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UPPAbaby Alta

The UPPAbaby Alta has a booster weight limit of 100 lb.

DiscontinuedNo longer made or sold new. Specs are kept for comparing generations. Replaced by UPPAbaby Alta V2.

  • 100 lbBooster to

All booster seats

Alta: key facts

  • The UPPAbaby Alta works as a booster from 40 to 100 lb and 38 to 57 in tall, per UPPAbaby.
  • Outgrown by height: "IMPORTANT: The child’s ears MUST be below the top of the booster headrest."
  • It installs with vehicle lap-shoulder belt or rigid lower anchor connectors + vehicle lap-shoulder belt.
  • UPPAbaby says it isn't certified for aircraft.

From UPPAbaby's manual and published specs. Always follow the limits on your seat's labels.

How the Alta stacks up

Against the 66 booster seats we track. The shaded band is where the middle half of them fall; the dot is this one.

Booster weight limit100 lb44th highest booster limit of 65

Within the typical range for booster seats (100 lb to 120 lb).

This one
100 lbmiddle 110 lb120 lb

Alta: generations

From each maker's published specs.

Flying with the Alta

UPPAbaby's label: “NEVER use this Child Restraint on an aircraft. This restraint is NOT certified for use in aircraft, because aircraft do not have shoulder belts.” American lists “Booster seats with no approval label or shoulder harness” under seats and devices not approved for use on board (source).

What airlines say about car seats:

  • American: “Each ticketed customer is allowed 1 stroller and 1 car seat to be checked free of charge” “If an unoccupied, adjoining seat is not available, the gate agent will check the safety seat to your final destination.” Source
  • Alaska: “We will transport your child's car seat and stroller free of charge as checked baggage.” Source
  • JetBlue: “Checking a child safety seat will not count towards your checked baggage allowance and there is no fee assessed” Source
  • Spirit: “One (1) car seat will be accepted per child as checked baggage at no charge.” Source
  • Frontier: “strollers and car seats can be checked for free.” Source
  • Allegiant: “There is no charge for checking or gate checking one car seat per fare-paying passenger.” Source
  • Breeze: “Child seats may be carried on board the aircraft if a seat has been purchased for the Infant or Child” Source

Quoted from each airline's page as of 2026-11-02.

Where to buy the Alta

Prices and availability change. We may earn a commission from some links.

good to know
  • Discontinued. You may still find it used or on clearance.
  • Check for recalls: Search the agency's recall list with the model number and date code from the label: NHTSA recall search.
  • Car seat use and installation: see NHTSA's car seat page, which also lists free car seat inspection by certified technicians. Check the label and the maker's instructions, and ask your pediatrician about your child.

Full specs

UPPAbaby Alta
TypeBooster
Booster weight40–100 lb
Booster height38–57 in
Head ruleIMPORTANT: The child’s ears MUST be below the top of the booster headrest.
Installationvehicle lap-shoulder belt, rigid lower anchor connectors + vehicle lap-shoulder belt
Load legNo
Anti-rebound barNo
RotatesNo
Aircraft labelNot certified for aircraft

Compare the Alta with

How each closest rival differs from the Alta, from the makers' specs.

Ask the meadow

Alta: questions answered

From UPPAbaby's published specs and retailer listings, last checked 2026-11-06.

Can you bring the UPPAbaby Alta on a plane?

UPPAbaby doesn't list it as certified for aircraft, so it can be checked as luggage but not used in the plane seat. See seats approved for planes.

Is it OK to buy a used Alta?

NHTSA publishes guidance on used car seats on its car seat page. Check the label and the maker's instructions, and ask your pediatrician about your child.

Still wondering? Write to us at hello@cribpicks.com and we'll look it up.

More booster seats

Where these specs come from

Last checked 2026-11-06. Spot something wrong? Tell us. Read our editorial and safety policy and corrections.