I don't think is any law the prohibits taking any amount of cash on an airplane, though it'd be a good idea not to take alot for the usual reasons, theft, getting mugged, losing your luggage.
There is an 'anti money laundering' rule where you must declare if you are carrying more than C$10,000 into the country.Many countries have similar rules.
seeing as my monthly income is 15000, i carry around about 1000 you never know what your gonna wanna buy Unedeadknight: take at least half of that just in case some one mugs you or jumps you. it's...