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Cheap flights from California 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 California 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 California to St. Louis

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
6:05 am - 11:19 am
LAS
-
STL
3h 14mnonstop
Frontier Logo
6:19 pm - 8:09 pm
STL
-
LAS
3h 50mnonstop
$107Frontier
Fri, Mar 6 - Sun, Mar 8
Frontier Logo
12:22 pm - 5:46 pm
LAS
-
STL
3h 24mnonstop
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
$116Frontier
Sat, Feb 14 - Mon, Feb 16
Multiple Airlines Logo
4:37 pm - 11:19 am
SNA
-
STL
16h 42m
1 stop
Multiple Airlines Logo
6:19 pm - 12:27 pm
STL
-
SNA
20h 08m
1 stop
$184Multiple Airlines
Thu, Mar 5 - Sun, Mar 8
Multiple Airlines Logo
11:32 am - 9:49 am
SNA
-
STL
20h 17m
1 stop
Multiple Airlines Logo
8:12 pm - 9:53 am
STL
-
SNA
39h 41m
2 stops
$202Multiple Airlines
Fri, Mar 13 - Mon, Mar 23
American Airlines Logo
6:00 am - 5:13 pm
SJC
-
STL
9h 13m
1 stop
American Airlines Logo
5:12 am - 10:16 am
STL
-
SJC
7h 04m
1 stop
$255American Airlines
Wed, Mar 18 - Wed, Mar 25
American Airlines Logo
11:52 pm - 8:55 am
RNO
-
STL
7h 03m
1 stop
American Airlines Logo
11:46 am - 4:45 pm
STL
-
RNO
6h 59m
1 stop
$257American Airlines
Tue, Feb 24 - Sat, Feb 28
Delta Logo
4:50 pm - 12:21 am
SJC
-
STL
5h 31m
1 stop
Delta Logo
6:45 pm - 11:41 pm
STL
-
SJC
6h 56m
1 stop
$257Delta
Tue, Mar 31 - Tue, Apr 14
Southwest Logo
10:55 pm - 9:00 am
SJC
-
STL
8h 05m
1 stop
Southwest Logo
4:05 pm - 11:10 pm
STL
-
SJC
9h 05m
2 stops
$262Southwest
Wed, Mar 18 - Wed, Mar 25
Delta Logo
7:15 am - 12:21 am
SJC
-
STL
15h 06m
2 stops
Delta Logo
7:02 am - 12:23 pm
STL
-
SJC
7h 21m
1 stop
$285Delta
Tue, Mar 31 - Tue, Apr 14
Southwest Logo
7:40 am - 6:45 pm
SJC
-
STL
9h 05m
2 stops
Southwest Logo
4:05 pm - 11:10 pm
STL
-
SJC
9h 05m
2 stops
$326Southwest
Wed, Mar 18 - Wed, Mar 25

American Airlines flights from California to St. Louis

Our best American Airlines deals on California to St. Louis flight tickets
American Airlines
Mar 18
SJC6:00 amSan Jose
9h 13m
1 stop
STL5:13 pmLambert-St Louis
Mar 25
STL5:12 amLambert-St Louis
7h 04m
1 stop
SJC10:16 amSan Jose
$255
American Airlines
Apr 25
ONT11:59 pmOntario
6h 55m
1 stop
STL8:54 amLambert-St Louis
Apr 28
STL2:37 pmLambert-St Louis
5h 47m
1 stop
ONT6:24 pmOntario
$257
American Airlines
Apr 25
ONT11:59 pmOntario
6h 55m
1 stop
STL8:54 amLambert-St Louis
Apr 28
STL8:54 amLambert-St Louis
9h 28m
2 stops
ONT4:22 pmOntario
$262

Frontier flights from California to St. Louis

Our best Frontier deals on California to St. Louis flight tickets
Frontier
Mar 6
LAS6:05 amLas Vegas Harry Reid Intl
3h 14m
STL11:19 amLambert-St Louis
Mar 8
STL6:19 pmLambert-St Louis
3h 50m
LAS8:09 pmLas Vegas Harry Reid Intl
$107
Frontier
Feb 14
LAS12:22 pmLas Vegas Harry Reid Intl
3h 24m
STL5:46 pmLambert-St Louis
Feb 16
STL10:11 pmLambert-St Louis
3h 48m
LAS11:59 pmLas Vegas Harry Reid Intl
$116
Frontier
Feb 13
LAS4:10 pmLas Vegas Harry Reid Intl
3h 16m
STL9:26 pmLambert-St Louis
Feb 16
STL10:11 pmLambert-St Louis
3h 48m
LAS11:59 pmLas Vegas Harry Reid Intl
$117

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 February 3, 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

Fri 3/6

6:05 am-11:19 am

Nonstop3h 14m

Lambert-St Louis

Sun 3/8

6:19 pm-8:09 pm

Nonstop3h 50m

$107

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 2/14

12:22 pm-5:46 pm

Nonstop3h 24m

Lambert-St Louis

Mon 2/16

10:11 pm-11:59 pm

Nonstop3h 48m

$116

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Thu 3/5

4:37 pm-11:19 am

1 stop16h 42m

Lambert-St Louis

Sun 3/8

6:19 pm-12:27 pm

1 stop20h 08m

$184

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 3/13

11:32 am-9:49 am

1 stop20h 17m

Lambert-St Louis

Mon 3/23

8:12 pm-9:53 am

2 stops39h 41m

$202

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Wed 3/18

6:00 am-5:13 pm

1 stop9h 13m

Lambert-St Louis

Wed 3/25

5:12 am-10:16 am

1 stop7h 04m

$255

RenoSt. Louis

RNO - STL

RNOSTL

Reno

Tue 2/24

11:52 pm-8:55 am

1 stop7h 03m

Lambert-St Louis

Sat 2/28

11:46 am-4:45 pm

1 stop6h 59m

$257

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Tue 3/31

4:50 pm-12:21 am

1 stop5h 31m

Lambert-St Louis

Tue 4/14

6:45 pm-11:41 pm

1 stop6h 56m

$257

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Wed 3/18

10:55 pm-9:00 am

1 stop8h 05m

Lambert-St Louis

Wed 3/25

4:05 pm-11:10 pm

2 stops9h 05m

$262

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Tue 3/31

7:15 am-12:21 am

2 stops15h 06m

Lambert-St Louis

Tue 4/14

7:02 am-12:23 pm

1 stop7h 21m

$285

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Wed 3/18

7:40 am-6:45 pm

2 stops9h 05m

Lambert-St Louis

Wed 3/25

4:05 pm-11:10 pm

2 stops9h 05m

$326

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 $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 Thursday 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. At noon is when there is more demand to fly to St. Louis, so prices are often more expensive at around $411 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 $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 California for as low as $312 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?

No. A direct flight is the cheapest option for a flight between California to St. Louis.

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

$183

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 $183. The best round-trip flight deal from California to St. Louis found on momondo in the last 72 hours is $339.
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
3,051 reviews
Search Frontier flights
DeltaPriceFrom $136Free CancellationRating
7.9
8,132 reviews
Search Delta flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
11,212 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,231 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,830 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $283Free CancellationRating
8.0
4,271 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
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 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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