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Evenflo Symphony All-in-One

The Evenflo Symphony All-in-One rear-faces up to 40 lb and forward-faces up to 65 lb.

Previous generationA newer version is out. Some stores still sell this one new.

  • 40 lbRear-facing to
  • 65 lbHarness to
  • 110 lbBooster to

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Symphony All-in-One: key facts

  • The Evenflo Symphony All-in-One rear-faces from 5 to 40 lb and 19 to 40 in tall; forward-faces with a harness from 22 to 65 lb and 28 to 50 in tall; works as a booster from 40 to 110 lb and 44 to 57 in tall, per Evenflo.
  • Outgrown by height: "Rear-facing: top of child's head is at least 2.5 cm (1 in.) below the top of the child restraint headrest."
  • It installs with seat belt rear-facing, LATCH (SureLatch) rear-facing, seat belt forward-facing + tether, LATCH (SureLatch) forward-facing + tether or booster: vehicle lap-shoulder belt.
  • Evenflo lists it as certified for aircraft ("Harness mode: certified for use in motor vehicles ... and in aircraft. In booster mode, this restraint is NOT certified for aircraft use. A belt-positioning booster requires the use of a lap/shoulder belt system, which is not available in aircraft.").

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

How the Symphony All-in-One stacks up

Against the 57 all-in-one car seats we track. The shaded band is where the middle half of them fall; the dot is this one.

Rear-facing limit40 lb11th highest rear-facing limit of 57

The same as most all-in-one car seats (40 lb).

This one
40 lbmiddle 40 lb50 lb

What sets the Symphony All-in-One apart

Measured against the 57 all-in-one car seats we compare, from each maker's published specs.

Next to its closest matches

  • Cybex Callisto T 360Next to it, the Symphony All-in-One is 10 lb lower rear-facing limit; no anti-rebound bar (the Callisto T 360 has it); no rotates (the Callisto T 360 has it).

Flying with the Symphony All-in-One

Evenflo's label: “Harness mode: certified for use in motor vehicles ... and in aircraft. In booster mode, this restraint is NOT certified for aircraft use. A belt-positioning booster requires the use of a lap/shoulder belt system, which is not available in aircraft.”

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 Symphony All-in-One

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

good to know
  • Previous generation, still sold by some retailers. Check whether a newer version replaced it.
  • 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

Evenflo Symphony All-in-One
TypeAll-in-one
Rear-facing weight5–40 lb
Rear-facing height19–40 in
Forward-facing weight22–65 lb
Forward-facing height28–50 in
Booster weight40–110 lb
Booster height44–57 in
Head ruleRear-facing: top of child's head is at least 2.5 cm (1 in.) below the top of the child restraint headrest.
Installationseat belt rear-facing, LATCH (SureLatch) rear-facing, seat belt forward-facing + tether, LATCH (SureLatch) forward-facing + tether, booster: vehicle lap-shoulder belt
Load legNo
Anti-rebound barNo
RotatesNo
Recline positions3
Aircraft labelCertified for aircraft, per the maker

Compare the Symphony All-in-One with

How each closest rival differs from the Symphony All-in-One, from the makers' specs.

Ask the meadow

Symphony All-in-One: questions answered

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

Does the Evenflo Symphony All-in-One rear-face longer than other all-in-one seats?

15 of the 70 all-in-one seats we track rear-face to a higher weight than its 40 lb. The highest is the Britax One4Life ClickTight All-in-One at 50 lb. NHTSA: stay rear-facing "until he or she reaches the top height or weight limit allowed by your car seat's manufacturer." (NHTSA)

Can you bring the Evenflo Symphony All-in-One on a plane?

Yes, Evenflo lists it as certified for aircraft; look for the red-lettered label that says so. The FAA asks that a car seat go in a window seat so it doesn't block the aisle, and the crew will look for that label.

Is it OK to buy a used Symphony All-in-One?

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 all-in-one car seats

Where these specs come from

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