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Cheap flights from San Diego to St. Louis from $61

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from San Diego to St. Louis departing on 12/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from San Diego to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:34 am - 10:14 amSAN-STL
25h 40m1 stop
Frontier Logo
7:43 pm - 7:15 pmSTL-SAN
25h 32m1 stop
$124Frontier
Find Deal
mar., dic. 16 - mié., dic. 17
Frontier Logo
6:41 am - 9:07 amSAN-STL
24h 26m1 stop
Frontier Logo
7:45 pm - 9:39 pmSTL-SAN
27h 54m1 stop
$130Frontier
Find Deal
sáb., nov. 15 - mar., nov. 18
Frontier Logo
6:41 am - 9:07 amSAN-STL
24h 26m1 stop
Frontier Logo
7:45 pm - 10:25 pmSTL-SAN
28h 40m1 stop
$137Frontier
Find Deal
mié., nov. 12 - vie., nov. 14
Delta Logo
6:15 am - 3:05 pmSAN-STL
6h 50m1 stop
Delta Logo
7:05 am - 1:02 pmSTL-SAN
7h 57m1 stop
$253Delta
Find Deal
jue., nov. 27 - jue., dic. 4
Southwest Logo
2:05 pm - 10:10 pmSAN-STL
6h 05m1 stop
Southwest Logo
3:15 pm - 5:15 pmSTL-SAN
4h 00mnonstop
$293Southwest
Find Deal
mar., dic. 16 - mié., dic. 17
United Airlines Logo
2:16 pm - 10:45 pmSAN-STL
6h 29m1 stop
United Airlines Logo
1:35 pm - 7:52 pmSTL-SAN
8h 17m2 stops
$305United Airlines
Find Deal
sáb., dic. 6 - mar., dic. 9
United Airlines Logo
12:42 pm - 10:22 pmSAN-STL
7h 40m1 stop
United Airlines Logo
5:02 pm - 10:51 pmSTL-SAN
7h 49m1 stop
$319United Airlines
Find Deal
mié., dic. 24 - jue., dic. 25
Southwest Logo
10:20 am - 8:00 pmSAN-STL
7h 40m1 stop
Southwest Logo
9:55 am - 11:55 amSTL-SAN
4h 00mnonstop
$321Southwest
Find Deal
mié., dic. 10 - vie., dic. 12
American Airlines Logo
12:43 pm - 10:47 pmSAN-STL
8h 04m1 stop
American Airlines Logo
7:00 am - 12:40 pmSTL-SAN
7h 40m1 stop
$325American Airlines
Find Deal
mié., dic. 10 - dom., dic. 14
American Airlines Logo
4:25 pm - 11:51 pmSAN-STL
5h 26m1 stop
American Airlines Logo
5:17 am - 9:55 amSTL-SAN
6h 38m1 stop
$333American Airlines
Find Deal
lun., nov. 24 - mar., dic. 2

Delta flights from San Diego to St. Louis

Our best Delta deals on San Diego to St. Louis flight tickets
Delta
Nov 27
SAN6:15 amSan Diego
6h 50m
1 stop
STL3:05 pmLambert-St Louis
Dec 4
STL7:05 amLambert-St Louis
7h 57m
1 stop
SAN1:02 pmSan Diego
$253
Find similar
Delta
Nov 4
SAN11:00 amSan Diego
9h 04m
1 stop
STL10:04 pmLambert-St Louis
Nov 6
STL3:59 pmLambert-St Louis
9h 15m
1 stop
SAN11:14 pmSan Diego
$539
Find similar

Frontier flights from San Diego to St. Louis

Our best Frontier deals on San Diego to St. Louis flight tickets
Frontier
Dec 16
SAN6:34 amSan Diego
25h 40m
1 stop
STL10:14 amLambert-St Louis
Dec 17
STL7:43 pmLambert-St Louis
25h 32m
1 stop
SAN7:15 pmSan Diego
$124
Find similar
Frontier
Nov 15
SAN6:41 amSan Diego
24h 26m
1 stop
STL9:07 amLambert-St Louis
Nov 18
STL7:45 pmLambert-St Louis
27h 54m
1 stop
SAN9:39 pmSan Diego
$130
Find similar
Frontier
Nov 12
SAN6:41 amSan Diego
24h 26m
1 stop
STL9:07 amLambert-St Louis
Nov 14
STL7:45 pmLambert-St Louis
28h 40m
1 stop
SAN10:25 pmSan Diego
$137
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from San Diego to St. Louis that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated octubre 30, 2025.
Use the filters below to find and compare flights from San Diego to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

