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Cheap flights from California to St. Louis from $61

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 12/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:47 pm - 10:14 amSAN-STL
15h 27m1 stop
Frontier Logo
7:43 pm - 7:15 pmSTL-SAN
25h 32m1 stop
$124Frontier
Find Deal
Fri, Dec 5 - Sat, Dec 6
Frontier Logo
12:59 am - 9:07 amLAS-STL
6h 08m1 stop
Frontier Logo
7:45 pm - 11:29 pmSTL-LAS
5h 44m1 stop
$129Frontier
Find Deal
Mon, Nov 10 - Sat, Nov 15
Multiple Airlines Logo
9:07 pm - 4:49 pmLAX-STL
17h 42m1 stop
Multiple Airlines Logo
5:44 pm - 8:17 amSTL-LAX
16h 33m1 stop
$169Multiple Airlines
Find Deal
Thu, Jan 22 - Mon, Jan 26
Multiple Airlines Logo
6:10 am - 9:07 amLAX-STL
24h 57m2 stops
Multiple Airlines Logo
7:45 pm - 12:25 amSTL-LAX
6h 40m1 stop
$172Multiple Airlines
Find Deal
Tue, Nov 11 - Sat, Nov 15
United Airlines Logo
12:59 am - 10:04 amLAS-STL
7h 05m1 stop
United Airlines Logo
5:30 pm - 10:26 pmSTL-LAS
6h 56m1 stop
$235United Airlines
Find Deal
Wed, Dec 3 - Sun, Dec 7
Delta Logo
6:05 am - 11:25 pmSFO-STL
15h 20m2 stops
Delta Logo
7:00 am - 3:58 pmSTL-SFO
10h 58m2 stops
$274Delta
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Tue, Jan 20 - Fri, Jan 23
Delta Logo
10:30 am - 11:29 pmSFO-STL
10h 59m2 stops
Delta Logo
6:30 am - 3:57 pmSTL-SFO
11h 27m2 stops
$284Delta
Find Deal
Thu, Dec 4 - Mon, Dec 8
Alaska Airlines Logo
6:30 am - 11:56 pmOAK-STL
15h 26m1 stop
Alaska Airlines Logo
2:55 pm - 11:38 pmSTL-OAK
10h 43m1 stop
$322Alaska Airlines
Find Deal
Tue, Mar 3 - Wed, Mar 4
United Airlines Logo
6:20 am - 4:27 pmSMF-STL
8h 07m1 stop
United Airlines Logo
1:35 pm - 5:46 pmSTL-SMF
6h 11m1 stop
$327United Airlines
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Thu, Nov 27 - Thu, Dec 4
Alaska Airlines Logo
8:10 am - 1:54 pmOAK-STL
27h 44m1 stop
Alaska Airlines Logo
2:50 pm - 4:23 pmSTL-OAK
27h 33m1 stop
$332Alaska Airlines
Find Deal
Tue, Jan 20 - Mon, Jan 26

United Airlines flights from California to St. Louis

Our best United Airlines deals on California to St. Louis flight tickets
United Airlines
Dec 3
LAS12:59 amLas Vegas Harry Reid Intl
7h 05m
1 stop
STL10:04 amLambert-St Louis
Dec 7
STL5:30 pmLambert-St Louis
6h 56m
1 stop
LAS10:26 pmLas Vegas Harry Reid Intl
$235
Find similar
United Airlines
Nov 27
SMF6:20 amSacramento Intl
8h 07m
1 stop
STL4:27 pmLambert-St Louis
Dec 4
STL1:35 pmLambert-St Louis
6h 11m
1 stop
SMF5:46 pmSacramento Intl
$327
Find similar
United Airlines
Nov 4
LAX12:55 amLos Angeles
7h 44m
1 stop
STL10:39 amLambert-St Louis
Nov 8
STL1:35 pmLambert-St Louis
6h 06m
1 stop
LAX5:41 pmLos Angeles
$375
Find similar

