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Peg Perego Viaggio Flex 120

The Peg Perego Viaggio Flex 120 is 17.3 in wide, weighs 14 lb, and has a booster weight limit of 120 lb, per Peg Perego. A high-back booster that folds flat for travel, with rigid LATCH and a long 12-year life.

  • $299.99List price
  • 120 lbBooster to
  • 14 lbSeat weight
  • 17.25 inWidth
See it on Peg Perego's site

When does it expire?

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Viaggio Flex 120: key facts

  • The Peg Perego Viaggio Flex 120 works as a booster from 40 to 120 lb and 39 to 63 in tall, per Peg Perego.
  • It installs with Rigid LATCH (optional) or seat belt.
  • Peg Perego says it expires 12 years after the date of manufacture.
  • Peg Perego says it isn't certified for aircraft.
  • It's 17.3 in wide at the widest point and weighs 14 lb.

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

How the Viaggio Flex 120 stacks up

Against the 65 booster seats we track. The shaded band is where the middle half of them fall; the dot is this one.

Booster weight limit120 lbHighest booster limit of 64 booster seats

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

This one
100 lbmiddle 110 lb120 lb
Expiration12 years

Above the typical range for booster seats (8 years to 10 years).

This one
6 yearsmiddle 10 years12 years
Width17.3 in16th narrowest of 31

Within the typical range for booster seats (17 in to 18.6 in).

This one
10.2 inmiddle 17.3 in23.2 in
Weight14 lb33rd lightest of 42

Above the typical range for booster seats (6 lb to 13.2 lb).

This one
1.8 lbmiddle 9.8 lb20.9 lb
Price$299.9950th lowest price of 53

Above the typical range for booster seats ($55.99 to $159.99).

This one
$19.98middle $79.99$399.99

What sets the Viaggio Flex 120 apart

Measured against the 65 booster seats we compare, from each maker's published specs.

  • Width: 17.3 inin the middle half of the 31 booster seats that publish it (17 in to 18.6 in)
  • Weight: 14 lbabove the middle half of the 42 booster seats that publish it (6 lb to 13.2 lb)

Next to its closest matches

  • Nuna AACENext to it, the Viaggio Flex 120 is 2 years longer before it expires; 5.3 in narrower; 1.6 lb lighter.
  • Cybex Solution G2Next to it, the Viaggio Flex 120 is 5.9 in narrower; 1.2 lb heavier.
  • Diono Monterey 5iST FixSafeNext to it, the Viaggio Flex 120 is 4 years longer before it expires; 0.3 in wider; 4.7 lb lighter.

Flying with the Viaggio Flex 120

Peg Perego's label: “This booster seat is not certified for aircraft use because aircraft seats 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.

Listed features

  • Folds flat
  • Rigid LATCH optional but recommended
  • Long 12-year life
  • Adjustable headrest, backrest height and width

Worth checking

  • List price $299.99
  • Listed as currently unavailable on Peg Perego's page

Where to buy the Viaggio Flex 120

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

good to know
  • 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

Peg Perego Viaggio Flex 120
TypeBooster
List price$299.99
Booster weight40–120 lb
Booster height39–63 in
Seat weight14 lb
Width17.25 in
InstallationRigid LATCH (optional), seat belt
Load legNo
Anti-rebound barNo
RotatesNo
Aircraft labelNot certified for aircraft
Expires after12 years

Compare the Viaggio Flex 120 with

How each closest rival differs from the Viaggio Flex 120, from the makers' specs.

Ask the meadow

Viaggio Flex 120: questions answered

From Peg Perego's published specs, last checked 2026-11-06.

Will the Peg Perego Viaggio Flex 120 fit three across or in a small car?

It's narrower than 53% of the boosters we track, at 17.3 in. The narrowest is the Mifold Comfort Grab-and-Go Booster at 10.2 in. Fit depends on your vehicle; check each seat's manual and your vehicle manual. 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.

Can you bring the Peg Perego Viaggio Flex 120 on a plane?

Peg Perego 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.

Viaggio Flex 120 or AACE: what's different?

By the makers' specs, the AACE has no added flame retardants (maker's claim); the Viaggio Flex 120 lists for $0.01 less. See every spec side by side.

Is it OK to buy a used Viaggio Flex 120?

NHTSA publishes guidance on used car seats on its car seat page. Peg Perego lists a lifespan of 12 years from manufacture for this model. 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.

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Where these specs come from

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