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Cheap flights from California to St. Louis from $39

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 1/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
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
7:00 am - 12:12 pm
LAS
-
STL
3h 12mnonstop
Frontier Logo
1:07 pm - 2:53 pm
STL
-
LAS
3h 46mnonstop
$79Frontier
Fri, Jan 9 - Mon, Jan 12
Frontier Logo
3:32 pm - 8:48 pm
LAS
-
STL
3h 16mnonstop
Frontier Logo
9:45 pm - 11:44 pm
STL
-
LAS
3h 59mnonstop
$80Frontier
Fri, Feb 6 - Mon, Feb 9
Multiple Airlines Logo
4:37 pm - 12:40 pm
SNA
-
STL
18h 03m1 stop
Multiple Airlines Logo
3:46 pm - 10:58 am
STL
-
SNA
21h 12m1 stop
$153Multiple Airlines
Wed, Jan 14 - Wed, Jan 21
Multiple Airlines Logo
6:45 am - 8:48 pm
SNA
-
STL
12h 03m1 stop
Multiple Airlines Logo
9:32 pm - 8:57 pm
STL
-
SNA
25h 25m1 stop
$154Multiple Airlines
Fri, Feb 6 - Sun, Feb 8
Delta Logo
7:45 am - 9:38 pm
SJC
-
STL
11h 53m2 stops
Delta Logo
6:40 am - 8:05 pm
STL
-
SJC
15h 25m2 stops
$274Delta
Mon, Jan 26 - Sat, Jan 31
Delta Logo
7:45 am - 9:38 pm
SJC
-
STL
11h 53m2 stops
Delta Logo
6:35 am - 5:40 pm
STL
-
SJC
13h 05m2 stops
$295Delta
Sat, Jan 31 - Sat, Feb 7
Alaska Airlines Logo
9:05 am - 1:54 pm
SJC
-
STL
26h 49m1 stop
Alaska Airlines Logo
6:19 pm - 9:48 am
STL
-
SJC
17h 29m1 stop
$302Alaska Airlines
Mon, Jan 12 - Sat, Jan 17
Southwest Logo
11:05 am - 7:15 pm
LGB
-
STL
6h 10m1 stop
Southwest Logo
8:15 am - 3:20 pm
STL
-
LGB
9h 05m1 stop
$313Southwest
Tue, Jan 20 - Tue, Jan 27
Southwest Logo
6:55 am - 5:10 pm
LGB
-
STL
8h 15m2 stops
Southwest Logo
10:25 am - 5:40 pm
STL
-
LGB
9h 15m1 stop
$318Southwest
Tue, Jan 20 - Tue, Jan 27
Alaska Airlines Logo
3:07 pm - 1:51 pm
BUR
-
STL
20h 44m2 stops
Alaska Airlines Logo
7:00 am - 1:32 pm
STL
-
BUR
8h 32m1 stop
$367Alaska Airlines
Thu, Feb 19 - Sun, Feb 22

Frontier flights from California to St. Louis

Our best Frontier deals on California to St. Louis flight tickets
Frontier
Jan 9
LAS7:00 amLas Vegas Harry Reid Intl
3h 12m
STL12:12 pmLambert-St Louis
Jan 12
STL1:07 pmLambert-St Louis
3h 46m
LAS2:53 pmLas Vegas Harry Reid Intl
$79
Find similar
Frontier
Feb 6
LAS3:32 pmLas Vegas Harry Reid Intl
3h 16m
STL8:48 pmLambert-St Louis
Feb 9
STL9:45 pmLambert-St Louis
3h 59m
LAS11:44 pmLas Vegas Harry Reid Intl
$80
Find similar
Frontier
Jan 12
LAS7:00 amLas Vegas Harry Reid Intl
3h 12m
STL12:12 pmLambert-St Louis
Jan 19
STL1:35 pmLambert-St Louis
3h 55m
LAS3:30 pmLas Vegas Harry Reid Intl
$88
Find similar

Delta flights from California to St. Louis

Our best Delta deals on California to St. Louis flight tickets
Delta
Jan 26
SJC7:45 amSan Jose
11h 53m
2 stops
STL9:38 pmLambert-St Louis
Jan 31
STL6:40 amLambert-St Louis
15h 25m
2 stops
SJC8:05 pmSan Jose
$274
Find similar
Delta
Jan 6
SAN7:00 amSan Diego
12h 35m
2 stops
STL9:35 pmLambert-St Louis
Jan 13
STL7:00 amLambert-St Louis
11h 40m
2 stops
SAN4:40 pmSan Diego
$276
Find similar
Delta
Dec 29
SMF1:24 pmSacramento Intl
6h 52m
1 stop
STL10:16 pmLambert-St Louis
Jan 6
STL7:00 amLambert-St Louis
12h 30m
2 stops
SMF5:30 pmSacramento Intl
$325
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 18, 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

Fri 1/9

7:00 am-12:12 pm

Nonstop3h 12m

Lambert-St Louis

Mon 1/12

1:07 pm-2:53 pm

Nonstop3h 46m

$79

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

Mon 2/9

9:45 pm-11:44 pm

Nonstop3h 59m

$80

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Wed 1/14

4:37 pm-12:40 pm

1 stop18h 03m

Lambert-St Louis

Wed 1/21

3:46 pm-10:58 am

1 stop21h 12m

$153

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Fri 2/6

6:45 am-8:48 pm

1 stop12h 03m

Lambert-St Louis

Sun 2/8

9:32 pm-8:57 pm

1 stop25h 25m

$154

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Mon 1/26

7:45 am-9:38 pm

2 stops11h 53m

Lambert-St Louis

Sat 1/31

6:40 am-8:05 pm

2 stops15h 25m

$274

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Sat 1/31

7:45 am-9:38 pm

2 stops11h 53m

Lambert-St Louis

Sat 2/7

6:35 am-5:40 pm

2 stops13h 05m

$295

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Mon 1/12

9:05 am-1:54 pm

1 stop26h 49m

Lambert-St Louis

Sat 1/17

6:19 pm-9:48 am

1 stop17h 29m

$302

Long BeachSt. Louis

LGB - STL

LGBSTL

Long Beach Municipal

Tue 1/20

11:05 am-7:15 pm

1 stop6h 10m

Lambert-St Louis

Tue 1/27

8:15 am-3:20 pm

1 stop9h 05m

$313

Long BeachSt. Louis

LGB - STL

LGBSTL

Long Beach Municipal

Tue 1/20

6:55 am-5:10 pm

2 stops8h 15m

Lambert-St Louis

Tue 1/27

10:25 am-5:40 pm

1 stop9h 15m

$318

BurbankSt. Louis

BUR - STL

BURSTL

Burbank Bob Hope

Thu 2/19

3:07 pm-1:51 pm

2 stops20h 44m

Lambert-St Louis

Sun 2/22

7:00 am-1:32 pm

1 stop8h 32m

$367

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 $359.

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 $356 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 $417 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 $391 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 $303 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 35% 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

$152

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 $152. The best round-trip flight deal from California to St. Louis found on momondo in the last 72 hours is $356.
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 $128Free CancellationRating
5.8
3,081 reviews
Search Frontier flights
DeltaPriceFrom $184Free CancellationRating
7.9
8,005 reviews
Search Delta flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
11,055 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $245Free CancellationRating
8.0
11,477 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
9,091 reviews
Search United Airlines flights
SouthwestPriceFrom $283Free CancellationRating
7.9
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
Maryland Heights
O'Fallon
Florissant
Fenton
Wentzville
St. Peters
Collinsville
Alton
Clayton
Festus
Glencoe
Farmington
Eureka
Edwardsville
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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