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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 1/29. 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
3:32 pm - 8:48 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
9:32 pm - 11:29 pm
STL
-
LAS
3h 57mnonstop
$67Frontier
Fri, Feb 6 - Sun, Feb 8
Frontier Logo
3:50 pm - 9:06 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
9:32 pm - 11:29 pm
STL
-
LAS
3h 57mnonstop
$68Frontier
Thu, Jan 29 - Sun, Feb 1
Frontier Logo
4:10 pm - 9:26 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
10:11 pm - 11:59 pm
STL
-
LAS
3h 48mnonstop
$87Frontier
Fri, Feb 20 - Mon, Feb 23
Multiple Airlines Logo
6:45 am - 9:06 pm
SNA
-
STL
12h 21m1 stop
Multiple Airlines Logo
3:46 pm - 11:32 am
STL
-
SNA
21h 46m1 stop
$148Multiple Airlines
Thu, Feb 5 - Sat, Feb 7
Multiple Airlines Logo
4:37 pm - 9:06 pm
SNA
-
STL
26h 29m1 stop
Multiple Airlines Logo
9:45 pm - 12:25 pm
STL
-
SNA
16h 40m1 stop
$150Multiple Airlines
Wed, Feb 4 - Mon, Feb 9
Alaska Airlines Logo
6:15 am - 1:51 pm
OAK
-
STL
29h 36m1 stop
Alaska Airlines Logo
7:00 am - 4:37 pm
STL
-
OAK
11h 37m1 stop
$213Alaska Airlines
Tue, Feb 17 - Tue, Feb 24
Alaska Airlines Logo
6:15 am - 1:51 pm
OAK
-
STL
29h 36m1 stop
Alaska Airlines Logo
2:47 pm - 4:37 pm
STL
-
OAK
27h 50m1 stop
$220Alaska Airlines
Tue, Feb 17 - Mon, Feb 23
Southwest Logo
5:15 am - 2:50 pm
SMF
-
STL
7h 35m1 stop
Southwest Logo
7:10 am - 1:15 pm
STL
-
SMF
8h 05m2 stops
$248Southwest
Tue, Apr 21 - Tue, Apr 28
Delta Logo
7:15 am - 12:25 am
SJC
-
STL
15h 10m2 stops
Delta Logo
2:22 pm - 10:05 pm
STL
-
SJC
9h 43m2 stops
$254Delta
Tue, Feb 17 - Tue, Feb 24
Delta Logo
11:45 am - 11:23 pm
SMF
-
STL
9h 38m2 stops
Delta Logo
2:22 pm - 9:49 pm
STL
-
SMF
9h 27m2 stops
$254Delta
Thu, Feb 26 - Mon, Mar 2

Frontier flights from California to St. Louis

Our best Frontier deals on California to St. Louis flight tickets
Frontier
Feb 6
LAS3:32 pmLas Vegas Harry Reid Intl
3h 16m
STL8:48 pmLambert-St Louis
Feb 8
STL9:32 pmLambert-St Louis
3h 57m
LAS11:29 pmLas Vegas Harry Reid Intl
$67
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 57m
LAS11:29 pmLas Vegas Harry Reid Intl
$68
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
$87

Southwest flights from California to St. Louis

Our best Southwest deals on California to St. Louis flight tickets
Southwest
Apr 21
SMF5:15 amSacramento Intl
7h 35m
1 stop
STL2:50 pmLambert-St Louis
Apr 28
STL7:10 amLambert-St Louis
8h 05m
2 stops
SMF1:15 pmSacramento Intl
$248
Southwest
Feb 3
SNA12:35 pmSanta Ana J. Wayne/Orange Cnty
7h 45m
2 stops
STL10:20 pmLambert-St Louis
Feb 9
STL2:25 pmLambert-St Louis
8h 10m
2 stops
SNA8:35 pmSanta Ana J. Wayne/Orange Cnty
$286
Southwest
Jan 12
SMF6:25 amSacramento Intl
6h 35m
1 stop
STL3:00 pmLambert-St Louis
Jun 23
STL8:30 amLambert-St Louis
7h 55m
1 stop
SMF2:25 pmSacramento Intl
$393

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 8, 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 2/6

3:32 pm-8:48 pm

Nonstop3h 16m

Lambert-St Louis

Sun 2/8

9:32 pm-11:29 pm

Nonstop3h 57m

$67

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-11:29 pm

Nonstop3h 57m

$68

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

$87

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Thu 2/5

6:45 am-9:06 pm

1 stop12h 21m

Lambert-St Louis

Sat 2/7

3:46 pm-11:32 am

1 stop21h 46m

$148

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Wed 2/4

4:37 pm-9:06 pm

1 stop26h 29m

Lambert-St Louis

Mon 2/9

9:45 pm-12:25 pm

1 stop16h 40m

$150

OaklandSt. Louis

OAK - STL

OAKSTL

Oakland

Tue 2/17

6:15 am-1:51 pm

1 stop29h 36m

Lambert-St Louis

Tue 2/24

7:00 am-4:37 pm

1 stop11h 37m

$213

OaklandSt. Louis

OAK - STL

OAKSTL

Oakland

Tue 2/17

6:15 am-1:51 pm

1 stop29h 36m

Lambert-St Louis

Mon 2/23

2:47 pm-4:37 pm

1 stop27h 50m

$220

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Tue 4/21

5:15 am-2:50 pm

1 stop7h 35m

Lambert-St Louis

Tue 4/28

7:10 am-1:15 pm

2 stops8h 05m

$248

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Tue 2/17

7:15 am-12:25 am

2 stops15h 10m

Lambert-St Louis

Tue 2/24

2:22 pm-10:05 pm

2 stops9h 43m

$254

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Thu 2/26

11:45 am-11:23 pm

2 stops9h 38m

Lambert-St Louis

Mon 3/2

2:22 pm-9:49 pm

2 stops9h 27m

$254

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 Thursday when prices can be found for as low as $390. 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 $426. 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

$189

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 $189. The best round-trip flight deal from California to St. Louis found on momondo in the last 72 hours is $372.
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 $130Free CancellationRating
5.7
3,061 reviews
Search Frontier flights
DeltaPriceFrom $184Free CancellationRating
7.9
8,025 reviews
Search Delta flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
11,097 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,139 reviews
Search United Airlines flights
Alaska AirlinesPriceFrom $257Free CancellationRating
8.0
11,661 reviews
Search Alaska Airlines flights
SouthwestPriceFrom $282Free CancellationRating
8.0
4,250 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
O'Fallon
Maryland Heights
Florissant
Fenton
Collinsville
St. Peters
Wentzville
Alton
Farmington
Clayton
Eureka
Festus
Edwardsville
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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