In general, when booking your flight to San Francisco, February is the cheapest month on average.
On average, from most locations, when planning your trip to San Francisco, try to book your flight in the region of 60 days in advance for the cheapest prices.
On average, the cheapest flights to San Francisco are found when departing on a Thursday. Try to avoid departing on a Sunday, as this is usually the most expensive day.
In general, when looking for the cheapest flight to San Francisco, our data indicates that afternoon flights are the most cost-effective. midday flights tend to be the most expensive.