Is this seat airline approved?

Hi Janine

Yes it is airline approved , how ever you must contact the air line you are flying with.

please see page 35 on the Instructions please see the link below 

https://www.babyonthemove.co.nz/car-seat/shop-by-weight/0-18kg/safety-1st-guide-65-convertible-car-seat?search=guild%2065

Hope this helps