STL to SAN Flight Guide: Fly from the Gateway Arch to America’s Finest City
Cheapest flight found
$144
Last updated Mar 13, 2026
Prices by Month
Price History
Tracking the Jun 4, 2026 departure — the cheapest date we found.
Price Behavior: STL → SAN
Based on 6 months of fare data collected by Trip Manta.
Lowest Fare
$144
Highest Fare
$199
Median Fare
$179
Price Spread
$55
Prices fluctuate moderately — tracking can help you catch dips.
Cheapest month to fly: June 2026 (from $144)
Most expensive month: July 2026 (from $199)
Biggest price drop caught: $40 between consecutive checks
Most frequent cheapest airline: Southwest
What This Means for You
Flights from St. Louis to San Diego range from $144 to $199, a $55 spread across the months we track. If your dates are flexible, June 2026 tends to have the lowest fares. Prices move enough that tracking can save you money — drops often last only a few hours before the algorithm adjusts back up. We have caught drops as large as $40 between hourly checks on this route.
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From
St. Louis (STL)
To
San Diego (SAN)
Airport Information
St. Louis (STL)
St. Louis Lambert International Airport (STL) serves as the primary gateway for the Missouri and Illinois bi-state area, boasting a rich history as one of the nation's earliest aviation hubs. It features two main terminals, with Terminal 2 serving as a significant hub for Southwest Airlines, which is a major player for the STL to SAN route. The airport offers numerous dining options, including local favorites like Imo's Pizza and Schlafly Beer, ensuring travelers can get a final taste of St. Louis culture before departing for the West Coast.
San Diego (SAN)
San Diego International Airport (SAN), also known as Lindbergh Field, is uniquely situated just three miles northwest of Downtown San Diego, offering passengers breathtaking views of the skyline and the harbor during their final approach. As the busiest single-runway commercial airport in the United States, it provides efficient transit through its two modern terminals. Travelers will find a wealth of local San Diego-inspired amenities, including beach-themed boutiques and restaurants that highlight the region's famous fish tacos and craft beer culture immediately upon landing.
Frequently Asked Questions
How long is the flight from STL to SAN?
A direct, non-stop flight typically takes about 3 hours and 45 minutes to 4 hours, covering a distance of approximately 1,550 miles.
Which airlines offer non-stop service on this route?
Southwest Airlines is currently the primary carrier offering direct, non-stop flights between St. Louis and San Diego, though other carriers like American, United, and Delta offer frequent connecting service.
What is the time difference between St. Louis and San Diego?
San Diego is in the Pacific Time Zone, which is two hours behind St. Louis's Central Time Zone.
Is there easy public transportation from SAN to the city center?
Yes, the San Diego Metropolitan Transit System (MTS) Route 992 bus provides frequent service from both airport terminals directly to the heart of Downtown San Diego and the Santa Fe Depot.
When is the best time to visit San Diego for warm weather?
While San Diego is a year-round destination, the months of September and October often provide the warmest water temperatures and the clearest sunny skies, avoiding the early summer coastal clouds.
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