No. The ONIX pram cannot be taken on board as carry-on luggage. However, it can be checked in as part of your under-carriage luggage.
You can see the ONIX’s full specifications including its folded dimensions here.
If you are looking for a pram to take travelling (locally or abroad) we recommend our SKIP² Stroller, which can be taken on board* as carry-on. Our AERON Pram is also an excellent option for travelling with its compact and lightweight design that has all the features of a larger pram in a smaller size (including reversible seat, large basket and extra-large canopy). The AERON Pram still needs to be checked in.
*Always check with your carrier before travel.