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

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The best prices from Lambert-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 Wednesday

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

All the information you need to plan the best STL to SAN flight in 2021: compare St. Louis to San Diego flight prices with the expected peak season, weather and rainfall in San Diego.
STL - SAN
Price
$243 - $345
SAN
Temperature
57.2 - 71.6 °F
SAN
Precipitation
0 - 2.3 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 Lambert-St Louis to San Diego

One-way from

$124

One-way flight from Lambert-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.
How far in advance should I book a flight from St. Louis to San Diego?

Travelers have found it’s best to book a flight 40 days in advance to save up to 30% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 40 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from St. Louis to San Diego 1-2 weeks in advance for as low as $303, or $395 for flights within the next 24 hours.

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

Unlike in the afternoon, when flights are generally more expensive, you can save up to 14% on flights from St. Louis to San Diego by exploring options for tickets in the evening.

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

The best pricing can be found in the month of August. Prices to San Diego from St. Louis average $285. You can even find prices in August for less than $285, as users have found deals to San Diego from as low as $148. The month of March 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 21%.

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

Flying to your destination on a Saturday can be more expensive, but this shouldn’t discourage you from finding affordable options to get to San Diego. Check prices with Cheapflights to find a great deal for your trip.

Cheap flights from St. Louis to San Diego in October, November 2021

The best prices found for STL to SAN flights for October, November
3 Nov - 8 Nov
$116pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
3 Nov - 13 Nov
$124pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
10 Nov - 15 Nov
$127pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

Lambert-St Louis to San Diego 2021 flight deals

Cheap flights to San Diego from St. Louis found for this year
3 Nov - 8 Nov
$116pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
3 Nov - 13 Nov
$124pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis
10 Nov - 15 Nov
$127pp
STL
Lambert-St Louis
Spirit Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Spirit Airlines
 
1 STOP
STL
Lambert-St Louis

Last minute flights from St. Louis to San Diego

Late deals on round-trip flights to San Diego from St. Louis, departing today and this week
25 Oct - 30 Oct
$148pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis
25 Oct - 30 Oct
$189pp
STL
Lambert-St Louis
Multiple Airlines
 
1 STOP
SAN
San Diego
SAN
San Diego
Multiple Airlines
   
2 STOPS
STL
Lambert-St Louis
21 Oct - 26 Oct
$234pp
STL
Lambert-St Louis
Frontier
 
1 STOP
SAN
San Diego
SAN
San Diego
Frontier
 
1 STOP
STL
Lambert-St Louis

One-way flights to San Diego from St. Louis

The cheapest one-way flights from St. Louis to San Diego
3:03 pm - 6:53 am
Multiple Airlines
3 Stops
41h 50m
STL - SAN
Multiple Airlines
$124
Kiwi.com
6:50 am - 10:56 am
Spirit Airlines
2 Stops
30h 06m
STL - SAN
Spirit Airlines
$145
Gotogate
4:30 am - 1:53 pm
Frontier
3 Stops
35h 23m
STL - SAN
Frontier
$150
FlightHub

Related info for your journey

Useful info, stats and facts about <span class="emphasized">St. Louis</span> to <span class="emphasized">San Diego</span> flights.

Flight FAQs

From St. Louis to San Diego

What airports do I use to fly from St. Louis to San Diego?

If you book a flight from St. Louis to San Diego, you will be flying from Lambert-St Louis to San Diego. Flights to San Diego (SAN) from Lambert-St Louis (STL) take 7h 00m for a nonstop flight. There is 1 flight from Lambert-St Louis to San Diego per day from 7 airlines.

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 $200 on Cheapflights?

Yes, there are multiple flights from St. Louis to San Diego for under $200. The cheapest flight booked recently is on Multiple Airlines for just $116, but on average you can expect to pay $142.

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 St. Louis to San Diego flight route?

Within the past month, 105 users have taken a look at flights from Lambert-St Louis to San Diego.

What are the cheapest airlines flying from St. Louis to San Diego round-trip?

Flying on Spirit Airlines is currently your cheapest option to San Diego, with prices starting at $127. Another option worth looking into is Frontier, starting at $128 round trip. You may be able to fly from St. Louis to San Diego for 55% less than the average price by searching for these airlines.

What are the most popular airlines that fly from St. Louis to San Diego?

Consider Major Airline, American Airlines or Alaska Airlines when booking your flight. These represent the most popular airlines when flying from St. Louis to San Diego.

What are the cheapest flights from St. Louis to San Diego?

Looking for the cheapest flight from St. Louis to San Diego? While on average our users pay $533, our data indicates the cheapest price to be $113. The most popular route (Lambert-St Louis - San Diego), is priced around $120.

COVID Restrictions

View COVID Travel Restrictions for San Diego, CA

Do I need a COVID test to fly to San Diego from St. Louis?

Information is based on travel restrictions for travel to San Diego within the United States

Most visitors from Lambert-St Louis need to provide a negative COVID-19 test result and/or quarantine to enter San Diego.

COVID-19 testing requirements
Visitors from Lambert-St Louis must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to San Diego.

Quarantine requirements
Visitors from Lambert-St Louis are not required to quarantine after entering San Diego.

Do I need a test to fly back to St. Louis from San Diego?

Returning to Lambert-St Louis from San Diego

COVID-19 testing requirements
Visitors from San Diego must present a negative RT-PCR (NAAT) or Antigen (quick-test) test taken 72 hours before departing to Lambert-St Louis.

Quarantine requirements
Visitors from San Diego are not required to quarantine after entering Lambert-St Louis.

Hide COVID Travel Restrictions for San Diego, CA

Alternative routes for St. Louis to San Diego

See prices for flight routes from nearby airports that may be better suited for you.

Destination information for San Diego

Things to know before you go - useful duration and weather info for your trip from St. Louis to San Diego.
Average temperature for October in San Diego
77.0 °F
Avg rainfall for October in San Diego
0.6 ″

Airports servicing St. Louis

Airports servicing San Diego

Top 6 airlines flying from Lambert-St Louis to San Diego

The chart below displays the airlines Cheapflights users traveling from St. Louis to San Diego choose most often. Cheapest and average prices are based on aggregated data from the past 12 months.
Airline Cheapest Average Flexibility On-time COVID-19 safety
Delta
$117 $258 No cancel fee N/A
United Airlines
$117 $258 No cancel fee 69%
Frontier
$118 $242 No cancel fee 62%
American Airlines
$122 $301 No cancel fee 71%
Alaska Airlines
$128 $290 No cancel fee 75%
Southwest
$281 $490 No cancel fee 63%

Hourly flight availability from St. Louis to San Diego

See what time of day planes typically take off from St. Louis towards San Diego.
Afternoon Noon to 6 PM 100% of STL to SAN departures
Early morning Midnight to 6 AM 0% of STL to SAN departures
Morning 6 AM to noon 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
See how many times per day planes take to the skies headed from St. Louis to San Diego.
Sunday
0 flights
Monday
1 daily flight
Tuesday
0 flights
Wednesday
0 flights
Thursday
1 daily flight
Friday
1 daily flight
Saturday
4 daily flights
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