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

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

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Flights from San Diego (SAN) to St. Louis (SUS)
Origin airport
San Diego Intl.
Destination airport
Spirit of St. Louis
Distance
1539 mi

San Diego to St. Louis Flights

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

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 San Diego to St. Louis are during the month of . You can find some of the cheapest flights from San Diego to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San Diego to St. Louis: 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 San Diego to St. Louis

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 San Diego to St. Louis in 2025. 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 San Diego to St. Louis 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 San Diego to St. Louis 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.

 

Frequently asked questions

How much does a flight from San Diego Intl. Airport (SAN) to Spirit of St. Louis Airport (SUS) cost?
Discover the latest flight deals from SAN to SUS by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SAN to SUS?
The cheapest flights from SAN to SUS are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SAN to SUS?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SAN to SUS. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from San Diego Intl. Airport (SAN) to Spirit of St. Louis Airport (SUS)?
There aren't any daily direct flights departing from San Diego Intl. Airport (SAN) to Spirit of St. Louis Airport (SUS). But you can book flights with layovers. Filter your search results on Expedia to include one or more stops, and you'll be cruising above the clouds before you know it.
What day of the week has the most flights from SAN to SUS?
Generally you'll have the most choice when it comes to flights on a Friday. Tuesdays tend to be the quietest.* But this can change based on the season, carrier and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from San Diego Intl. Airport (SAN) to Spirit of St. Louis Airport (SUS)?
To arrive at Spirit of St. Louis Airport (SUS) on time, opt for a flight that takes off from San Diego Intl. Airport (SAN) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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.
What airports do you fly into for St. Louis from San Diego Intl. Airport (SAN)?
Lambert-St. Louis Intl. Airport (STL) is the only airport in St. Louis with direct flights from San Diego Intl. Airport (SAN). Consider the available options and find affordable fares on Expedia.
Is it cheaper to buy a plane ticket from San Diego Intl. Airport (SAN) to Spirit of St. Louis Airport (SUS) last-minute?
Last-minute bookings from SAN to SUS are typically more expensive. For the lowest rates, start searching for flights well ahead of time. That being said, if you can play around with your travel dates, it's possible to find a cheap ticket right before your journey.
Is it cheaper to book a SAN to SUS flight and hotel package?
Securing a SAN to SUS flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Pick from our impressive range of stays and then add car rentals, flights and activities to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from San Diego Intl. Airport (SAN) to Spirit of St. Louis Airport (SUS)?
If you reserved your SAN to SUS flight within the last 24 hours, you may be able to cancel or modify it without fees. Depending on the airline and the fare type you purchased, additional charges may apply for changes after that time. Airline policies and contact information can be found in your itinerary or confirmation email. Or, go to our Customer Service portal if you want more information.

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