats available. At 12 lbs it can be carried on one shoulder through the terminal, security line, and jet bridge without significant strain. For reference, most premium convertibles weigh 20–26 lbs, making the Romi meaningfully lighter for airport transit. You may consider transporting the Romi through the airport by connecting it to your rolling carry-on or stroller with luggage straps. You may also purchase a backpack type or roller-style car seat bag. This car seat is fairly light so a car seat dolly wouldn't be necessary compared to a heavier seat like the Nuna Rava or Graco Contender Slim.
Does the Maxi-Cosi Romi fit in economy airplane seats?
The Romi measures 18.5 inches wide. Standard narrow-body economy seats on US domestic aircraft range from 17 to 18.5 inches wide depending on the aircraft and carrier. On most domestic flights, the Romi fits with the armrest in the raised position. The Romi fits successfully on Delta, United, American, and most Southwest 737 aircraft, though Southwest's 17.5-inch economy seat width may require slight armrest adjustment. Plan to book the window seat, as this is the preferred location for child restraint systems.
Can the Maxi-Cosi Romi be used rear-facing from birth?
The Romi is rated for rear-facing use beginning at 5 lbs, which covers most full-term newborns from birth. The included FlexInsert newborn positioner provides additional head and body support for smaller infants. It's advisable to remove the adjustable head pillow for very young newborns to reduce the risk of chin-to-chest positioning. Parents should verify that the recline is correct and the harness slots are at or below the shoulder level for proper rear-facing harness fit. The seat should remain rear-facing until the child reaches the maximum rear-facing weight limit of 40 lbs or the maximum height limit, whichever comes first.
What is the LATCH weight limit for the Maxi-Cosi Romi?
The Romi features hook LATCH connectors that can be used throughout most of the seat's weight range. Because of the low seat weight, LATCH installation is practical for longer than with heavier convertibles. Always verify the specific LATCH limit in your vehicle's owner manual.
How does the Maxi-Cosi Romi compare to the Cosco Scenera Extend?
The Maxi-Cosi Romi is based on the same structural shell as the Cosco Scenera Extend. The key differences are the soft goods and included accessories: the Romi uses Maxi-Cosi's PureCosi flame-retardant-free fabric and includes harness pads, a head pad, and a FlexInsert newborn positioner. The Scenera Extend uses standard fabric without the PureCosi treatment. Both seats meet the same FMVSS 213 standards including updated side-impact requirements. The Romi typically retails for $150 versus the Scenera Extend at approximately $70–80. Families who prioritize flame-retardant-free materials and the included accessories should choose the Romi; budget-only buyers may prefer the Scenera Extend.
Sources
- 1Maxi-Cosi Romi Product Page (2026) — Specifications, FAA certification, weight limits, carry strap features. Source
- 2FAA Advisory Circular AC 120-87C (2019) — FAA guidance on child restraint systems in aircraft, CRS categories. Source
- 3NHTSA Child Safety Seats Recall Search (2026) — Recall history verification for Maxi-Cosi Romi — clean record confirmed. Source
- 4Amazon — Maxi-Cosi Romi B0DC1LPQVP Listing (2026) — Retail specifications, weight limits, FlexInsert confirmation, price. Source
- 5Maxi-Cosi Car Seat Expiration Policy (2026) — Expiration date guidance and how to locate manufacture date on Maxi-Cosi seats. Source
Last updated: 2026-05-15
Velivolo Editorial Team
Family Travel Experts
Our editorial team combines certified child passenger safety technicians, frequent-flying parents, and automotive safety researchers to deliver independent, data-driven car seat reviews for traveling families.
Related Travel Car Seats
.webp&w=3840&q=75&dpl=dpl_45uUh9G5C7kJ77y59qU1D6TW4Ksi)
Legal Disclaimer
The car seat information provided on this page is intended for general informational purposes only and is subject to change without notice. Velivolo makes no representations or warranties, express or implied, regarding the accuracy, completeness, or timeliness of any car seat data, airline compatibility information, or related recommendations displayed on this platform.
Velivolo is not liable for any damages, injury, loss, or harm arising from reliance on incorrect, outdated, or incomplete car seat information or recommendations. Parents and caregivers are solely responsible for verifying all child restraint information with the relevant airline, the car seat manufacturer, and a Certified Child Passenger Safety Technician (CPST) before travel.
Affiliate Disclosure: Some product links on this page may be affiliate links. Velivolo may receive a commission if you make a purchase through one of these links, at no additional cost to you. This does not influence our content, recommendations, or editorial decisions.
Use of this information does not constitute professional child passenger safety advice. For personalized guidance, consult a Certified Child Passenger Safety Technician (CPST) through the Velivolo app.
Ready for the Lightest FAA Accepted Travel Convertible at $150?
Velivolo helps families find the right car seat for every flight, rental car, and rideshare — so you can travel confidently knowing your child is in a verified FAA accepted seat from takeoff to destination.