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Cheap flights from San Diego to St. Louis from $47

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 3/6. 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
8:00 am - 3:53 pm
SAN
-
STL
29h 53m
2 stops
Frontier Logo
8:12 pm - 11:08 pm
STL
-
SAN
28h 56m
1 stop
$153Frontier
Tue, Mar 3 - Sat, Mar 7
Frontier Logo
8:45 am - 11:59 pm
SAN
-
STL
37h 14m
2 stops
Frontier Logo
8:12 pm - 11:08 pm
STL
-
SAN
28h 56m
1 stop
$155Frontier
Wed, Mar 4 - Sat, Mar 7
Frontier Logo
8:00 am - 3:53 pm
SAN
-
STL
29h 53m
2 stops
Frontier Logo
1:59 pm - 11:28 am
STL
-
SAN
23h 29m
1 stop
$167Frontier
Tue, Feb 24 - Fri, Feb 27
Frontier Logo
8:35 am - 1:56 pm
SAN
-
STL
27h 21m
1 stop
Frontier Logo
1:54 pm - 12:08 am
STL
-
SAN
12h 14m
1 stop
$169Frontier
Fri, Feb 27 - Mon, Mar 2
Frontier Logo
8:00 am - 3:53 pm
SAN
-
STL
29h 53m
2 stops
Frontier Logo
8:12 pm - 8:33 pm
STL
-
SAN
26h 21m
1 stop
$172Frontier
Tue, Mar 3 - Fri, Mar 6
Frontier Logo
8:45 am - 11:59 pm
SAN
-
STL
37h 14m
2 stops
Frontier Logo
8:12 pm - 8:33 pm
STL
-
SAN
26h 21m
1 stop
$174Frontier
Wed, Mar 4 - Fri, Mar 6
Frontier Logo
8:47 am - 9:48 am
SAN
-
STL
23h 01m
1 stop
Frontier Logo
8:16 pm - 11:06 pm
STL
-
SAN
28h 50m
1 stop
$190Frontier
Thu, Apr 9 - Mon, Apr 13
Frontier Logo
9:18 pm - 9:49 am
SAN
-
STL
10h 31m
1 stop
Frontier Logo
10:47 pm - 9:28 pm
STL
-
SAN
24h 41m
1 stop
$195Frontier
Thu, Mar 12 - Sun, Mar 15
Frontier Logo
9:59 pm - 11:19 am
SAN
-
STL
11h 20m
1 stop
Frontier Logo
8:12 pm - 9:14 pm
STL
-
SAN
27h 02m
1 stop
$197Frontier
Thu, Mar 26 - Mon, Mar 30
Frontier Logo
2:47 pm - 9:00 pm
SAN
-
STL
28h 13m
1 stop
Frontier Logo
8:12 pm - 8:34 am
STL
-
SAN
14h 22m
1 stop
$201Frontier
Wed, Apr 15 - Sat, Apr 25

Delta flights from San Diego to St. Louis

Our best Delta deals on San Diego to St. Louis flight tickets
Delta
Mar 3
SAN3:10 pmSan Diego
6h 13m
1 stop
STL11:23 pmLambert-St Louis
Mar 6
STL6:40 pmLambert-St Louis
7h 06m
1 stop
SAN11:46 pmSan Diego
$317
Delta
May 5
SAN11:40 amSan Diego
10h 45m
2 stops
STL12:25 amLambert-St Louis
May 12
STL2:27 pmLambert-St Louis
10h 05m
2 stops
SAN10:32 pmSan Diego
$333
Delta
May 5
SAN10:30 pmSan Diego
8h 00m
1 stop
STL8:30 amLambert-St Louis
May 12
STL2:27 pmLambert-St Louis
10h 05m
2 stops
SAN10:32 pmSan Diego
$358

