It’s generally more expensive to depart on a Sunday, if you have to leave on this day you can still search on Cheapflights to find great options that meet your needs.
The best pricing can be found in the month of October. Prices to San Francisco from Thunder Bay average C$ 610. You can even find prices in October for less than C$ 610, as users have found deals to San Francisco from as low as C$ 442. The month of August appears to be one of the more expensive times to travel to San Francisco from Thunder Bay. Flying in the targeted month can save you up to 105%.
When flying from Thunder Bay to San Francisco, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.