mar. 12/16

6:34 am-10:14 am

1 stop25h 40m

Lambert-St Louis

mié. 12/17

7:43 pm-7:15 pm

1 stop25h 32m

$124

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

sáb. 11/15

6:41 am-9:07 am

1 stop24h 26m

Lambert-St Louis

mar. 11/18

7:45 pm-9:39 pm

1 stop27h 54m

$130

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

mié. 11/12

6:41 am-9:07 am

1 stop24h 26m

Lambert-St Louis

vie. 11/14

7:45 pm-10:25 pm

1 stop28h 40m

$137

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

jue. 11/27

6:15 am-3:05 pm

1 stop6h 50m

Lambert-St Louis

jue. 12/4

7:05 am-1:02 pm

1 stop7h 57m

$253

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

mar. 12/16

2:05 pm-10:10 pm

1 stop6h 05m

Lambert-St Louis

mié. 12/17

3:15 pm-5:15 pm

Nonstop4h 00m

$293

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

sáb. 12/6

2:16 pm-10:45 pm

1 stop6h 29m

Lambert-St Louis

mar. 12/9

1:35 pm-7:52 pm

2 stops8h 17m

$305

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

mié. 12/24

12:42 pm-10:22 pm

1 stop7h 40m

Lambert-St Louis

jue. 12/25

5:02 pm-10:51 pm

1 stop7h 49m

$319

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

mié. 12/10

10:20 am-8:00 pm

1 stop7h 40m

Lambert-St Louis

vie. 12/12

9:55 am-11:55 am

Nonstop4h 00m

$321

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

mié. 12/10

12:43 pm-10:47 pm

1 stop8h 04m

Lambert-St Louis

dom. 12/14

7:00 am-12:40 pm

1 stop7h 40m

$325

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

lun. 11/24

4:25 pm-11:51 pm

1 stop5h 26m

Lambert-St Louis

mar. 12/2

5:17 am-9:55 am

1 stop6h 38m

$333

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from San Diego to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, September is the cheapest month to fly from San Diego to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $271. The month of February is another great option to travel to St. Louis, with average flight prices from San Diego averaging around $307.

What is the cheapest day to depart on your flight to St. Louis?

The cheapest day to depart on your flight to St. Louis is on a Friday when prices can be found for as low as $434. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Sunday because tickets tend to average around $536. These prices are subject to change though, so be sure to set up a Price Alert for flights to St. Louis.

What is the cheapest time of day to depart on your flight to St. Louis?

Flying to St. Louis from San Diego in the evening is the least expensive time of day to depart. momondo users have found prices as low as $198 when looking at flights departing in the evening. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $475 per ticket.

What is the cheapest San Diego to Lambert-St Louis flight route?

Fly from San Diego to Lambert-St Louis for the best San Diego - Lambert-St Louis flight prices

How far in advance should I book a flight to St. Louis?

You are more likely to see cheaper flights to St. Louis from San Diego when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $377 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from San Diego for as low as $303 on momondo.

What cabin class options are available on San Diego to Lambert-St Louis flights?

There is only 1 cabin class available to choose from on San Diego to Lambert-St Louis flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on San Diego to St. Louis flights?

You could potentially save up to 32% on your flight if you consider stops on a San Diego to St. Louis flight.

How have San Diego to St. Louis flight prices changed over time?

As of October 2025, prices for San Diego to St. Louis flights are approximately 8% cheaper when compared to flights at the same time last year.

When to book flights from San Diego to St. Louis

Are you open to changing your travel dates? Check out the ideal times to fly from San Diego to St. Louis according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap San Diego to St. Louis (SAN to STL) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from San Diego to St. Louis

Best Price Found

$214

Fastest flight time

3h 30m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from San Diego in the past 72 hours is $214. The best round-trip flight deal from San Diego to St. Louis found on momondo in the last 72 hours is $318.
The fastest flight from San Diego to St. Louis takes 3h 30m
Direct flights go from San Diego to St. Louis every day.
There is 1 airport near St. Louis: Lambert-St Louis (STL)
Search flight deals

  • How far is San Diego to Lambert-St Louis by plane?

    Lambert-St Louis is 1560.0 mi away from San Diego. 3h 30m is a normal flight duration for this route.

  • When did momondo last update prices for flights from San Diego Airport to Lambert-St Louis Airport?

    Prices for flights from San Diego Airport to Lambert-St Louis Airport refresh daily.

  • How many operators does momondo search for flights from San Diego Airport to Lambert-St Louis Airport?

  • How old do you have to be to fly from San Diego Airport to Lambert-St Louis Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from San Diego Airport to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The travel and health documents you'll need for your trip to Lambert-St Louis Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Lambert-St Louis Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from San Diego to St. Louis?

  • What is the most popular airline from San Diego to St. Louis?

Best airlines flying from San Diego to St. Louis

Compare and see reviews for airlines that fly from San Diego to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $128Free CancellationRating
5.8
3,122 reviews
Search Frontier flights
DeltaPriceFrom $184Free CancellationRating
7.9
7,998 reviews
Search Delta flights
American AirlinesPriceFrom $249Free CancellationRating
7.2
11,035 reviews
Search American Airlines flights
United AirlinesPriceFrom $256Free CancellationRating
7.4
8,998 reviews
Search United Airlines flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,243 reviews
Search Southwest flights

  • Southwest Flights From San Diego to St. Louis

    Southwest is one of the most popular airlines flying from San Diego to St. Louis, operating 2 flights/week on average for this route. A good Southwest flight deal for San Diego to St. Louis starts from $306 round-trip, up to an average price of $474. Our users have rated Southwest at 8.0/10.

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
Florissant
O'Fallon
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
Eureka
Litchfield
Shrewsbury

Why use momondo?

Why should I use momondo to find a flight deal from San Diego to St. Louis?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from San Diego to St. Louis. momondo saves you time and could save you money on your trip.

Can I find flights from San Diego to St. Louis with flexible booking policies on momondo?

Flights from San Diego to St. Louis with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from San Diego to St. Louis?

Once all potential San Diego to St. Louis flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from San Diego to St. Louis right now. Can momondo alert me if prices change?

If you are not ready to book a flight from San Diego to St. Louis now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to St. Louis and let you know when they change.

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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