car seat airplane check

Car Seats on Airplanes?
I have a 18 month old and need to go on a trip soon, do you take the car seat along with you on the airplane or check it with the luggage?
Also does anyone have a suggestion for a small cheap car seat for this trip? The one we have for our car is huge and a hassle to move.
Thanks.
Haven’t bought the tickets yet ; )
Just looking for other mum’s experiences.
Thank you for your experiences, ladies ; )
Most airlines require a purchased seat for children 2 and over.
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An earthquake has rocked buildings and sent people fleeing into the streets in an area ranging across a large swath of Central Canada and the U.S.











