Cheap flights from San Diego to St. Augustine (SAN - UST)
Find cheap flights from San Diego to St. Augustine with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Find flight deals from San Diego to St. Augustine
Discover tips and strategies to find the most affordable flight options for your journey from San Diego (SAN) to St. Augustine (UST). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 12, 2025.
Most accurate provider | eDreams 3 stars |
|---|---|
Most trusted provider | eDreams 3 stars |
Compare providers for flights from San Diego to St. Augustine
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from San Diego to St. Augustine in December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on San Diego-St. Augustine flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on San Diego-St. Augustine flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from San Diego-St. Augustine flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on San Diego-St. Augustine flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for San Diego-St. Augustine flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from San Diego to St. Augustine
Have a flexible travel schedule? Discover the best time to fly to St. Augustine from San Diego with our price prediction graph.
Cheapflights Insights
Everything you need to know about your flight from San Diego to St. Augustine
What is the cheapest month to book a flight from San Diego to St. Augustine?
Currently, September is the cheapest month in which you can book a flight from San Diego to St. Augustine (average of $130). Flying from San Diego to St. Augustine in December is currently the most expensive (average of $241). 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 SAN to UST?
When flying from San Diego to St. Augustine, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 29% versus a flight at noon.
What is the cheapest day to fly from San Diego to St. Augustine?
Travelers seeking maximum savings on their San Diego to St. Augustine flight should consider departing on Friday afternoons 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.
How often are flights from San Diego to St. Augustine delayed?
About 15% of weekly flights between San Diego and St. Augustine have experienced delays in the past year, with the average delay time being 165 minutes.
What is the most punctual flight time for San Diego to St. Augustine flights?
Historically, flights departing at night are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
What day of the week experiences the fewest flight delays on this route?
Saturday tends to have the lowest number of delays on this route, whereas Sunday has historically faced a higher average of delays compared to other days of the week.
Which airline has the best punctuality record on San Diego to St. Augustine flights?
Over the last year, American Airlines have had the lowest number of delays on this route, with just 15% of flights being delayed.