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Cheap flights from California to St. Louis from $52

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 2/10. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
7:00 am - 12:12 pmLAS-STL
3h 12mnonstop
Frontier Logo
1:16 pm - 3:02 pmSTL-LAS
3h 46mnonstop
$87Frontier
Find Deal
Thu, Dec 11 - Sun, Dec 14
Frontier Logo
3:50 pm - 9:06 pmLAS-STL
3h 16mnonstop
Frontier Logo
9:32 pm - 11:31 pmSTL-LAS
3h 59mnonstop
$106Frontier
Find Deal
Thu, Jan 29 - Sun, Feb 1
American Airlines Logo
6:00 am - 10:55 pmONT-STL
14h 55m1 stop
American Airlines Logo
7:15 am - 10:48 pmSTL-ONT
17h 33m1 stop
$175American Airlines
Find Deal
Wed, Jan 14 - Wed, Jan 21
Multiple Airlines Logo
7:45 am - 4:49 pmSNA-STL
7h 04m1 stop
Multiple Airlines Logo
7:43 pm - 11:17 amSTL-SNA
17h 34m1 stop
$194Multiple Airlines
Find Deal
Wed, Feb 18 - Fri, Feb 20
Multiple Airlines Logo
5:40 pm - 2:46 pmBUR-STL
19h 06m2 stops
Multiple Airlines Logo
9:32 pm - 8:13 amSTL-BUR
12h 41m1 stop
$203Multiple Airlines
Find Deal
Fri, Jan 30 - Sun, Feb 1
American Airlines Logo
6:21 pm - 11:59 pmLAX-STL
3h 38mnonstop
American Airlines Logo
10:04 am - 7:02 pmSTL-LAX
10h 58m1 stop
$204American Airlines
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Tue, Feb 10 - Sun, Feb 15
Southwest Logo
5:10 am - 2:25 pmSMF-STL
7h 15m1 stop
Southwest Logo
11:30 am - 6:45 pmSTL-SMF
9h 15m1 stop
$216Southwest
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Tue, Jan 27 - Thu, Jan 29
Alaska Airlines Logo
11:58 am - 1:54 pmBUR-STL
23h 56m1 stop
Alaska Airlines Logo
6:19 pm - 1:00 pmSTL-BUR
20h 41m1 stop
$240Alaska Airlines
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Wed, Jan 21 - Sat, Jan 24
Alaska Airlines Logo
1:17 pm - 11:59 pmSMF-STL
8h 42m1 stop
Alaska Airlines Logo
2:47 pm - 9:14 pmSTL-SMF
8h 27m1 stop
$242Alaska Airlines
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Thu, Feb 26 - Mon, Mar 2
Southwest Logo
2:50 pm - 10:20 pmOAK-STL
5h 30m1 stop
Southwest Logo
8:20 am - 2:05 pmSTL-OAK
7h 45m1 stop
$250Southwest
Find Deal
Tue, Jan 6 - Wed, Jan 7

Southwest flights from California to St. Louis

Our best Southwest deals on California to St. Louis flight tickets
Southwest
Jan 6
ONT3:25 pmOntario
4h 55m
1 stop
STL10:20 pmLambert-St Louis
Jan 13
STL2:20 pmLambert-St Louis
6h 20m
1 stop
ONT6:40 pmOntario
$206
Find similar
Southwest
Jan 27
SMF5:10 amSacramento Intl
7h 15m
1 stop
STL2:25 pmLambert-St Louis
Jan 29
STL11:30 amLambert-St Louis
9h 15m
1 stop
SMF6:45 pmSacramento Intl
$216
Find similar
Southwest
Feb 17
LAX11:15 pmLos Angeles
6h 20m
1 stop
STL7:35 amLambert-St Louis
Feb 20
STL7:00 pmLambert-St Louis
4h 15m
LAX9:15 pmLos Angeles
$226
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Frontier flights from California to St. Louis

