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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 10/11. 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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Find the cheapest flights from California to St. Louis

Cheap round-trip flights

Frontier Logo
8:34 am - 1:53 pmLAS-STL
3h 19mnonstop
Frontier Logo
9:29 pm - 11:05 pmSTL-LAS
3h 36mnonstop
$74Frontier
Find Deal
Mon, Sep 8 - Mon, Sep 15
Frontier Logo
10:30 am - 3:56 pmLAS-STL
3h 26mnonstop
Frontier Logo
7:52 pm - 11:32 pmSTL-LAS
5h 40m1 stop
$120Frontier
Find Deal
Sat, Oct 18 - Tue, Oct 21
Logo
10:16 pm - 9:40 amLAS-STL
9h 24m1 stop
Logo
2:38 pm - 4:16 pmSTL-LAS
3h 38mnonstop
$152
Find Deal
Wed, Oct 1 - Sun, Oct 5
Logo
8:34 am - 1:53 pmLAS-STL
3h 19mnonstop
Logo
3:35 pm - 9:37 pmSTL-LAS
8h 02m1 stop
$185
Find Deal
Fri, Sep 5 - Mon, Sep 8
American Airlines Logo
2:59 pm - 10:50 pmLAS-STL
5h 51m1 stop
American Airlines Logo
6:29 am - 12:27 pmSTL-LAS
7h 58m1 stop
$191American Airlines
Find Deal
Tue, Sep 23 - Tue, Sep 30
American Airlines Logo
6:10 am - 4:56 pmSFO-STL
8h 46m1 stop
American Airlines Logo
3:59 pm - 11:15 pmSTL-SFO
9h 16m1 stop
$193American Airlines
Find Deal
Tue, Sep 2 - Wed, Sep 3
United Airlines Logo
11:59 pm - 9:57 amSFO-STL
7h 58m1 stop
United Airlines Logo
5:49 pm - 8:10 pmSTL-SFO
4h 21mnonstop
$200United Airlines
Find Deal
Tue, Sep 2 - Wed, Sep 3
Alaska Airlines Logo
9:21 pm - 2:39 pmLAS-STL
15h 18m1 stop
Alaska Airlines Logo
6:30 pm - 9:56 amSTL-LAS
17h 26m1 stop
$203Alaska Airlines
Find Deal
Fri, Sep 26 - Fri, Oct 3
Alaska Airlines Logo
6:50 am - 5:34 pmSMF-STL
8h 44m1 stop
Alaska Airlines Logo
6:30 pm - 11:47 pmSTL-SMF
7h 17m1 stop
$211Alaska Airlines
Find Deal
Thu, Sep 25 - Thu, Oct 2
United Airlines Logo
7:00 am - 4:27 pmBUR-STL
7h 27m1 stop
United Airlines Logo
4:43 pm - 8:51 pmSTL-BUR
6h 08m1 stop
$227United Airlines
Find Deal
Wed, Nov 5 - Sat, Nov 8

American Airlines flights from California to St. Louis

Our best American Airlines deals on California to St. Louis flight tickets
American Airlines
Sep 23
LAS2:59 pmLas Vegas Harry Reid Intl
5h 51m
1 stop
STL10:50 pmLambert-St Louis
Sep 30
STL6:29 amLambert-St Louis
7h 58m
1 stop
LAS12:27 pmLas Vegas Harry Reid Intl
$191
Find similar
American Airlines
Sep 2
SFO6:10 amSan Francisco
8h 46m
1 stop
STL4:56 pmLambert-St Louis
Sep 3
STL3:59 pmLambert-St Louis
9h 16m
1 stop
SFO11:15 pmSan Francisco
$193
Find similar
American Airlines
Sep 12
SAN9:45 amSan Diego
6h 15m
1 stop
STL6:00 pmLambert-St Louis
Sep 16
STL8:50 amLambert-St Louis
7h 40m
1 stop
SAN2:30 pmSan Diego
$207
Find similar

