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Cheap flights from California to St. Louis from $33

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from California to St. Louis departing on 2/13. 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 California to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:10 pm - 9:26 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
6:41 pm - 8:31 pm
STL
-
LAS
3h 50mnonstop
$67Frontier
Thu, Feb 12 - Sat, Feb 14
Frontier Logo
4:10 pm - 9:26 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
$68Frontier
Fri, Feb 20 - Mon, Feb 23
Frontier Logo
4:10 pm - 9:26 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
$88Frontier
Fri, Feb 13 - Fri, Feb 20
Multiple Airlines Logo
6:45 am - 5:46 pm
SNA
-
STL
9h 01m
1 stop
Multiple Airlines Logo
2:51 pm - 10:37 am
STL
-
SNA
21h 46m
1 stop
$159Multiple Airlines
Sat, Feb 14 - Sat, Feb 21
Multiple Airlines Logo
6:45 am - 9:26 pm
SNA
-
STL
12h 41m
1 stop
Multiple Airlines Logo
10:11 pm - 3:42 pm
STL
-
SNA
19h 31m
1 stop
$165Multiple Airlines
Fri, Feb 13 - Mon, Feb 16
Southwest Logo
1:20 pm - 9:55 pm
SJC
-
STL
6h 35m
1 stop
Southwest Logo
9:35 am - 2:15 pm
STL
-
SJC
6h 40m
1 stop
$257Southwest
Tue, Feb 17 - Wed, Feb 18
Alaska Airlines Logo
9:00 am - 1:54 pm
SMF
-
STL
26h 54m
1 stop
Alaska Airlines Logo
2:50 pm - 8:03 pm
STL
-
SMF
7h 13m
1 stop
$257Alaska Airlines
Tue, Feb 3 - Tue, Feb 10
Southwest Logo
12:35 pm - 10:55 pm
SJC
-
STL
8h 20m
1 stop
Southwest Logo
2:20 pm - 9:55 pm
STL
-
SJC
9h 35m
2 stops
$262Southwest
Tue, Feb 17 - Wed, Feb 18
Delta Logo
6:25 pm - 9:32 am
SMF
-
STL
13h 07m
2 stops
Delta Logo
7:00 am - 5:28 pm
STL
-
SMF
12h 28m
2 stops
$274Delta
Mon, Feb 23 - Fri, Feb 27
Alaska Airlines Logo
6:15 am - 1:51 pm
OAK
-
STL
29h 36m
1 stop
Alaska Airlines Logo
7:00 am - 4:37 pm
STL
-
OAK
11h 37m
1 stop
$280Alaska Airlines
Fri, Mar 6 - Tue, Mar 10

Frontier flights from California to St. Louis

Our best Frontier deals on California to St. Louis flight tickets
Frontier
Feb 12
LAS4:10 pmLas Vegas Harry Reid Intl
3h 16m
STL9:26 pmLambert-St Louis
Feb 14
STL6:41 pmLambert-St Louis
3h 50m
LAS8:31 pmLas Vegas Harry Reid Intl
$67
Frontier
Feb 20
LAS4:10 pmLas Vegas Harry Reid Intl
3h 16m
STL9:26 pmLambert-St Louis
Feb 23
STL10:11 pmLambert-St Louis
3h 48m
LAS11:59 pmLas Vegas Harry Reid Intl
$68
Frontier
Feb 13
LAS4:10 pmLas Vegas Harry Reid Intl
3h 16m
STL9:26 pmLambert-St Louis
Feb 20
STL10:11 pmLambert-St Louis
3h 48m
LAS11:59 pmLas Vegas Harry Reid Intl
$88

Southwest flights from California to St. Louis

Our best Southwest deals on California to St. Louis flight tickets
Southwest
Feb 17
SJC1:20 pmSan Jose
6h 35m
1 stop
STL9:55 pmLambert-St Louis
Feb 18
STL9:35 amLambert-St Louis
6h 40m
1 stop
SJC2:15 pmSan Jose
$257
Southwest
Feb 17
SJC12:35 pmSan Jose
8h 20m
1 stop
STL10:55 pmLambert-St Louis
Feb 18
STL2:20 pmLambert-St Louis
9h 35m
2 stops
SJC9:55 pmSan Jose
$262
Southwest
Apr 14
SAN12:15 pmSan Diego
7h 30m
2 stops
STL9:45 pmLambert-St Louis
Apr 28
STL5:30 amLambert-St Louis
5h 25m
1 stop
SAN8:55 amSan Diego
$290

momondo Fare Finder

 
Customize your flight search to find flights from California 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 January 16, 2026.
Use the filters below to find and compare flights from California to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 2/12

