For Economy Class flights, the cheapest month to fly this route is November. The most expensive months are July and June.
The most United Airlines flights from YTO to SFO are scheduled on a Saturday (7 on average). You will have fewer United Airlines flight options on Tuesday, which is when the least amount of flights are scheduled (4 on average).
In terms of precipitation, rainfall in San Francisco ranges from 0.0 - 112.0 mm per month. January is typically the wettest month, when rainfall can reach 112.0 mm. July is typically the driest time to visit San Francisco when rainfall is around 0.0 mm.
If weather is an important factor for your trip to San Francisco, use this chart to help with planning. For those seeking warmer temperatures, September is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 11.0 C).
The best time to book a flight to San Francisco with United Airlines is 72 days before departure. On average, fares are higher if you book 2 days before departure.
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