Knitting is not permitted on Australian flights, as knitting needles (and crochet hooks) are clearly Very Dangerously Sharp Things.
However, you can take pencils on board....
Varnish the tips with Estapol ... leave to dry for a few days.
Measure and mark their diameter. If you're not moving house and can find things, you can wrap elastic bands around the ends too!
Here they are in action, in flight. My pencil needles got through security without any comment, as did my ball of yummy Noro. When the opportunity presented itself, I took a deep breath, and asked the flight attendant if it was OK for me to knit with the pencils - she said I could, and commented that it was a great idea! So I happily knitted for about an hour (Taph's diagonal scarf pattern), and fitted 17 stitches on the pencils comfortably.
Close to the end of the flight, a different flight attendant (an older woman) walked past, and told me I wasn't allowed to knit on a flight, and gave the impression that I was somehow 'cheating' by using pencils. I said that I had asked, and had been given permission, but that I would put it away right away, which I did (I didn't want to cause a scene, or get a bad name for us knitters!). She was pretty disapproving of the whole thing.
So the moral is... if you're lucky, you can knit something narrow on 7mm pencil needles. It's really the luck of the draw with who you get as a flight attendant. But maybe if enough of us do this - making a point about how crazy it is that it's OK to DRAW with a pencil but not to KNIT with a pencil... maybe they'll change the policy? Or perhaps it's the yarn they object to? ;)