Frontier flights from California to St. Louis

Our best Frontier deals on California to St. Louis flight tickets
Frontier
Dec 5
SAN4:47 pmSan Diego
15h 27m
1 stop
STL10:14 amLambert-St Louis
Dec 6
STL7:43 pmLambert-St Louis
25h 32m
1 stop
SAN7:15 pmSan Diego
$124
Find similar
Frontier
Nov 10
LAS12:59 amLas Vegas Harry Reid Intl
6h 08m
1 stop
STL9:07 amLambert-St Louis
Nov 15
STL7:45 pmLambert-St Louis
5h 44m
1 stop
LAS11:29 pmLas Vegas Harry Reid Intl
$129
Find similar
Frontier
Nov 17
SJC12:27 pmSan Jose
18h 40m
1 stop
STL9:07 amLambert-St Louis
Nov 20
STL9:54 pmLambert-St Louis
21h 40m
1 stop
SJC5:34 pmSan Jose
$130
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 October 28, 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

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Fri 12/5

4:47 pm-10:14 am

1 stop15h 27m

Lambert-St Louis

Sat 12/6

7:43 pm-7:15 pm

1 stop25h 32m

$124

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 11/10

12:59 am-9:07 am

1 stop6h 08m

Lambert-St Louis

Sat 11/15

7:45 pm-11:29 pm

1 stop5h 44m

$129

Los AngelesSt. Louis

LAX - STL

LAXSTL

Los Angeles

Thu 1/22

9:07 pm-4:49 pm

1 stop17h 42m

Lambert-St Louis

Mon 1/26

5:44 pm-8:17 am

1 stop16h 33m

$169

Los AngelesSt. Louis

LAX - STL

LAXSTL

Los Angeles

Tue 11/11

6:10 am-9:07 am

2 stops24h 57m

Lambert-St Louis

Sat 11/15

7:45 pm-12:25 am

1 stop6h 40m

$172

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 12/3

12:59 am-10:04 am

1 stop7h 05m

Lambert-St Louis

Sun 12/7

5:30 pm-10:26 pm

1 stop6h 56m

$235

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 1/20

6:05 am-11:25 pm

2 stops15h 20m

Lambert-St Louis

Fri 1/23

7:00 am-3:58 pm

2 stops10h 58m

$274

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Thu 12/4

10:30 am-11:29 pm

2 stops10h 59m

Lambert-St Louis

Mon 12/8

6:30 am-3:57 pm

2 stops11h 27m

$284

OaklandSt. Louis

OAK - STL

OAKSTL

Oakland

Tue 3/3

6:30 am-11:56 pm

1 stop15h 26m

Lambert-St Louis

Wed 3/4

2:55 pm-11:38 pm

1 stop10h 43m

$322

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Thu 11/27

6:20 am-4:27 pm

1 stop8h 07m

Lambert-St Louis

Thu 12/4

1:35 pm-5:46 pm

1 stop6h 11m

$327

OaklandSt. Louis

OAK - STL

OAKSTL

Oakland

Tue 1/20

8:10 am-1:54 pm

1 stop27h 44m

Lambert-St Louis

Mon 1/26

2:50 pm-4:23 pm

1 stop27h 33m

$332

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, April 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 $359. The month of September is another great option to travel to St. Louis, with average flight prices from California averaging around $366.

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 $393. 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 Saturday because tickets tend to average around $432. 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 $378 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 $427 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 $401 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 $316 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 34% 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

$161

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 $161. The best round-trip flight deal from California to St. Louis found on momondo in the last 72 hours is $318.
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 $124Free CancellationRating
5.8
3,122 reviews
Search Frontier flights
DeltaPriceFrom $173Free CancellationRating
7.9
7,995 reviews
Search Delta flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
11,034 reviews
Search American Airlines flights
Alaska AirlinesPriceFrom $245Free CancellationRating
8.0
11,199 reviews
Search Alaska Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
8,996 reviews
Search United Airlines flights
SouthwestPriceFrom $283Free CancellationRating
8.0
4,235 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
Wentzville
Fenton
Collinsville
St. Peters
Alton
Farmington
Festus
Glencoe
Edwardsville
Clayton
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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