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St. Louis

$40+ Cheap flights from California to St. Louis (STL)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/30. Fares are subject to change and may not be available on all flights or dates of travel.
LAX — STL
Jan 15 — Jan 221
Thu 1/15
Thu 1/22
1 adult, Economy
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Cheap flight deals from California to St. Louis

Cheapest flights from California to St. Louis
Explore the most affordable flight options available from California to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

This Frontier deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:30 amLAS - STL
1 stop11h 37mFrontier
Mon 1/510:10 pmSTL - LAS
Nonstop3h 52mFrontier
Deal found 12/15$153
This CheapOair deal was found by Cheapflights users on 12/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/184:47 pmSAN - STL
1 stop15h 15mFrontier
Wed 1/213:46 pmSTL - SAN
1 stop9h 45mFrontier
Deal found 12/13$217
This Frontier deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/284:05 pmLAS - STL
Nonstop3h 20mFrontier
Mon 1/510:10 pmSTL - LAS
Nonstop3h 52mFrontier
Deal found 12/15$226
This Frontier deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/246:00 amONT - STL
1 stop8h 24mFrontier
Wed 12/247:43 pmSTL - ONT
1 stop6h 16mFrontier
Deal found 12/15$228
This Frontier deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1912:59 amLAS - STL
1 stop7h 03mFrontier
Thu 1/15:19 pmSTL - LAS
Nonstop3h 49mFrontier
Deal found 12/16$231
This Kiwi.com deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/266:30 amLAS - STL
1 stop11h 17mFrontier
Thu 1/15:19 pmSTL - LAS
Nonstop3h 49mFrontier
Deal found 12/16$232
This CheapOair deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/233:30 pmLAX - STL
1 stop22h 54mFrontier
Sun 1/410:10 pmSTL - LAX
1 stop24h 21mFrontier
Deal found 12/16$235
This Flightnetwork deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/2410:45 pmLAX - STL
1 stop8h 55mFrontier
Sat 1/310:10 pmSTL - LAX
1 stop16h 06mFrontier
Deal found 12/15$240
This CheapOair deal was found by Cheapflights users on 12/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/296:30 amLAS - STL
1 stop11h 37mFrontier
Tue 1/65:11 pmSTL - LAS
1 stop18h 32mFrontier
Deal found 12/16$249
This Kiwi.com deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/309:20 pmLAX - STL
2 stops10h 42mMultiple Airlines
Sat 1/310:10 pmSTL - LAX
1 stop16h 06mMultiple Airlines
Deal found 12/15$252
This Frontier deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:06 pmSAN - STL
1 stop6h 19mFrontier
Mon 1/57:43 pmSTL - SAN
1 stop6h 16mFrontier
Deal found 12/15$253
This Expedia deal was found by Cheapflights users on 12/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/223:30 pmLAX - STL
1 stop27h 55mFrontier
Mon 1/510:10 pmSTL - LAX
1 stop23h 11mFrontier
Deal found 12/15$253

Find flight deals from California to St. Louis

Keep the following information in mind while searching for California to St. Louis flight deals. Data was last updated December 16, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$80
(Frontier)

One-way from

$40
(Super.com)

Popular in

June

Cheapest in

October

Average price

$420

Good round-trip deal

$356 or less

Good one-way deal

$152 or less
Provider with most accurate pricing for Los Angeles-Lambert-St Louis flight deals.
Search Deals
Provider most trusted by Cheapflights users for Los Angeles-Lambert-St Louis flights.
Search Deals
From California to Lambert-St Louis
Search Deals
One-way flight from California to Lambert-St Louis
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($21 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($4 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals
Price to beat on a round-trip flight from California to Lambert-St Louis.
Search Deals
Price to beat on a one-way flight from California to Lambert-St Louis.
Search Deals

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
Use the filters below to find and compare flights from California to St. Louis that are best for you.

