What is the cheapest airline that flies from California to Lambert-St Louis?

Frontier, Delta, and United Airlines are the most popular carriers operating from California to Lambert-St Louis

How long does it take to fly to St. Louis?

Flight times from California to St. Louis vary, but if you’re flying out of Los Angeles and flying into St. Louis (one of the most popular routes), then the duration is 3h 25m on average. Another popular route from California to St. Louis is flying from San Diego to St. Louis, which will take roughly 3h 30m. Keep in mind that layovers or delays could extend your travel time.

How many flights depart from California to St. Louis on average per week?

The number of flights available between California and St. Louis is 142 per week as of November 2025. The most frequent departure day is Tue, with 20% of weekly flights leaving on this day.

How many flights depart from California to St. Louis on average per day?

20 flights are operational daily from California to St. Louis as of November 2025. The most popular departure time for this route is 6:00PM, with 50% of flights per day taking off in the evening.

What airlines fly to St. Louis?

Southwest, American Airlines and United Airlines are the top three most popular airlines that fly to St. Louis from California according to our data. Southwest is the first choice among our users, with 42% of people opting to fly with this airline when traveling to St. Louis. Keep in mind that there are 6 different airlines that fly to St. Louis on a routine basis, so you have a few additional options to choose from.

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?

As of November 2025, there are 6 operators available to choose from 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.

$56 Cheap Flights from California to St. Louis in 2025/26

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One-way

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Cheap round-trip flights

Enter your travel dates to find the best prices.

