Cheap Flights from SAN to STL: When to Fly from San Diego to St. Louis

 

The cheapest times to fly from SAN to STL are

• January 1st to February 25th
• April 9th to April 29th (except the week of April 16th)
• August 6th to December 9th (except the weeks of November 19th and November 26th)

based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from SAN to STL is early to mid September. Prices can be as high as $1020 for Sunday flights during late July, or as low as $227 for Tuesday flights around early to mid September.

 

When to Fly to St. Louis

Flying from San Diego, CA (SAN) to St. Louis, MO (STL) will usually cost between $236 to $486 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid September with an average ticket price of $257. Due to high demand the most expensive time to fly is late July, with an average price of $473. Planning your trip to low-cost times can easily save you $216 on economy flights and even more on first-class flights. Generally, any price below $286 can be considered a good price for a round-trip SAN to STL flight.

See below for a graph of average weekly prices for the SAN to STL route. All prices are for round-trip tickets in USD.

Compared to other flights, the SAN to STL flight is much cheaper than the average and costs much less than the average flight leaving from San Diego. The average price per mile (for a direct flight) is $0.11, which is far below average.

 

Flight Prices by Day of the Week

Tuesday is usually the cheapest day to depart and return on this flight. Sundays are the most expensive days to fly out or take a return trip. Selecting flights on the least expensive days could save you up to $114 (29%) on this flight.

Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Tuesday and returning a week later will cost an average of $275. Return trip prices are from the STL to SAN flight, and often highlight the quality of our data in showing the same trend.

 

Nonstop Flights and Layovers

Travelers looking to fly from SAN to STL can generally find a 0-layover flight. Because there is a direct flight option the real-world direct flight time of 3 hour 47 minutes may be realistic.

 

Flight Questions Answered

Still have questions about flying from SAN to STL? We’ve got answers.

Which airlines fly this route?

You can find 8 major airlines flying this route most often: Alaska, American, Delta, Frontier, Singapore Airlines, Southwest, Sun Country Airlines, United, and potentially more during busy seasons.

How far away is it from St Louis Lambert International Airport to San Diego International Airport?

The distance between the two airports is roughly 1554 miles or 2501 kilometers.

How long does it take to fly from SAN to STL?

The real-world flight time for a nonstop SAN to STL flight is about 3 hour 47 minutes.

How many flights go between San Diego, CA and St. Louis, MO?

It depends on the day of the week and the date, but a typical day might have around 116 available flights from SAN to STL.

 

Airport Location Info

 

 

Late and Early Flight Data

Flights from SAN to STL tend to depart later than the average flight. According to our recently updated data, 35% of flights departed 5 or more minutes late, and 8% of flights left 5 or more minutes early. On average you can expect to leave STL heading for SAN about 6 minutes late. This does significantly impact arrival time, as the average landing time in St. Louis, MO is about 3 minutes late. The numbers below show a recent average of take-off times versus the scheduled departure flight:

• Southwest: 6 minutes late
• Some airlines not reporting

 

Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.