Hi Eli. Thank you for the review :)
May I ask you, is this type of stroller a cabin size stroller? Thank you
Heya, ACK,
I am sorry to say t isn't, you won't be able to take it on board as a piece of cabin luggage. It is too long and large for that. Normally, no double strollers actually can fit a carry-on size requirements.
However, you can take it with you as baby's luggage, which is usually free, and the process is usually so that you only give the stroller away when boarding, and you get it back when getting off the airplane.