4:10 pm-9:26 pm

Nonstop3h 16m

Lambert-St Louis

Sat 2/14

6:41 pm-8:31 pm

Nonstop3h 50m

$67

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 2/20

4:10 pm-9:26 pm

Nonstop3h 16m

Lambert-St Louis

Mon 2/23

10:11 pm-11:59 pm

Nonstop3h 48m

$68

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 2/13

4:10 pm-9:26 pm

Nonstop3h 16m

Lambert-St Louis

Fri 2/20

10:11 pm-11:59 pm

Nonstop3h 48m

$88

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Sat 2/14

6:45 am-5:46 pm

1 stop9h 01m

Lambert-St Louis

Sat 2/21

2:51 pm-10:37 am

1 stop21h 46m

$159

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 2/13

6:45 am-9:26 pm

1 stop12h 41m

Lambert-St Louis

Mon 2/16

10:11 pm-3:42 pm

1 stop19h 31m

$165

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Tue 2/17

1:20 pm-9:55 pm

1 stop6h 35m

Lambert-St Louis

Wed 2/18

9:35 am-2:15 pm

1 stop6h 40m

$257

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Tue 2/3

9:00 am-1:54 pm

1 stop26h 54m

Lambert-St Louis

Tue 2/10

2:50 pm-8:03 pm

1 stop7h 13m

$257

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Tue 2/17

12:35 pm-10:55 pm

1 stop8h 20m

Lambert-St Louis

Wed 2/18

2:20 pm-9:55 pm

2 stops9h 35m

$262

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Mon 2/23

6:25 pm-9:32 am

2 stops13h 07m

Lambert-St Louis

Fri 2/27

7:00 am-5:28 pm

2 stops12h 28m

$274

OaklandSt. Louis

OAK - STL

OAKSTL

Oakland

Fri 3/6

6:15 am-1:51 pm

1 stop29h 36m

Lambert-St Louis

Tue 3/10

7:00 am-4:37 pm

1 stop11h 37m

$280

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 California 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, October is the cheapest month to fly from California to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $336. The month of February is another great option to travel to St. Louis, with average flight prices from California averaging around $357.

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 $389. 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 $428. 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 California in the evening is the least expensive time of day to depart. momondo users have found prices as low as $351 when looking at flights departing in the evening. In the afternoon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $409 per ticket.

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

Fly from San Francisco to Lambert-St Louis for the best California - 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 California when booking weeks ahead of your departure date. In general, you can expect to find flights to St. Louis for around $387 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to St. Louis from California for as low as $298 on momondo.

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

There are 4 cabin classes available to choose from on California 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 California to St. Louis flights?

You could potentially save up to 39% on your flight if you consider stops on a California to St. Louis flight.

Cheap California to St. Louis flight deals and tips

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

Best Price Found

$192

Fastest flight time

3h 05m

Direct flights

Every day

Airports in St. Louis

1 airport
The best one-way flight to St. Louis from California in the past 72 hours is $192. The best round-trip flight deal from California to St. Louis found on momondo in the last 72 hours is $355.
The fastest flight from California to St. Louis takes 3h 05m
Direct flights go from California to St. Louis every day.
There is 1 airport in St. Louis. From California there are direct flights to Lambert-St Louis (STL).
Search flight deals

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

    Prices for flights from California to Lambert-St Louis Airport are refreshed on a daily basis.

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

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

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from California to Lambert-St Louis Airport.

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

    The required travel and health documents for your Lambert-St Louis Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Lambert-St Louis Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

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

Best airlines flying from California to St. Louis

Compare and see reviews for airlines that fly from California to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $117Free CancellationRating
5.7
3,057 reviews
Search Frontier flights
DeltaPriceFrom $136Free CancellationRating
7.9
8,048 reviews
Search Delta flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
11,132 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,163 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,720 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $282Free CancellationRating
8.0
4,258 reviews
Search Southwest flights

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
Florissant
Maryland Heights
O'Fallon
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Eureka
Edwardsville
Festus
Glencoe
Litchfield
Shrewsbury

Why use momondo?

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

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

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

Flights from California 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 California to St. Louis?

Once all potential California 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 California to St. Louis right now. Can momondo alert me if prices change?

If you are simply researching potential flights to St. Louis, momondo offers a useful price alert feature which will track prices for flights to St. Louis from California and alert you when they change.

An easier way to manage your St. Louis trip

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