Cheap flights from St. Augustine to San Francisco (UST - SFO)
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Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Best time to book a flight from St. Augustine to San Francisco
Have a flexible travel schedule? Discover the best time to fly to San Francisco from St. Augustine with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from St. Augustine to San Francisco
What is the cheapest month to book a flight from St. Augustine to San Francisco?
Currently, January is the cheapest month in which you can book a flight from St. Augustine to San Francisco (average of $276). Flying from St. Augustine to San Francisco in June is currently the most expensive (average of $360). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from UST to SFO?
Find hourly flight availability from St. Augustine to San Francisco. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.
One of the essential ways to save on airfare from St. Augustine to San Francisco is to remain as flexible as possible. Flights that are in the evening tend to be the most expensive. A flight at noon could potentially save you up to 52% on airfare.
What is the cheapest day to fly from St. Augustine to San Francisco?
Use this chart to determine the cheapest time to fly round-trip from St. Augustine to San Francisco. Price data was last updated on March 30, 2025.
Travelers seeking maximum savings on their St. Augustine to San Francisco flight should consider departing on Thursday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.