Replying to cheap flights!

HELP!

ok i'm trying to find a super cheap flight to Reno from Toronto for early december (probably like dec 4 because flights are cheaper on a wednesday then say a friday) - what's the best place to look? the best price i've found is 411.89 USD...if anyone wants to help me i'd appreciate it SO MUCH. either give me good websites...or search for me.... :)!!!!
merci beaucoup
A man searching
for lost Paradise
Can seem a fool
to those who never
sought the other world - Jim Morrison