Our best Frontier deals on California to St. Louis flight tickets
Frontier
Dec 11
LAS7:00 amLas Vegas Harry Reid Intl
3h 12m
STL12:12 pmLambert-St Louis
Dec 14
STL1:16 pmLambert-St Louis
3h 46m
LAS3:02 pmLas Vegas Harry Reid Intl
$87
Find similar
Frontier
Jan 29
LAS3:50 pmLas Vegas Harry Reid Intl
3h 16m
STL9:06 pmLambert-St Louis
Feb 1
STL9:32 pmLambert-St Louis
3h 59m
LAS11:31 pmLas Vegas Harry Reid Intl
$106
Find similar
Frontier
Jan 23
LAS3:32 pmLas Vegas Harry Reid Intl
3h 16m
STL8:48 pmLambert-St Louis
Jan 26
STL9:45 pmLambert-St Louis
3h 59m
LAS11:44 pmLas Vegas Harry Reid Intl
$108
Find similar

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 December 3, 2025.
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 12/11

7:00 am-12:12 pm

Nonstop3h 12m

Lambert-St Louis

Sun 12/14

1:16 pm-3:02 pm

Nonstop3h 46m

$87

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 1/29

3:50 pm-9:06 pm

Nonstop3h 16m

Lambert-St Louis

Sun 2/1

9:32 pm-11:31 pm

Nonstop3h 59m

$106

OntarioSt. Louis

ONT - STL

ONTSTL

Ontario

Wed 1/14

6:00 am-10:55 pm

1 stop14h 55m

Lambert-St Louis

Wed 1/21

7:15 am-10:48 pm

1 stop17h 33m

$175

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Wed 2/18

7:45 am-4:49 pm

1 stop7h 04m

Lambert-St Louis

Fri 2/20

7:43 pm-11:17 am

1 stop17h 34m

$194

BurbankSt. Louis

BUR - STL

BURSTL

Burbank Bob Hope

Fri 1/30

5:40 pm-2:46 pm

2 stops19h 06m

Lambert-St Louis

Sun 2/1

9:32 pm-8:13 am

1 stop12h 41m

$203

Los AngelesSt. Louis

LAX - STL

LAXSTL

Los Angeles

Tue 2/10

6:21 pm-11:59 pm

Nonstop3h 38m

Lambert-St Louis

Sun 2/15

10:04 am-7:02 pm

1 stop10h 58m

$204

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Tue 1/27

5:10 am-2:25 pm

1 stop7h 15m

Lambert-St Louis

Thu 1/29

11:30 am-6:45 pm

1 stop9h 15m

$216

BurbankSt. Louis

BUR - STL

BURSTL

Burbank Bob Hope

Wed 1/21

11:58 am-1:54 pm

1 stop23h 56m

Lambert-St Louis

Sat 1/24

6:19 pm-1:00 pm

1 stop20h 41m

$240

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Thu 2/26

1:17 pm-11:59 pm

1 stop8h 42m

Lambert-St Louis

Mon 3/2

2:47 pm-9:14 pm

1 stop8h 27m

$242

OaklandSt. Louis

OAK - STL

OAKSTL

Oakland

Tue 1/6

2:50 pm-10:20 pm

1 stop5h 30m

Lambert-St Louis

Wed 1/7

8:20 am-2:05 pm

1 stop7h 45m

$250

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 April is another great option to travel to St. Louis, with average flight prices from California averaging around $360.

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 $388. 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 $431. 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 $361 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 $421 per ticket.

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

Fly from Sacramento Intl 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 $398 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 $310 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 23% 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

$154

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 $154. The best round-trip flight deal from California to St. Louis found on momondo in the last 72 hours is $362.
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 near St. Louis: 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
5.8
3,094 reviews
Search Frontier flights
DeltaPriceFrom $184Free CancellationRating
7.9
8,011 reviews
Search Delta flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
11,044 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $245Free CancellationRating
8.0
11,385 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,063 reviews
Search United Airlines flights
SouthwestPriceFrom $284Free CancellationRating
8.0
4,253 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
Maryland Heights
O'Fallon
Florissant
Fenton
Wentzville
Collinsville
St. Peters
Alton
Farmington
Clayton
Festus
Glencoe
Edwardsville
Eureka
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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