Cheap flights from St Louis to San Diego (STL - SAN)

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The best prices from St Louis to San Diego are usually found in August or September, booked 41 days in advance, depart on a Tuesday or Wednesday and return on a Thursday

How to find the cheapest flight from
St Louis (STL) to San Diego (SAN)

STL - SAN
Price
$243 - $345
SAN
Temperature
66.2 - 80.6 °F
SAN
Rainfall
0 - 2.8 inches

Popular in

March

High demand for flights, 17% potential price rise

Cheapest in

August

Best time to find cheap flights, 15% potential price drop

Round-trip from

$243

From St Louis to San Diego

One-way from

$133

One-way flight from St Louis to San Diego

Flight route prices based on searches on Cheapflights within the last 3 days, monthly prices based on aggregated historical data.
What is the cheapest day to fly round-trip from St Louis to San Diego?

Flights from St Louis to San Diego are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to San Diego.

How far in advance should I book a flight from St Louis to San Diego?

When searching for a good deal, it’s best to be prepared for potential fluctuations in price. We recommend booking at least 17 days in advance, which can save you up to 27% on flights from St Louis to San Diego compared to booking the week you need them. Waiting 17 days out may not be for everyone, so we have options available for flights within the next two weeks, with the lowest price starting at $73. For sooner than that we have options available in the next 3 days from $98.

What is the cheapest month to fly from St Louis to San Diego?

The best pricing can be found in the month of July. Prices to San Diego from St Louis average $80. You can even find prices in July for less than $80, as users have found deals to San Diego from as low as $44. The month of December appears to be one of the more expensive times to travel to San Diego from St Louis. Flying in the targeted month can save you up to 33%.

When is the cheapest time to fly from St Louis to San Diego (STL - SAN)?

A simple way to save on the total cost of your ticket is to fly from St Louis to San Diego in the evening. If you’re flexible enough to do this you can expect to save up to 16% on your trip compared to booking a flight in the afternoon.

Cheap flights from St Louis to San Diego in March, April 2021

9 Apr - 12 Apr
$68pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis
15 Mar - 31 Mar
$73pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis
15 Mar - 17 Mar
$74pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis

St Louis to San Diego 2021 flight deals

9 Apr - 12 Apr
$68pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis
15 Mar - 31 Mar
$73pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis
15 Mar - 17 Mar
$74pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis

Last minute flights from St Louis to San Diego

10 Mar - 17 Apr
$108pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis
9 Mar - 17 Mar
$125pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis
7 Mar - 17 Mar
$133pp
STL
Lambert-St Louis
Frontier
   
2 STOPS
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis

One-way flights to San Diego from St Louis

3:09 pm - 5:20 am
Frontier
2 Stops
16h 11m
STL - SAN
Frontier
$133
Kiwi.com
3:05 am - 3:19 pm
American Airlines
2 Stops
14h 14m
STL - SAN
American Airlines
12:44 am - 7:50 am
Delta
1 Stop
9h 06m
STL - SAN
Delta
$380
Delta

Related info for your journey

Flight FAQs

From St Louis to San Diego

Are flight prices decreasing from St Louis to San Diego due to COVID-19 (coronavirus)?

At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both St Louis and San Diego for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.

What safety measures are being taken by airlines flying from Lambert-St Louis to San Diego to control the spread of COVID-19?

Alaska Airlines and Delta are some of the many airlines that have implemented additional safety measures to control the spread of COVID-19. New policies for travelers booking flights from Lambert-St Louis to San Diego include masks being provided and required on board, daily cleaning and sanitization, use of HEPA filters, pre-flight testing for antibodies and symptoms, and socially distanced seating (for a limited time). Keep in mind that policies will vary by airline.

Which airlines flying from Lambert-St Louis to San Diego have flexible cancellations due to COVID-19?

Due to the rapidly changing circumstances due to COVID-19, airlines like Alaska Airlines, American Airlines, and United Airlines flying from Lambert-St Louis to San Diego have implemented new flexible cancellation policies.

Can I find flights from St Louis to San Diego for under $100 on Cheapflights?

Yes, there are multiple flights from St Louis to San Diego for under $100. The cheapest flight booked recently is on Frontier for just $68, but on average you can expect to pay $114.

Are there nonstop flights from St Louis to San Diego for under $100 on Cheapflights?

There are no nonstop flights from St Louis to San Diego, but Cheapflights can provide you with all the information you need to find the fastest route with the fewest stops.

Are there last-minute flights available from St Louis to San Diego for under $200?

There are currently 20+ open flights from St Louis to San Diego within the next 7 days for less than $200.

How popular is this flight route?

The Lambert-St Louis to San Diego flight path was viewed by 105 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

Does it rain more in St Louis or San Diego?

St Louis will have greater rainfall in 0 compared to San Diego over the next 15 days.

Is St Louis weather warmer or cooler than San Diego?

You can imagine temperatures to be in the 90 °F range in July. The weather in San Diego is generally colder than St Louis's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.

How long is the flight from St Louis to San Diego?

Departing from St Louis to San Diego will take you 5h 49m.

What is the cheapest airline to fly from St Louis to San Diego round-trip?

Our cheapest airline available from St Louis to San Diego is Frontier. Our recent data shows that you can find tickets from as low as $68 on this airline. Users have found that Frontier is 76% cheaper than the other options available to this destination.

What are the cheapest airlines to fly from St Louis to San Diego one-way?

For one-way options, check prices for Frontier. According to our data, you can fly for as low as $34. Users have also found prices from $140 and $201 on Frontier and American Airlines, respectively.

Alternative routes for St Louis to San Diego

Destination information for San Diego

Average temperature for March in San Diego
68.0 °F
Avg rainfall for March in San Diego
2.7 ″

Airports servicing St. Louis

Airports servicing San Diego

Top 6 airlines flying from St Louis to San Diego

Airline Cheapest Average Flexibility On-time COVID-19 safety
Frontier
$118 $242 No cancel fee 62%
Delta
$117 $258 No cancel fee N/A
United Airlines
$117 $258 No cancel fee 69%
Alaska Airlines
$128 $290 No cancel fee 75%
American Airlines
$122 $301 No cancel fee 71%
Southwest
$281 $490 No cancel fee 63%

Hourly flight availability from St Louis to San Diego

Morning 6 AM to noon 100% of STL to SAN departures
Early morning Midnight to 6 AM 0% of STL to SAN departures
Afternoon Noon to 6 PM 0% of STL to SAN departures
Evening 6 PM to midnight 0% of STL to SAN departures
Midnight
6 AM
Noon
6 PM
Weekly flight availability
from St Louis to San Diego
Sunday
1 daily flight
Monday
1 daily flight
Tuesday
1 daily flight
Wednesday
1 daily flight
Thursday
1 daily flight
Friday
1 daily flight
Saturday
1 daily flight
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