Question : Have you considered flying out of an airport besides Toronto City Centre Airport (YTZ)?
Answer : Departing from Toronto City Centre Airport is not the only way to get to San Francisco International Airport. Try searching for flights from Pearson International Airport (YYZ) as well. Over the next two months, flights from YYZ to SFO are being booked 26% cheaper than flights from YTZ to SFO. Being only 11 miles away, it's easily accessible for most.