Fly from

California

Fly to

St. Louis

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-11:31 pm

Nonstop3h 59m

$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

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

Thu 2/5

10:01 pm-11:49 pm

Nonstop3h 48m

$126

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

7:43 pm-11:34 pm

1 stop5h 51m

$131

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Fri 1/9

4:47 pm-10:02 am

1 stop15h 15m

Lambert-St Louis

Sun 1/11

9:46 pm-12:14 pm

1 stop16h 28m

$139

Las VegasSt. Louis

LAS - STL

LASSTL

Las Vegas Harry Reid Intl

Mon 1/12

7:09 pm-2:48 pm

2 stops41h 39m

Lambert-St Louis

Mon 1/19

1:35 pm-3:30 pm

Nonstop3h 55m

$142

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Fri 1/23

8:16 pm-2:46 pm

1 stop16h 30m

Lambert-St Louis

Sun 1/25

9:27 pm-8:51 am

1 stop13h 24m

$142

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Tue 1/6

3:29 pm-10:02 am

1 stop16h 33m

Lambert-St Louis

Mon 1/12

7:43 pm-5:09 pm

1 stop23h 26m

$142

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Sun 1/18

9:12 pm-8:08 pm

1 stop20h 56m

Lambert-St Louis

Wed 1/21

3:46 pm-10:54 am

1 stop21h 08m

$152

San DiegoSt. Louis

SAN - STL

SANSTL

San Diego

Wed 1/7

9:43 am-12:12 pm

1 stop24h 29m

Lambert-St Louis

Mon 1/12

7:43 pm-5:09 pm

1 stop23h 26m

$154

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/15

Showing 1-10 of 60 results
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Best time to book a flight from California to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from California with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from California to St. Louis

What is the cheapest month to book a flight from California to St. Louis?

Currently, September is the cheapest month in which you can book a flight from California to St. Louis (average of $71). Flying from California to St. Louis in August is currently the most expensive (average of $206). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from CA to STL?

Find hourly flight availability from California to St. Louis. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 16, 2025.

When flying from California to St. Louis, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 28% versus a flight in the morning.

What is the cheapest day to fly from California to St. Louis?

Use this chart to determine the cheapest time to fly round-trip from California to St. Louis. Price data was last updated on December 13, 2025.

Travelers seeking maximum savings on their California to St. Louis flight should consider departing on Thursday evenings when fares are most often at their lowest. Sunday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from California to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to St. Louis from California?

    Lambert-St Louis (STL), located 12.7 mi from the city center, is the airport you fly into when you book flights from California to St. Louis.

  • How popular is this California to St. Louis flight route?

    The California to Lambert-St Louis flight path was viewed by 24 users in the past month. Keep an eye out for changes in search interest prior to high and low season.

  • How long is the flight from California to St. Louis?

    Airlines like Frontier and Delta fly from California to St. Louis in about 3h 16m. The time it takes to get you to your destination can typically vary by up to 7h 34m. The distance from California to St. Louis is about 1367 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines to fly from California to St. Louis one-way?

    The cheapest airlines for a one-way flight from California to St. Louis are Frontier ($67), American Airlines ($89), and Southwest ($111).

  • What are the most popular routes from California to St. Louis?

    The most popular route from California to St. Louis is Los Angeles - Lambert-St Louis. You may also consider San Francisco - Lambert-St Louis or Las Vegas Harry Reid Intl - Lambert-St Louis.

  • What are the most reliable airlines from California to St. Louis?

    The top 3 most reliable airlines when flying from California to St. Louis are SkyWest Airlines (80%), American Airlines (80%) and Cathay Pacific (75%).

  • What are the cheapest flights from California to St. Louis?

    Looking for the cheapest flight from California to St. Louis? While on average our users pay $364, our data indicates the cheapest price to be $118. The most popular route (Los Angeles - Lambert-St Louis), is priced around $151.

  • Can I find deals for flights from California to St. Louis that include hotel bookings?

    Yes. In addition to deals on California to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from California to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from California to St. Louis.

  • Can I find deals for business class flights from California to St. Louis?

    Yes. Cheapflights offers flight deals from California to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from California to St. Louis?

    Currently, September is the cheapest month in which you can book a flight from California to St. Louis (average of $71). Flying from California to St. Louis in August is currently the most expensive (average of $206). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fairview Heights
Maryland Heights
Collinsville
Swansea
Eureka
Glencoe
St. Peters
Chesterfield
Alton
Farmington
Festus

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Alternative routes for California to St. Louis

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Top 6 airlines flying from California to St. Louis

Discover the top 6 airlines that operate flights from California to St. Louis. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 16, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$128Average$245FlexibilityNo cancel feeOn-time62%
DeltaCheapest$184Average$363FlexibilityNo cancel feeOn-timeN/A
American AirlinesCheapest$202Average$391FlexibilityNo cancel feeOn-time71%
Alaska AirlinesCheapest$245Average$509FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$246Average$438FlexibilityNo cancel feeOn-time69%
SouthwestCheapest$283Average$454FlexibilityNo cancel feeOn-time63%

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