10:58 pm - 9:47 amLAS-STL

8h 49m1 stop

1:16 pm - 3:02 pmSTL-LAS

3h 46mnonstop

$122Frontier

Find Deal

Sat, Dec 6 - Sun, Dec 7

7:00 am - 12:12 pmLAS-STL

3h 12mnonstop

10:44 pm - 12:36 amSTL-LAS

3h 52mnonstop

$123Frontier

Find Deal

Thu, Dec 4 - Fri, Dec 12

7:00 am - 12:12 pmLAS-STL

3h 12mnonstop

1:16 pm - 3:02 pmSTL-LAS

3h 46mnonstop

$124Frontier

Find Deal

Fri, Dec 5 - Mon, Dec 8

3:55 pm - 2:48 pmSNA-STL

20h 53m1 stop

7:39 pm - 8:57 pmSTL-SNA

27h 18m2 stops

$164Multiple Airlines

Find Deal

Tue, Jan 13 - Fri, Jan 23

3:55 pm - 2:48 pmSNA-STL

20h 53m1 stop

9:48 pm - 8:57 pmSTL-SNA

25h 09m1 stop

$169Multiple Airlines

Find Deal

Tue, Jan 13 - Fri, Jan 23

11:45 am - 11:25 pmSMF-STL

9h 40m2 stops

6:35 am - 5:30 pmSTL-SMF

12h 55m2 stops

$254Delta

Find Deal

Wed, Jan 28 - Sun, Feb 1

7:45 pm - 9:10 amSJC-STL

11h 25m2 stops

6:30 am - 6:56 pmSTL-SJC

14h 26m2 stops

$254Delta

Find Deal

Mon, Dec 8 - Tue, Dec 16

6:18 am - 2:27 pmSJC-STL

30h 09m1 stop

7:00 am - 10:14 amSTL-SJC

29h 14m1 stop

$302Alaska Airlines

Find Deal

Mon, Dec 8 - Tue, Dec 16

6:40 am - 2:27 pmOAK-STL

29h 47m1 stop

7:00 am - 11:59 pmSTL-OAK

18h 59m1 stop

$312Alaska Airlines

Find Deal

Mon, Dec 8 - Fri, Dec 12

9:00 am - 5:10 pmSMF-STL

6h 10m1 stop

5:55 am - 10:20 amSTL-SMF

6h 25m1 stop

$322Southwest

Find Deal

Fri, Jan 23 - Mon, Jan 26

Southwest flights from California to St. Louis

Our best Southwest deals on California to St. Louis flight tickets

Southwest

Feb 20

SAN11:30 amSan Diego

5h 50m

1 stop

STL7:20 pmLambert-St Louis

Feb 23

STL2:25 pmLambert-St Louis

7h 35m

2 stops

SAN8:00 pmSan Diego

$260

Find similar

Southwest

Jan 21

SAN8:20 amSan Diego

6h 50m

2 stops

STL5:10 pmLambert-St Louis

Jan 26

STL10:35 amLambert-St Louis

8h 10m

2 stops

SAN4:45 pmSan Diego

$309

Find similar

Southwest

Nov 19

LAX2:15 pmLos Angeles

3h 30m

STL7:45 pmLambert-St Louis

Nov 24

STL5:45 amLambert-St Louis

4h 10m

LAX7:55 amLos Angeles

$335

Find similar

United Airlines flights from California to St. Louis

Our best United Airlines deals on California to St. Louis flight tickets

United Airlines

Feb 6

SAN1:00 pmSan Diego

5h 58m

1 stop

STL8:58 pmLambert-St Louis

Feb 10

STL9:57 amLambert-St Louis

9h 31m

2 stops

SAN5:28 pmSan Diego

$264

Find similar

United Airlines

Jan 16

SMF8:45 amSacramento Intl

6h 10m

1 stop

STL4:55 pmLambert-St Louis

Jan 19

STL2:45 pmLambert-St Louis

9h 08m

2 stops

SMF9:53 pmSacramento Intl

$332

Find similar

United Airlines

Dec 3

ONT6:00 amOntario

8h 28m

2 stops

STL4:28 pmLambert-St Louis

Dec 8

STL4:45 pmLambert-St Louis

7h 04m

1 stop

ONT9:49 pmOntario

$335

Find similar

Fly from

Fly to

Route

Depart

Return

Price

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Sat 12/6

10:58 pm-9:47 am

1 stop8h 49m

Lambert-St Louis

Sun 12/7

1:16 pm-3:02 pm

Nonstop3h 46m

$122

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Thu 12/4

7:00 am-12:12 pm

Nonstop3h 12m

Lambert-St Louis

Fri 12/12

10:44 pm-12:36 am

Nonstop3h 52m

$123

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Fri 12/5

7:00 am-12:12 pm

Nonstop3h 12m

Lambert-St Louis

Mon 12/8

1:16 pm-3:02 pm

Nonstop3h 46m

$124

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Tue 1/13

3:55 pm-2:48 pm

1 stop20h 53m

Lambert-St Louis

Fri 1/23

7:39 pm-8:57 pm

2 stops27h 18m

$164

Santa AnaSt. Louis

SNA - STL

SNASTL

Santa Ana J. Wayne/Orange Cnty

Tue 1/13

3:55 pm-2:48 pm

1 stop20h 53m

Lambert-St Louis

Fri 1/23

9:48 pm-8:57 pm

1 stop25h 09m

$169

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Wed 1/28

11:45 am-11:25 pm

2 stops9h 40m

Lambert-St Louis

Sun 2/1

6:35 am-5:30 pm

2 stops12h 55m

$254

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Mon 12/8

7:45 pm-9:10 am

2 stops11h 25m

Lambert-St Louis

Tue 12/16

6:30 am-6:56 pm

2 stops14h 26m

$254

San JoseSt. Louis

SJC - STL

SJCSTL

San Jose

Mon 12/8

6:18 am-2:27 pm

1 stop30h 09m

Lambert-St Louis

Tue 12/16

7:00 am-10:14 am

1 stop29h 14m

$302

OaklandSt. Louis

OAK - STL

OAKSTL

Oakland

Mon 12/8

6:40 am-2:27 pm

1 stop29h 47m

Lambert-St Louis

Fri 12/12

7:00 am-11:59 pm

1 stop18h 59m

$312

SacramentoSt. Louis

SMF - STL

SMFSTL

Sacramento Intl

Fri 1/23

9:00 am-5:10 pm

1 stop6h 10m

Lambert-St Louis

Mon 1/26

5:55 am-10:20 am

1 stop6h 25m

$322

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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

Prices

Airlines

Other information

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 $391. 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 $375 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 $426 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 $398 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 $305 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	$159
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 $159. The best round-trip flight deal from California to St. Louis found on momondo in the last 72 hours is $296.

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?
As of November 2025, there are 6 operators available to choose from 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?
Based on momondo bookings for flights between California and St. Louis, the leading plane model is Boeing 737 MAX 8, making up 24.17% of the total bookings. Other popular models include Embraer 175 with 21.62%, Boeing 737-800 Passenger/BBJ2 (winglets) with 11.01%, and Boeing 737-700 Passenger/BBJ1 (winglets) with 8.92%.

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
Frontier	PriceFrom $122	Free Cancellation	Rating 5.8 3,103 reviews	Search Frontier flights
Delta	PriceFrom $173	Free Cancellation	Rating 7.9 8,007 reviews	Search Delta flights
American Airlines	PriceFrom $202	Free Cancellation	Rating 7.2 11,048 reviews	Search American Airlines flights
Alaska Airlines	PriceFrom $245	Free Cancellation	Rating 8.0 11,316 reviews	Search Alaska Airlines flights
United Airlines	PriceFrom $246	Free Cancellation	Rating 7.4 9,016 reviews	Search United Airlines flights
Southwest	PriceFrom $283	Free Cancellation	Rating 8.0 4,245 reviews	Search Southwest flights

St. Charles

Chesterfield

Hermann

Fairview Heights

Florissant

Maryland Heights

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

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

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Cheap flights from California to St. Louis from $56

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 2/13. 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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Southwest flights from California to St. Louis

Our best Southwest deals on California to St. Louis flight tickets

United Airlines flights from California to St. Louis

Our best United Airlines deals on California to St. Louis flight tickets

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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?

What is the cheapest day to depart on your flight to St. Louis?

What is the cheapest time of day to depart on your flight to St. Louis?

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?

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.

What is the cheapest airline that flies from California to Lambert-St Louis?

Frontier, Delta, and United Airlines are the most popular carriers operating from California to Lambert-St Louis

What airlines fly to St. Louis?

How many flights depart from California to St. Louis on average per day?

20 flights are operational daily from California to St. Louis as of November 2025. The most popular departure time for this route is 6:00PM, with 50% of flights per day taking off in the evening.

How many flights depart from California to St. Louis on average per week?

The number of flights available between California and St. Louis is 142 per week as of November 2025. The most frequent departure day is Tue, with 20% of weekly flights leaving on this day.

How long does it take to fly 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

Fastest flight time

Direct flights

Airports in St. Louis

When did momondo last update prices for flights from California to Lambert-St Louis Airport?

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?

What documentation or ID do you need to fly to Lambert-St Louis Airport?

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

Traveling to a place near St. Louis?

Why use momondo?

Why should I use momondo to find a flight deal from California to St. Louis?

Can I find flights from California to St. Louis with flexible booking policies on momondo?

How can momondo help me find flights from California to St. Louis?

I’m not ready to book a flight from California to St. Louis right now. Can momondo alert me if prices change?

An easier way to manage your St. Louis trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to the United States

Airports servicing Missouri