Frontier flights from San Diego to St. Louis

Our best Frontier deals on San Diego to St. Louis flight tickets
Frontier
Mar 3
SAN8:00 amSan Diego
29h 53m
2 stops
STL3:53 pmLambert-St Louis
Mar 7
STL8:12 pmLambert-St Louis
28h 56m
1 stop
SAN11:08 pmSan Diego
$153
Frontier
Mar 4
SAN8:45 amSan Diego
37h 14m
2 stops
STL11:59 pmLambert-St Louis
Mar 7
STL8:12 pmLambert-St Louis
28h 56m
1 stop
SAN11:08 pmSan Diego
$155
Frontier
Feb 24
SAN8:00 amSan Diego
29h 53m
2 stops
STL3:53 pmLambert-St Louis
Feb 27
STL1:59 pmLambert-St Louis
23h 29m
1 stop
SAN11:28 amSan Diego
$167

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 February 3, 2026.
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

Tue 3/3

8:00 am-3:53 pm

2 stops29h 53m

Lambert-St Louis

Sat 3/7

8:12 pm-11:08 pm

1 stop28h 56m

$153

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Wed 3/4

8:45 am-11:59 pm

2 stops37h 14m

Lambert-St Louis

Sat 3/7

8:12 pm-11:08 pm

1 stop28h 56m

$155

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 2/24

8:00 am-3:53 pm

2 stops29h 53m

Lambert-St Louis

Fri 2/27

1:59 pm-11:28 am

1 stop23h 29m

$167

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Fri 2/27

8:35 am-1:56 pm

1 stop27h 21m

Lambert-St Louis

Mon 3/2

1:54 pm-12:08 am

1 stop12h 14m

$169

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 3/3

8:00 am-3:53 pm

2 stops29h 53m

Lambert-St Louis

Fri 3/6

8:12 pm-8:33 pm

1 stop26h 21m

$172

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Wed 3/4

8:45 am-11:59 pm

2 stops37h 14m

Lambert-St Louis

Fri 3/6

8:12 pm-8:33 pm

1 stop26h 21m

$174

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Thu 4/9

8:47 am-9:48 am

1 stop23h 01m

Lambert-St Louis

Mon 4/13

8:16 pm-11:06 pm

1 stop28h 50m

$190

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Thu 3/12

9:18 pm-9:49 am

1 stop10h 31m

Lambert-St Louis

Sun 3/15

10:47 pm-9:28 pm

1 stop24h 41m

$195

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Thu 3/26

9:59 pm-11:19 am

1 stop11h 20m

Lambert-St Louis

Mon 3/30

8:12 pm-9:14 pm

1 stop27h 02m

$197

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Wed 4/15

2:47 pm-9:00 pm

1 stop28h 13m

Lambert-St Louis

Sat 4/25

8:12 pm-8:34 am

1 stop14h 22m

$201

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 $335.

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 Thursday when prices can be found for as low as $416. 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 Monday because tickets tend to average around $616. 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 at noon is the least expensive time of day to depart. momondo users have found prices as low as $428 when looking at flights departing at noon. In the morning is when there is more demand to fly to St. Louis, so prices are often more expensive at around $483 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 $389 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 $306 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 7% 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 February 2026, prices for San Diego to St. Louis flights are approximately 7% more expensive 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 $393.
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 in St. Louis. From San Diego there are direct flights to 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 $140Free CancellationRating
5.7
3,051 reviews
Search Frontier flights
DeltaPriceFrom $148Free CancellationRating
7.9
8,138 reviews
Search Delta flights
American AirlinesPriceFrom $249Free CancellationRating
7.2
11,216 reviews
Search American Airlines flights
United AirlinesPriceFrom $256Free CancellationRating
7.4
9,236 reviews
Search United Airlines flights
SouthwestPriceFrom $306Free CancellationRating
8.0
4,272 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 4 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 $484. 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
Collinsville
St. Peters
Fenton
Wentzville
Alton
Farmington
Clayton
Edwardsville
Eureka
Festus
Litchfield
Glencoe
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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