United Airlines flights from California to St. Louis

Our best United Airlines deals on California to St. Louis flight tickets
United Airlines
Sep 2
SFO11:59 pmSan Francisco
7h 58m
1 stop
STL9:57 amLambert-St Louis
Sep 3
STL5:49 pmLambert-St Louis
4h 21m
SFO8:10 pmSan Francisco
$200
Find similar
United Airlines
Nov 5
BUR7:00 amBurbank Bob Hope
7h 27m
1 stop
STL4:27 pmLambert-St Louis
Nov 8
STL4:43 pmLambert-St Louis
6h 08m
1 stop
BUR8:51 pmBurbank Bob Hope
$227
Find similar
United Airlines
Nov 5
BUR7:00 amBurbank Bob Hope
7h 27m
1 stop
STL4:27 pmLambert-St Louis
Nov 8
STL9:00 amLambert-St Louis
12h 16m
2 stops
BUR7:16 pmBurbank Bob Hope
$232
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 August 14, 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

Mon 9/8

8:34 am-1:53 pm

Nonstop3h 19m

Lambert-St Louis

Mon 9/15

9:29 pm-11:05 pm

Nonstop3h 36m

$74

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 10/18

10:30 am-3:56 pm

Nonstop3h 26m

Lambert-St Louis

Tue 10/21

7:52 pm-11:32 pm

1 stop5h 40m

$120

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Wed 10/1

10:16 pm-9:40 am

1 stop9h 24m

Lambert-St Louis

Sun 10/5

2:38 pm-4:16 pm

Nonstop3h 38m

$152

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 9/5

8:34 am-1:53 pm

Nonstop3h 19m

Lambert-St Louis

Mon 9/8

3:35 pm-9:37 pm

1 stop8h 02m

$185

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Tue 9/23

2:59 pm-10:50 pm

1 stop5h 51m

Lambert-St Louis

Tue 9/30

6:29 am-12:27 pm

1 stop7h 58m

$191

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 9/2

6:10 am-4:56 pm

1 stop8h 46m

Lambert-St Louis

Wed 9/3

3:59 pm-11:15 pm

1 stop9h 16m

$193

San FranciscoSt. Louis

SFO - STL

SFOSTL

San Francisco

Tue 9/2

11:59 pm-9:57 am

1 stop7h 58m

Lambert-St Louis

Wed 9/3

5:49 pm-8:10 pm

Nonstop4h 21m

$200

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 9/26

9:21 pm-2:39 pm

1 stop15h 18m

Lambert-St Louis

Fri 10/3

6:30 pm-9:56 am

1 stop17h 26m

$203

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Thu 9/25

6:50 am-5:34 pm

1 stop8h 44m

Lambert-St Louis

Thu 10/2

6:30 pm-11:47 pm

1 stop7h 17m

$211

BurbankSt. Louis

BUR - STL

BURSTL

Burbank Bob Hope

Wed 11/5

7:00 am-4:27 pm

1 stop7h 27m

Lambert-St Louis

Sat 11/8

4:43 pm-8:51 pm

1 stop6h 08m

$227

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, August 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 $345. The month of September is another great option to travel to St. Louis, with average flight prices from California averaging around $356.

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 Tuesday when prices can be found for as low as $385. 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 $449. 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 $398 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 $422 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 $400 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 22% 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

$39

Fastest flight time

3h 19m

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 $39. The best round-trip flight deal from California to St. Louis found on momondo in the last 72 hours is $74.
The fastest flight from California to St. Louis takes 3h 19m
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 $108Free CancellationRating
5.8
3,219 reviews
Search Frontier flights
DeltaPriceFrom $184Free CancellationRating
8.0
7,980 reviews
Search Delta flights
American AirlinesPriceFrom $202Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
United AirlinesPriceFrom $246Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
SouthwestPriceFrom $290Free CancellationRating
8.0
4,244 reviews
Search Southwest flights
Alaska AirlinesPriceFrom $315Free CancellationRating
8.0
10,000 reviews
Search Alaska Airlines 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
Fairview Heights
Hermann
Maryland Heights
Florissant
O'Fallon
Fenton
Wentzville
Collinsville
Alton
St. Peters
Farmington
Festus
Glencoe
Eureka
Clayton
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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