Cheap Flights from St. Louis (SUS) to San Diego (SAN)

Popular airlines from St. Louis, MO (SUS-Spirit of St. Louis) to San Diego Intl. Airport (SAN)

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Frequently asked questions

How much does a flight from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN) cost?
Grab a cheap one-way flight or cheap return flight from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN)?
The cheapest month to fly from SUS to SAN is , when there's less demand. Off-peak season is usually when airlines offer lower prices between these airports.
Which airlines fly direct from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN)?
You can't catch a nonstop flight to San Diego Intl. Airport (SAN) from St. Louis, MO (SUS-Spirit of St. Louis). However, you can easily reach San Diego without any layovers by departing from Lambert-St. Louis Intl. Airport (STL).
What is the cheapest airline that flies from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from SUS to SAN. Then, sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN)?
Direct flights from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and choose either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SUS to SAN?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on a number of factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN)?
To arrive at San Diego Intl. Airport (SAN) on schedule, pick a flight that takes off from Spirit of St. Louis Airport (SUS) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN) last-minute?
Booking your ticket from SUS to SAN right before your trip is usually more expensive. But if you're flexible with your travel dates and times, you could score a cheap last-minute fare.
Is it cheaper to book a SUS to SAN flight and hotel package?
You can save money by securing a SUS to SAN flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage it all in one convenient place. After choosing your ideal flights and accommodations, consider adding extras including car rentals, tours and activities.
Can I cancel or change the date of my flight from Spirit of St. Louis Airport (SUS) to San Diego Intl. Airport (SAN)?
In most instances, you can reschedule or cancel your SUS to SAN flight. However, additional charges may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's fees and policies on flight changes, or if you'd like further information, head to our Customer Service portal.

Travel information

Origin airport
Spirit of St. Louis
Destination airport
San Diego Intl.
Distance
1539 mi

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St. Louis to San Diego Flights

The cheapest times to fly from St. Louis to San Diego

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to San Diego are during the month of . You can find some of the cheapest flights from St. Louis to San Diego with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to San Diego

Sunday is one of the best days to book for cheap flights from St. Louis to San Diego: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to San Diego

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to San Diego in 2026. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to San Diego flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to San Diego airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

St. Louis to San Diego Flights

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